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Pristomyrmex
| Pristomyrmex Temporal range: 37.2–0 Ma Eocene – Recent | |
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| Pristomyrmex minusculus | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Crematogastrini |
| Alliance: | Myrmecina genus group |
| Genus: | Pristomyrmex Mayr, 1866 |
| Type species | |
| Pristomyrmex pungens | |
| Diversity | |
| 61 species 3 fossil species (Species Checklist, Species by Country)
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| Synonyms | |
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| Common Name | |
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| Amime-ari-zoku | |
| Language: | Japanese |
Hita Garcia, Wiesel and Fischer (2013) - A moderately sized genus distributed in the Afrotropical, Malagasy, Oriental, and Indo-Australian regions, but also in smaller areas of the Palaearctic. The genus taxonomy is in a good state. Wang (2003) revised the genus on and provides good species keys. Most species of Pristomyrmex can be found in rainforests (Wang, 2003), although the Afrotropical representatives seem to be less restricted to this habitat and can be found in a variety of forest types and in more open woodlands (Bolton, 1981a). Their diet is most likely carnivorous and they nest in the soil, the leaf-litter, in rotten wood, or around plant roots (Taylor, 1965b; Bolton, 1981a; Wang, 2003). Some species display "faking-death" behaviour if disturbed, and some species are nocturnal.
Identification
Wang (2003): Pristomrymrex belongs to the subfamily Myrmicinae. It possesses a raised transverse ridge or a few toothlike prominences on the dorsal labrum in all female castes, including workers, ergatoid queens, and queens. This character is also shared by the myrmicine genera Acanthomyrmex, Myrmecina, and Perissomyrmex. As a result, these four living genera are grouped together in the tribe Myrmecinini (Bolton, 1994, 1995, personal communication; Brown, 1971). Pristomyrmex is unique in the tribe because it is the only genus possessing 11 antennal segments in all three female castes and 12 segments in the male.
Radchenko & Dlussky (2018) - Pristomyrmex workers clearly distinguish from other members of the tribe Myrmecinini (sensu Bolton 2003, Ogata & Okido 2007) by the combination of features, particularly: they are monomorphic; the antennae with 11 segments; the frontal lobes are absent or strongly reduced, vestigial and vertical, so that the antennal sockets are fully exposed; the propodeum, often also pronotum, with spines or at least long teeth (with the only one known exception); the petiole with long peduncle and quite big and high node with rounded dorsum. In contrary, workers of Perissomyrmex are polymorphic, and those of Acanthomyrmex are dimorphic; the antennae in Myrmecina and Acanthomyrmex are 12-segmented, and in Perissomyrmex 9-segmented; the frontal lobes in Myrmecina well developed and at least partly cover the antennal sockets; the pronotum of Myrmecina and Perissomyrmex are always without spines or tooth; at last, the petiole in Myrmecina is sessile, without anterior peduncle and rounded node.
Males of extant Pristomyrmex species are characterized mainly by the strongly reduced, vestigial mandibles, by the 12-segmented antennae with short scape and filiform antennal funiculus lacking apical club, by the 5-segmented maxillary palps and 3-segmented labial ones, by the presence of Mayrian furrows, and usually by the lack of spur on middle and hind tibiae (sometimes could be very short, vestigial and barely defined simple spur), and the forewing is with only one closed cell 1r+2r.
Keys including this Genus
Keys to Species in this Genus
- Key to Australian Pristomyrmex Species
- Key to Pristomyrmex workers
- Key to Pristomyrmex of China
- Key to Afrotropical Pristomyrmex
- Key to Pristomyrmex of the Philippines
Distribution
From Wang (2003): Pristomymrex occurs primarily in the Oriental region, but six endemic species are present in the eastern rainforest of Australia and five endemic species in Africa. In addition, in Mauritius there are three native species, one of which also occurs on Reunion Island. Lastly, one species, Pristomyrmex punctatus, has invaded temperate China, Korea, and Japan. This species has also been detected at two entry ports in the United States and thus shows potential for spread via human commercial actions.
Distribution and Richness based on AntMaps
Species by Region
Number of species within biogeographic regions, along with the total number of species for each region.
| Afrotropical Region | Australasian Region | Indo-Australian Region | Malagasy Region | Nearctic Region | Neotropical Region | Oriental Region | Palaearctic Region | |
|---|---|---|---|---|---|---|---|---|
| Species | 5 | 7 | 44 | 3 | 0 | 0 | 9 | 4 |
| Total Species | 2841 | 1736 | 3045 | 932 | 835 | 4379 | 1741 | 2862 |
Fossils
Fossils are known from: Bitterfeld amber, Baltic Sea region, Europe (Bartonian, Middle to Late Eocene), Danish-Scandinavian amber (Bartonian, Middle to Late Eocene), Rovno amber, Baltic Sea region, Europe (Priabonian, Late Eocene).
Biology
Zettel (2006), reporting on the Philippine Pristomymrex fauna - Most species of Pristomyrmex dwell in the rainforest, foraging as predators or scavengers (Wang 2003). Of the species collected by the author, only P. punctatus has been found in obviously disturbed habitats; this species is the most widespread in the genus (see Wang 2003). All other Philippine species seem to be confined to humid forest habitats. Typical collection sites are wet, mossy rock faces or fallen tree trunks. Rarely, specimens have been observed foraging on leaves (a few specimens of Pristomyrmex longispinus and Pristomyrmex schoedli). A nest of Pristomyrmex quadridens has been discovered in a piece of rotten wood (dimensions about 15 × 20 × 50 cm) laying on the moist soil and rocks on a river bed. Usually specimens of Pristomyrmex are only collected in small numbers, but approximately 100 P. schoedli workers were collected within 10 minutes from a fallen log at Baybay (site #422) and numerous specimens remained uncollected, which suggests that nest sizes in Pristomyrmex can occasionally be high. Low worker numbers, large distance between specimens running on trails, and the relatively slow motion of undisturbed specimens make Pristomyrmex rather discreet animals. Nevertheless, Pristomyrmex seem to be rare organisms. Deforestation on many Philippine islands may already have reduced the diversity of those species, which are restricted to moist forests.
From Wang (2003): Most species dwell in the rainforest, foraging as predators or scavengers. An Asian species, Pristomyrmex punctatus, however, occurs in open and disturbed habitats (e.g., bare hills, agricultural areas, and beaches). These ants prefer to nest in soil, litter, or rotten wood; in rotten parts of living trees; in dead standing trees; or around plant roots.
Pristomyrmex is of great interest because it exhibits several unusual biological and evolutionary phenomena. The absence of morphologically normal queens and reproduction primarily by unmated workers in P. punctatus {=P. pungens) is a highly unusual life history in the Formicidae. Ergatoid queens, a special wingless female caste morphologically intermediate between the queen and the worker, are present in at least four species: Pristomyrmex punctatus, Pristomyrmex africanus, Pristomyrmex wheeleri, and Pristomyrmex mandibularis; two of them (P. africanus and P. wheeleri) possess both queen and ergatoid queen castes.
Simulating death, slowness of movement, and nocturnal foraging has been recorded in Pristomyrmex (Donisthorpe, 1946; Taylor, 1965; Weber, 1941). Colony size varies greatly among species, ranging from about a dozen to several thousand workers (Donisthorpe, 1946; Itow et al., 1984; Mann, 1919; Taylor, 1965, 1968).
Bolton (1981) noted the following regarding the African fauna: Most Pristomyrmex species nest in rotten wood, either in fallen twigs in the litter layer or in larger pieces of timber. Some nest in rotten parts of standing trees but most appear to prefer the ground, foraging in the leaf litter and top soil. Of the five African species three, Pristomyrmex fossulatus,Pristomyrmex cribrarius and Pristomyrmex trogor, seem fairly limited in distribution, with the first known from South Africa, the second from South Africa and Mozambique, and the latter only from Zaire. Pristomyrmex orbiceps is widely distributed throughout the wet forest zones of west and central Africa whilst the last species, Pristomyrmex africanus, has an extremely wide range and seems able to inhabit woodlands and forests virtually throughout sub-Saharan Africa.
Life History Traits
- Mean colony size: 100 (Greer et al., 2021)
- Compound colony type: not parasitic (Greer et al., 2021)
- Nest site: hypogaeic; arboreal (Greer et al., 2021)
- Diet class: predator (Greer et al., 2021)
- Foraging stratum: subterranean/leaf litter; arboreal (Greer et al., 2021)
- Foraging behaviour: cooperative (Greer et al., 2021)
Castes
Morphology
Worker Morphology
Explore: Show all Worker Morphology data or Search these data. See also a list of all data tables or learn how data is managed.
• Antennal segment count: 11 • Antennal club: 3 • Palp formula: 5,3; 4,3; 4,2; 2,3; 2,2; 1,3; 1,2 • Total dental count: 3-5(0-1) • Spur formula: 1 simple, 1 simple; 0, 0 • Pronotal Spines: dentiform; present • Mesonotal Spines: absent • Propodeal Spines: dentiform; present • Petiolar Spines: absent • Caste: none or weak • Sting: present • Metaplural Gland: present • Cocoon: absent
Male Morphology
- Explore: Show all Male Morphology data or Search these data. See also a list of all data tables or learn how data is managed.
• Antennal segment count 12 • Antennal club 0 • Palp formula 5,3; 2,3; 1,3 • Total dental count 0 • Spur formula 0, 0
Karyotype
Species Uncertain
- Pristomyrmex sp.2: n = 14 (Malaysia) (Imai et al., 1983).
- Pristomyrmex: 2n = 22 (Malaysia) (Goni et al., 1982).
All Karyotype Records for Genus
- See additional details at the Ant Chromosome Database.
- Explore: Show all Karyotype data or Search these data. See also a list of all data tables or learn how data is managed.
| Taxon | Haploid | Diploid | Karyotype | Locality | Source | Notes |
|---|---|---|---|---|---|---|
| Pristomyrmex | 22 | Malaysia | Goni et al., 1982 | |||
| Pristomyrmex | 14 | Malaysia | Imai et al., 1983 | |||
| Pristomyrmex punctatus | 12 | 24 | Japan | Imai & Yosida, 1964; Imai, 1966; Imai, 1969; Itow et al., 1984 | as ''Pristomyrmex pungens'' |
Phylogeny
| Myrmicinae |
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See Phylogeny of Myrmicinae for details.
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- PRISTOMYRMEX [Myrmicinae: Myrmecinini]
- Pristomyrmex Mayr, 1866b: 903. Type-species: Pristomyrmex pungens, by monotypy.
- Pristomyrmex senior synonym of Odontomyrmex: Mann, 1919: 341; Emery, 1924d: 233.
- Pristomyrmex senior synonym of Hylidris: Brown, 1953c: 9.
- Pristomyrmex senior synonym of Dodous: Brown, 1971a: 3.
- DODOUS [junior synonym of Pristomyrmex]
- Dodous Donisthorpe, 1946f: 145. Type-species: Dodous trispinosus, by original designation.
- Dodous junior synonym of Pristomyrmex: Brown, 1971a: 3.
- HYLIDRIS [junior synonym of Pristomyrmex]
- Hylidris Weber, 1941a: 190. Type-species: Hylidris myersi (junior synonym of Pristomyrmex africanus), by original designation.
- Hylidris junior synonym of Pristomyrmex: Brown, 1953c: 9.
- ODONTOMYRMEX [junior synonym of Pristomyrmex]
- Odontomyrmex André, 1905: 207. Type-species: Odontomyrmex quadridentatus, by monotypy.
- Odontomyrmex subgenus of Pristomyrmex: Forel, 1917: 244; Wheeler, W.M. 1922a: 682.
- Odontomyrmex junior synonym of Pristomyrmex: Mann, 1919: 341; Emery, 1924d: 233; Taylor, 1965b: 35; Bolton, 1981b: 282.
Description
Wang (2003):
Diagnosis of worker, queen, and ergatoid queen. Combination of the following asterisked four characters (i.e., characters 2, 7, 11, and 29 in the worker caste) separating Pristomyrmex from other myrmicine genera.
Worker
Possessing the following combination of characters:
1. Small (TL 1.74, HL 0.46, HW 0.46) to large-sized (TL 7.06, HL 1.68, HW 1.74) monomorphic myrmicine ants.
2.(*) Mandible somewhat subtriangular; masticatory margin of mandible with three to five teeth, which have one or the other of the following six basic arrangements:
(1) the strongest apical + the second strongest preapical + the smallest third + the acute basal tooth, diastema lacking, as in levigatus group and in profundus group, or
(2) the strongest apical + the second strongest preapical + two smaller teeth of similar size, diastema indistinct or lacking, as in umbripennis group, or
(3) the strongest apical + the second strongest preapical + a shorter (first) diastema (sometimes the first diastema is not distinct) + a small denticle + a longer (second) diastema + a small basal denticle, as in both P. bispinosus and P. trispinosus, or
(4) the apical + the preapical + a longer diastema + a small denticle + a shorter diastema (sometimes the second diastema is indistinct) + a small basal denticle, as in P. browni, or
(5) the strongest apical + the second strongest preapical + a distinct diastema + a basal tooth (which is sometimes formed by the fusion of the two small teeth) or two (or three) small teeth of similar size, as in punctatus group, cribrarius group, and most members of the quardridens group, or
(6) the strongest apical + the second strongest preapical + an intercalary tooth + a very short diastema (or this diastema indistinct) + two small teeth of similar size, as shown in P. trachylissus.
3. Basal margin of mandible with a broad-based hiangular or an acute and prominent tooth, or only curved, not forming tooth, or almost straight.
4. Median part of clypeus shieldlike, projecting posteriorly between the bases of the antennae; lateral parts of clypeus in front of antennal insertions usually reduced to ridges but rarely (in the two Oriental species P. divisus and P. pulcher) developed so that the antennal fossae do not reach the lateral anterior margins of clypeus.
5. Anterior clypeal margin usually with a median tooth and one to three pairs of lateral denticles (or crenulate shapes) but sometimes the median tooth rudimentary (as in some species of the levigatus group) and sometimes anterior clypeal margin lacking any distinct denticles (as in P. profundus, P. divisus, and P. pulcher).
6. Ventral surface of clypeus with a median tooth or two lateral teeth, or with a transverse ridge, or without any ridge or tooth.
7.(*) Dorsal labrum with a raised transverse ridge or a few toothlike prominences, present on the anterior portion of labrum in most species.
8. Palp formula 1,2, 1,3, 2,2, 2,3, 4,3, or 5,3.
9. Frontal lobes absent in punctatus and trispinosus groups or weak, as in levigatus, profundus, and quadridens groups, or somewhat expanded, as in umbripennis group; as a result, the articulations of the antennae are mostly or entirely exposed in full-face view.
10. Frontal carinae usually developed, extending to the level of the posterior margins of eyes, but sometimes frontal carinae absent or very short, as in the trispinosus group, in P. trogor, and in P. longispinus.
11.(*) Antennae with 11 segments; apical three segments forming a distinct club.
12. Base of each antennal scape encircled by a narrow lamella, except in P. profundus; this lamella usually with a broad and deep notch on the center of dorsal surface in the umbripennis group but entire in the other species groups.
13. Antennal scrobes usually absent or weakly developed, but in P. profundus, the scrobes are deep and well developed.
14. Eyes present in all known species, situated approximately at the midlength of the sides of the head; usually moderatesized, but small in the several species (P. boltoni, P. coggii, P. longus, P. eduardi, P. picteti, and P. pollux).
15. Alitrunk usually lacking dorsal sutures, but in the three species of the trispinosus group, a promesonotal suture or impression present.
16. Pronotum unarmed, or armed with a pair of tubercles, teeth, or spines of varying sizes.
17. Mesonotum usually unarmed, but with a pair of thick, blunt, and digitlike short prominences in P. trispinosus, and sometimes weakly tuberculated in P. bispinosus and P. browni.
18. Propodeum armed with a pair of teeth or spines, except in P. inermis.
19. Metapleural lobes usually subtriangular, or each with a blunt-rounded to semicircular apex, but indistinct in P. profundus.
20. Fore tibial spurs pectinate. Middle and hind tibiae sometimes without any spur, sometimes with either simple or hairlike spurs.
21. Propodeal spiracles circular and high-positioned on the lateral surfaces of the propodeum.
22. Metapleural gland bullae large, separated from the propodeal spiracles, and positioned above the posterior lower corners of propodeum.
23. Petiole in profile nodiform or wedge-shaped, pedunculate, usually with a long anterior peduncle.
24. Subpetiole sometimes without a ventral process, sometimes bearing a narrow semitranslucent lamella. In P. acerosus, a pinlike process is present.
25. Postpetiole in profile nodiform, usually rounded dorsally.
26. Petiole spiracle, postpetiole spiracle, and first gastral spiracle visible.
27. Dorsal surfaces of head and alitrunk smooth, or possessing either scattered foveolate punctures, or foveolate-reticulate sculpture, or developed rugoreticulum, or regular striate sculpture. Gaster unsculptured.
28. Dorsal surfaces of head and alitrunk usually with numerous hairs, but only a few hairs present on the dorsal alitrunk in P. fosslilatus, P. orbiceps, and P. trogor. Petiole and postpetiole each usually with one to three pairs of hairs, but sometimes more pairs of hairs present; sometimes petiole and postpetiole lacking hairs. First gastral tergite usually without hairs or with a few sparse hairs, but sometimes first gastral tergite covered with numerous, evenly distributed, erect or suberect hairs.
29. (*) Anterior clypeal margin lacking a median seta at the midpoint of the margin, instead usually having two to three pairs of long, forward-projecting hairs flanking the midpoint of margin.
30. Sting slender and long.
Queen
Usually alate, but in some species (P. punctatus, P. mandibulans), only ergatoid queens have been found. In some species (P. wheeleri, P. africanus), both alate and ergatoid queens exist.
Alate. Characters similar to those of worker in the structure and shape of mandible, palp formula, clypeus, frontal lobes, frontal carinae, antennae, metapleural lobes, tibial spurs, petiole node, postpetiole, and sting as well as in the sculpture of body. But larger, with slightly or much larger eyes, than in the conspecific worker; three ocelli present. The alitrunk with wings and flight sclerites; well-marked dorsal sutures present. Pronotal spines usually absent, but in some species, the pronotum is armed with a pair of teeth that are much shorter than in conspecific worker; propodeal teeth or spines usually shorter than those of conspecific worker. Wing venation as shown in Figure. On the forewings, the marginal cell (see Holldobler and Wilson, 1990: 9) is always open; R + Sc thick (for the explanation of symbols used, see Brown and Nutting, 1950); A short, far from the anal angle; A, Cu-A, Mf2+3 usually reduced to vestigial lines distally; cross-vein m-cu and r-m absent; cross-vein Cu-a usually present but sometimes broken in larger species (such as P. picteti, P. umbripennis) and sometimes rudimentary or very weak in some samples of a few smaller species (e.g., P. orbiceps, P. lucidus); 1r absent; anal lobe usually indistinct in smaller species but present in larger species. Hind wings without anal lobe. (Note: The venation of the both fore and hind wings of alates, in Pristomyrmex, is rather stable, with only slight variations within the different species. For example, on the forewings, Mf2+3, sometimes becomes an almost entirely vestigial line, but sometimes it is distinct and rather long; Rsf4 + Rsj5 is rather thick and long in some larger species but thin and short in some smaller species).
Ergatoid. General characters, including the pronotal prominences and size of body, similar to those of the conspecific worker. Ocellus present (one ocellus in P. mandibularis but three ocelli in P. punctatus, P. wlteeleri, and P. africanus); apterous, but mesonotum more convex than in conspecific worker; pro-mesonotal suture present in P. mandibularis but represented by an impression in P. punctatus, P. wheeleri, and P. africanus.
Male
Possessing the following combination of characters (summarized according to 54 specimens falling into at least 17 species):
1. Small to moderate size (TL 2.40-6.04, HL 0.48-0.94, HW 0.51-0.98, HWE 0.62- 1.10), usually smaller than the conspecific queen.
2. Head, in full-face view, across and including the eyes, usually broader than long.
3. Mandibles vestigial, very small, rounded or toothlike, far from meeting.
4. Anterior margin of labrum broadly concave at center; dorsum of labrum without any transverse ridge or toothlike prominences.
5. Eyes very large, well developed, and convex, situated at the sides of head.
6. Antennae filiform, 12 segments, lacking a lamella encircling the base. Scapes short, usually distinct shorter than the maximum length of eye; of the other 11 funicular segments, the first segment shortest, the apical segment longest, the remaining nine segments much longer than their broad.
7. Three ocelli conspicuous and well developed, situated on the vertex of the head.
8. Antennal sockets set back from the posterior margin of the clypeus.
9. Antennal scrobes absent.
10. Frontal carinae absent or very short and weak.
21. Venation as in alate queen.
22. Legs slender; fore tibial spurs pectinate; middle and hind tibiae usually lacking any spurs but sometimes simple spurs are present.
23. Petiole with a long or a rather long anterior peduncle. In dorsal view, sides of petiole subparallel. Petiole node low, lower than in the conspecific worker and queen; subpetiole lacking any lamella or toothlike projection.
24. Postpetiole node rather low, lower than in the con specific worker and queen. In profile, subpostpetiole usually lacking any projections, but sometimes bearing a small tooth.
25. Positions of spiracles on propodeum, petiole, postpetiole, and first gastral segment similar to those in the con specific worker and queen.
26. Usually much less sculptured than conspecific worker and queen.
27. Numerous hairs present on the entire dorsal surfaces of body.
Larva
According to Wheeler and Wheeler's (1954, 1960, 1973, 1976) studies, the larva of Pristomyrmex has the following combination of characters:
1. Stout and rather short.
2. Head extremely long and narrow.
3. Thorax more slender than abdomen and forming a neck, which is curved ventrally. Diameter greatest near middle of abdomen, decreasing gradually toward head; posterior end rounded.
4. Body without tubercles.
5. Mandible s subtriangular, without medial blade; apical tooth curved medially and usually acute; subapical medial tooth small.
6. Body hairs numerous, with five or six types, including anchor-tipped hairs. Head hair few, short to moderately long.
7. Gula spinulose.
8. Anterior surface of labium densely spinulose.
9. Palps lateral.
Pupa. Not enclosed in cocoons (Wheeler and Wheeler, 1976).
References
- André, E. 1905. Description d'un genre nouveau et de deux espèces nouvelles de fourmis d'Australie. Rev. Entomol. (Caen) 24: 205-208.
- Ashmead, W. H. 1905c. A skeleton of a new arrangement of the families, subfamilies, tribes and genera of the ants, or the superfamily Formicoidea. Can. Entomol. 37: 381-384 (page 383, Pristomyrmex in Myrmicinae, Myrmicini)
- Barden, P. 2017. Fossil ants (Hymenoptera: Formicidae): ancient diversity and the rise of modern lineages. Myrmecological News 24: 1-30.
- Barden, P., Engel, M.S. 2020. Fossil social insects. Encyclopedia of Social Insects, Springer, Cham (doi:10.1007/978-3-319-90306-4_45-1).
- Bernard, F. 1953b [1952]. La réserve naturelle intégrale du Mt Nimba. XI. Hyménoptères Formicidae. Mém. Inst. Fr. Afr. Noire 19: 165-270 (page 251, Pristomyrmex in Myrmicinae, Tetramoriini)
- Blaimer, B.B., Ward, P.S., Schultz, T.R., Fisher, B.L., Brady, S.G. 2018. Paleotropical diversification dominates the evolution of the hyperdiverse ant tribe Crematogastrini (Hymenoptera: Formicidae). Insect Systematics and Diversity 2(5): 3; 1-14 (doi:10.1093/isd/ixy013).
- Bolton, B. 1981b. A revision of six minor genera of Myrmicinae (Hymenoptera: Formicidae) in the Ethiopian zoogeographical region. Bull. Br. Mus. (Nat. Hist.) Entomol. 43: 245-307 (page 282, Revision of Afrotropical species)
- Bolton, B. 1994. Identification guide to the ant genera of the world. Cambridge, Mass.: Harvard University Press, 222 pp. (page 105, Pristomyrmex in Myrmicinae, Myrmecinini)
- Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 256, Pristomyrmex in Myrmicinae, Myrmicinini)
- Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 256, Pristomyrmex in Myrmicinae, Myrmicinini)
- Brown, W. L., Jr. 1953c. Characters and synonymies among the genera of ants. Part I. Breviora 11: 1-13 (page 9, Pristomyrmex senior synonym of Hylidris)
- Brown, W. L., Jr. 1971a. Characters and synonymies among the genera of ants. Part IV. Some genera of subfamily Myrmicinae (Hymenoptera: Formicidae). Breviora 365: 1-5 (page 3, Pristomyrmex senior synonym of Dodous)
- Burchill, A.T., Moreau, C.S. 2016. Colony size evolution in ants: macroevolutionary trends. Insectes Sociaux 63, 291–298 (doi:10.1007/s00040-016-0465-3).
- Burger, H.F., Vondráčková, K., Skłodowski, M., Qian-Qun Koid, Dent, D.H., Wallace, K., Fayle, T.M. 2021. Protection from herbivores varies among ant genera for the myrmecophilic plant Leea aculeata in Malaysian Borneo. Asian Myrmecology 14, e014002 (doi:10.20362/am.014002).
- Cantone S. 2018. Winged Ants, The queen. Dichotomous key to genera of winged female ants in the World. The Wings of Ants: morphological and systematic relationships (self-published).
- Dalla Torre, K. W. von. 1893. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. Vol. 7. Formicidae (Heterogyna). Leipzig: W. Engelmann, 289 pp. (page 62, Pristomyrmex in Myrmicinae)
- Emery, C. 1877b. Saggio di un ordinamento naturale dei Mirmicidei, e considerazioni sulla filogenesi delle formiche. Bull. Soc. Entomol. Ital. 9: 67-83 (page 81, Pristomyrmex in Myrmicidae, Myrmicidae)
- Emery, C. 1895l. Die Gattung Dorylus Fab. und die systematische Eintheilung der Formiciden. Zool. Jahrb. Abt. Syst. Geogr. Biol. Tiere 8: 685-778 (page 769, Pristomyrmex in Myrmicinae, Myrmicini)
- Emery, C. 1912b. Études sur les Myrmicinae. [I-IV.]. Ann. Soc. Entomol. Belg. 56: 94-105 (page 105, Pristomyrmex in Myrmicinae, Myrmecinini)
- Emery, C. 1914e. Intorno alla classificazione dei Myrmicinae. Rend. Sess. R. Accad. Sci. Ist. Bologna Cl. Sci. Fis. (n.s.) 18: 29-42 (page 41, Pristomyrmex in Myrmicinae, Myrmecinini)
- Emery, C. 1924f [1922]. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [concl.]. Genera Insectorum 174C: 207-397 (page 233, Pristomyrmex in Myrmicinae, Myrmecinini; Pristomyrmex senior synonym of Odontomyrmex)
- Forel, A. 1917. Cadre synoptique actuel de la faune universelle des fourmis. Bull. Soc. Vaudoise Sci. Nat. 51: 229-253 (page 244, Pristomyrmex in Myrmicinae, Myrmecinini)
- Hanisch, P.E., Sosa-Calvo, J., Schultz, T.R. 2022. The last piece of the puzzle? Phylogenetic position and natural history of the monotypic fungus-farming ant genus Paramycetophylax (Formicidae: Attini). Insect Systematics and Diversity 6 (1): 11:1-17 (doi:10.1093/isd/ixab029).
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- Wheeler, W. M. 1922i. Ants of the American Museum Congo expedition. A contribution to the myrmecology of Africa. VII. Keys to the genera and subgenera of ants. Bull. Am. Mus. Nat. Hist. 45: 631-710 (page 663, Pristomyrmex in Myrmicinae, Myrmecinini)
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