Cephalotes spinosus

A few stray workers were found in dense second growth with a few larger trees (Barinas, Venezuala). Nothing else is known about the biology of .

Identification
A member of the laminatus clade characterised in the worker by the unarmed mesonotum and by the golden hairs on the mesosoma, in the soldier by the broad gastral lamellae and by the unarmed mesonotum, and in the soldier and gyne by the frontal carinae orange and semi-transparent. (de Andrade and Baroni Urbani 1999)

Distribution based on Regional Taxon Lists
Neotropical Region: Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Trinidad and Tobago, Venezuela.

Nomenclature

 * . Cryptocerus spinosus Mayr, 1862: 761 (w.) BRAZIL (no state data).
 * Type-material: lectotype worker (by designation of Kempf, 1951: 187).
 * Type-locality: lectotype Brazil: Amazon River (“Im Gebiete des Amazonenstromes”) (no further data).
 * [Note: De Andrade & Baroni Urbani, 1999: 220, point out that the lectotype is labelled Pernambuco, and that there is a possible syntype soldier (in NHMW), with the same data. But Mayr, 1862: 763, implies that he had only a single specimen, saying it is possible that “the ant just described (C. punctatus) is the soldier and the previous (C. spinosus) is the worker of one and the same species”.]
 * Type-depository: NHMW.
 * Forel, 1911e: 260 (s.); Kempf, 1951: 187 (q.).
 * Combination in Cryptocerus (Paracryptocerus): Emery, 1915i: 192;
 * combination in Paracryptocerus: Kempf, 1951: 187;
 * combination in Zacryptocerus: Brandão, 1991: 388;
 * combination in Cephalotes: De Andrade & Baroni Urbani, 1999: 220.
 * Status as species: Mayr, 1863: 406; Roger, 1863b: 39; Smith, F. 1867: 526; Dalla Torre, 1893: 144; Emery, 1894c: 203; Forel, 1895b: 134; Forel, 1901h: 50; Wheeler, W.M. 1916c: 11; Mann, 1916: 450; Wheeler, W.M. 1918b: 26; Wheeler, W.M. 1922c: 11; Emery, 1924d: 307; Borgmeier, 1927c: 117; Kempf, 1951: 187 (redescription); Kempf, 1964b: 254; Kempf, 1967e: 361; Kempf, 1972a: 180; Brandão, 1991: 388; Bolton, 1995b: 427; De Andrade & Baroni Urbani, 1999: 220 (redescription); Bezděčková, et al. 2015: 116; Sandoval-Gómez & Sánchez-Restrepo, 2019: 914.
 * Senior synonym of peruvianus: Kempf, 1967e: 361; Kempf, 1972a: 180; Brandão, 1991: 388; Bolton, 1995b: 427; De Andrade & Baroni Urbani, 1999: 220.
 * Senior synonym of punctatus: Dalla Torre, 1893: 144; Emery, 1924d: 308; Borgmeier, 1927c: 117; Kempf, 1951: 187; Kempf, 1972a: 180; Brandão, 1991: 388; Bolton, 1995b: 427; De Andrade & Baroni Urbani, 1999: 220.
 * Distribution: Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Trinidad, Venezuela.
 * peruvianus. Cryptocerus laminatus subsp. peruvianus Forel, 1911c: 297 (s.) PERU.
 * Type-material: holotype soldier.
 * Type-locality: Peru: Chanchamayo, 1200 m..
 * Type-depository: MHNG.
 * Combination in Cryptocerus (Paracryptocerus): Emery, 1924d: 308;
 * combination in Paracryptocerus: Kempf, 1951: 191.
 * Subspecies of spinosus: Forel, 1911e: 260; Emery, 1924d: 308; Kempf, 1951: 191.
 * Junior synonym of spinosus: Kempf, 1967e: 361; Kempf, 1972a: 180; Brandão, 1991: 388; Bolton, 1995b: 427; De Andrade & Baroni Urbani, 1999: 220.
 * punctatus. Cryptocerus punctatus Mayr, 1862: 762 (s.) BRAZIL (no state data).
 * Type-material: holotype soldier.
 * Type-locality: Brazil: Amazon River (“Im Gebiete des Amazonenstromes”) (no further data).
 * Type-depository: NHMW.
 * Status as species: Mayr, 1863: 406; Roger, 1863b: 39; Smith, F. 1867: 526.
 * Junior synonym of spinosus: Dalla Torre, 1893: 144; Emery, 1924d: 308; Borgmeier, 1927c: 117; Kempf, 1951: 187; Kempf, 1972a: 180; Brandão, 1991: 388; Bolton, 1995b: 427; De Andrade & Baroni Urbani, 1999: 220.

Worker
Kempf (1951) - Length 5.2 mm. Median head length 1.29 mm; Weber's length of thorax 1 .68 mm. Black; the following yellowish-brown: frontal carinae, occipital lamellae, lamellate border of the first gastral tergite. Ferruginous: first and tip of terminal funicular segments, spines of thorax and peduncular segments, tips of femora, tibiae, fore tarsi, distal half of mid and hind tarsi.

Head subopaque, slightly broader than long, broadest behind the eyes, narrowed in front. Interocular distance subequal to maximum length of head (64:65). Posterior margin scarcely concave. Occipital angles with projecting, obliquely truncate lamellae, the apical border of which is sinuate. Cheeks strongly marginate beneath, densely covered with appressed, scale-like hairs. Upper and lower surface of head microscopically reticulate-punctate, sparsely covered with golden, slender, appressed scales. A few broader and canaliculate scales towards the occipital border.

Thorax subopaque. Anterior border moderately arcuate, shoulders angulate. Lateral border of pronotum with two subequal, strong, scarcely recurved and somewhat raised spines. Posterior corners of pronotum not projecting, confluent with the lateral border of the mesonotum. Promesonotal suture vestigial. Mesonotum unarmed at the sides. Thorax scarcely constricted laterad between mesonotum and epinotum. Mesoepinotal suture distinct and impressed. Basal face of epinotum, excluding the spines, about twice as long as broad, with two spines arising from its lateral border on each side. The anterior spine subequal to the prothoracic spines, the posterior spine very strong, twice as long, pointing sidewards and only slightly backwards. Microsculpture sharper, with superimposed, mostly longitudinal and rather dense rugosities on the dorsal face, between which lie rather dense, golden, canaliculate, appressed scales. Sides of thorax with longitudinal striae and sparse canaliculate scales. Declivity not excavated. Legs finely reticulate-punctate with simple, flattened hairs as on head.

Petiole subopaque, transverse, with distinctly set off, long, slender, apically recurved and rounded lateral spines, arising from the anterior corner. Postpetiole as long as, narrower than, the petiole, with shorter, broader and apically rounded lateral spines, curving obliquely forward. Sculpture of peduncle similar to head and gaster.

Gaster subopaque, cordiform, longer than broad. First gastral tergite with broad, anterolateral, transparent lamellae, the outer margin of which is slightly upturned; as broad as length of postpetiole. Tergites and sternites finely and rather sharply reticulate-punctate. Scales of gaster simple, sparse, becoming slightly denser towards the apex of the first tergite. Erect pile limited to 2d to 4th tergites and sternites.

de Andrade and Baroni Urbani (1999) - Measurements (in mm) and indices: TL 4.80-5.80; HL 1.16-1.44; HW 1.60-1.92; EL 0.35-0.43; PW 1.28-1.60; PeW 0.68-0.76; PpW 0.60-0.68; HBaL 0.56-0.60; HBaW 0.11-0.13; CI 133.3-137.9; PI 120.0-131.2; PPeI 168.4-210.5; PPpI 191.0-235.3; HBaI 17.8-21.6.

Soldier
Kempf (1951) - Length 7.6 mm. Median head length 1 .85 mm. Webers's length of thorax 2.22 mm. Black; the following ferruginous: frontal carinae, first funicular segment, tip of femora, tibiae apices of metatarsi, tarsi, apices of thoracic spines, peduncular spines. Lamellate border of gaster pale yellowish. Tip of last funicular segment orange.

Head subfulgid; subquadrangular, shorter than wide; anterior corners rounded; posterior corners slightly projecting in a short, stout, bluntly rounded tooth. Frontal carinae prolonged above the eyes in the form of a distinctly raised, carinule, fading out before reaching the occi pital corner. Upper surface of head moderately convex. Cheeks not distinctly marginate beneath. Eyes little convex. A distinct carina extends from beneath the eyes back to the occipital corner. Vertex with a pair of tuberculate swellings on the immarginate occipital border. Upper and lower surface of head finely punctate, more sparsely foveolate, foveolae on upper surface of head rounded, without conspicuous hair. Occiput smooth, fulgid, sparsely foveolate.

Thorax smooth and fulgid above, sides and declivous face of epinotum opaque, finely reticulate-punctate. Anterior border arcuate, shoulders subangulate, not well visible from above. Pronotum with a transverse crest, broadly interrupted mesad, ending laterad in a stout, apically rounded, short spine, projecting outward, another spine in front of this. Sides distinctly converging cephalad and caudad from the second spine. Promesonotum, in profile, greatly convex. Promesonotal suture distinct. Mesonotum on each side with a minute, inconspicuous denticule. Thorax greatly constricted between mesonotum and epinotum. Basal face of epinotum with a small triangular tooth laterad, and a large, stout, apically bluntly rounded spine, arising from the posterior corner, projecting outward and upward. Dorsum of thorax covered with rather dense, deeply impressed rounded setiferous foveolae; somewhat denser on basal face and upper third of declivous face of epinotum. Remainder of declivous face and sides of thorax without any conspicuous macrosculpture.

Petiole transverse, with a long, very slender, apically obtuse, slightly recurved spine on each side. Postpetiole with plate-like broad, rounded, lateral projection on each side. Both segments finely reticulate-punctate, opaque.

Gaster subfulgid, subcordiform, finely and densely punctured with sparse, very shallow, vestigial foveolae. Anterolateral border of first gastral tergite with a subtranslucid, excavated broad lamellate crest, as in worker.

Pilosity scarcer than in worker. All foveolae except the ones on the upper surface of head, contain a small, distinctly visible, decumbent, flat seta, which is more or less glistening on epinotum. Gaster with minute appressed setulae. Erect pile confined to the apical portion of the gaster as in other species.

de Andrade and Baroni Urbani (1999) - Measurements (in mm) and indices: TL 6.62-8.00; HL 1.66-2.04; HW 2.28-2.72; EL 0.50-0.52; PW 1.84-2.32; PeW 0.91-0.96; PpW 0.80-0.90; HBaL 0.68-0.72; HBaW 0.16-0.19; CI 131.4-137.3; PI 115.5-123.9; PPeI 191.7-254.9; PPpI 224.4-260.7; HBal 22.2-26.4.

Queen
de Andrade and Baroni Urbani (1999) - Head almost round, dorsally convex. Frontal carinae surpassing the posterior border of the eyes posteriorly as a thin margin. Vertexal angles with a pair of small, triangular teeth. Vertex with a pair of small, median, stout teeth. Clypeus concave anteriorly and with a pair of small lateral denticles. Eyes convex. Mandibles broad, without tumulus and denticles.

Mesosoma. Scapular angles visible in dorsal view. Humeral angles with a pair of pointed anterior spines. Pronotal carina superficially marked, interrupted in the middle, and absent laterally in some specimens. Mesonotum and scutellum flat. Lower mesopleurae with a variably developed, stout tooth. Sides of the basal face of the propodeum with or without a small pair of swellings followed by a long spine directed backwards; sides of the declivous face converging posteriorly.

Petiole with the anterior face concave and oblique medially; petiolar sides gently diverging posteriorly, unarmed or with a small pair of denticles medially. Postpetiole broadly convex dorsally; sides of the postpetiole with stout and round expansions.

Gaster anteriorly with a pair of broad, variably protruding, marginate lobes.

Legs. Fore coxae tumuliform anteriorly. Mid and hind femora not angulate. Hind basitarsi not flat and with almost parallel sides.

Sculpture. Head dorsum minutely and superficially reticulate-punctuate and with small, variably clumped, superficial foveae. Venlral face of the head, pronotum and scutellum smooth and with dense, deep, foveae larger than their interspaces; propleurae with similar sculpture but more impressed and superficially reticulate. Mesonotum smooth and with sparse, shallow foveae. Basal face and anterior half of the declivous face of the propodeum, upper metapleurae, petiolar sides and postpetiole with dense, deep, slightly irregular foveae. Lower meso- and metapleurae reticulate and with variably clumped foveae. Posterior half of the declivous face of the propodeum reticulate. Gaster smooth or superficially reticulate. Anterior third of the first gastral tergite with sparse, superficial foveae. Legs reticulate. Extensor face of the tibiae with small, irregular foveae.

Pilosity. Body with four type of hairs: (1) short, thin, appressed originating from a fovea on the head and on the mesosoma, or arising from very superficial foveae on the gaster and on the legs; (2) long, rare, slightly clavate on the pronotal sides, on the pedicel, on the first tergite and on the legs; (3) similar to type (2) but truncate on the remaining tergites; (4) long, dense and pointed on the sternites.

Colour. Black, slightly shining. Frontal carinae yellow-orange and transparent. Femora dark orange. Gaster with two pairs of yellow spots, one on the anterior third and the other larger and on the posterior third.

Measurements (in mm) and indices: TL 11.58-12.06; HL 2.12-2.34; HW 2.68-2.84; EL 0.56; PW 2.48-2.60; PeW 1.04-1.28; PpW 1.36-1.40; HBaL 0.80-0.87; HBaW 0.20-0.24; CI 121.4-126.4; PI 108.1-109.2; PPeI 203.1-238.5; PPpl 182.3-185.7; HBal 25.0-27.6.

Type Material
de Andrade and Baroni Urbani (1999):

Worker. Type locality: Amazon River (Brazil). Type material: Lectotype worker in (Kempf, 1951: 187), labeled "Pernambuco, Coll. G. Mayr, spinosus G. Mayr, Type", examined and one syntype worker, same data and same collection as the lectotype, equally in NHMW, examined.

Cryptocerus punctatus. Soldier. Type locality: Amazon River (Brazil). Type material: not available for the present study.

Cryptocerus laminatus peruvianus. Solider. Type locality: Chanchamayo, 1200 m (Peru). Type material: one soldier labelled: "Chanchamayo X, Peru, 1200 m; Cryptocerus spinosus Mayr r. peruvianus Forel, soldier type; r. Cr. Peruvianus Forel; Paracryptocerus spinosus peruvianus Forel = spinosus Mayr, Kempf, 1967".

References based on Global Ant Biodiversity Informatics

 * Alonso L. E., J. Persaud, and A. Williams. 2016. Biodiversity assessment survey of the south Rupununi Savannah, Guyana. BAT Survey Report No.1, 306 pages.
 * Brandao, C.R.F. 1991. Adendos ao catalogo abreviado das formigas da regiao neotropical (Hymenoptera: Formicidae). Rev. Bras. Entomol. 35: 319-412.
 * Emery C. 1894. Studi sulle formiche della fauna neotropica. VI-XVI. Bullettino della Società Entomologica Italiana 26: 137-241.
 * Escalante Gutiérrez J. A. 1993. Especies de hormigas conocidas del Perú (Hymenoptera: Formicidae). Revista Peruana de Entomología 34:1-13.
 * Fernández F., and E. E. Palacio. 1995. Hormigas de Colombia IV: nuevos registros de géneros y especies. Caldasia 17: 587-596.
 * Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
 * Forel A. 1901. Formiciden des Naturhistorischen Museums zu Hamburg. Neue Calyptomyrmex-, Dacryon-, Podomyrma- und Echinopla-Arten. Mitt. Naturhist. Mus. Hambg. 18: 43-82.
 * Forel A. 1911. Ameisen des Herrn Prof. v. Ihering aus Brasilien (Sao Paulo usw.) nebst einigen anderen aus Südamerika und Afrika (Hym.). Deutsche Entomologische Zeitschrift 1911: 285-312.
 * Franco W., N. Ladino, J. H. C. Delabie, A. Dejean, J. Orivel, M. Fichaux, S. Groc, M. Leponce, and R. M. Feitosa. 2019. First checklist of the ants (Hymenoptera: Formicidae) of French Guiana. Zootaxa 4674(5): 509-543.
 * Jaffe K., P. Horchler, M. Verghaagh, C. Gomez, R. Sievert, R. Jaffe, and W. Morawetz. 2007. Comparing the ant fauna in a tropical and a temperate forest canopy. Ecotropicos 20(2): 74-81.
 * Jaffe, K., et al. 2007. Comparing the ant fauna in a tropical and a temperat forest canopy. Ecotropicos 20(2):74-81
 * Kempf W. W. 1951. A taxonomic study on the ant tribe Cephalotini (Hymenoptera: Formicidae). Revista de Entomologia (Rio de Janeiro) 22:1-244
 * Kempf W. W. 1964. Additions to the knowledge of the Cephalotini ants (Hymenoptera, Formicidae). Papeis Avulsos de Zoologia (São Paulo) 16: 243-255.
 * Kempf W. W. 1967. A new revisionary note on the genus Paracryptocerus Emery (Hym. Formicidae). Studia Entomologica 10: 361-368.
 * Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
 * Kusnezov N. 1953. La fauna mirmecológica de Bolivia. Folia Universitaria. Cochabamba 6: 211-229.
 * Lopes M. C., G. P. A. Lamarre, C. Baraloto, P. V. A. Fine, A. Vincentini, and F. B. Baccaro. 2019. The Amazonas-trap: a new method for sampling plant-inhabiting arthropod communities in tropical forest understory. Entomologia Experimentalis et Applicata https://doi.org/10.1111/eea.12797
 * Miranda P. N., F. B. Baccaro, E. F. Morato, M. A. Oliveira. J. H. C. Delabie. 2017. Limited effects of low-intensity forest management on ant assemblages in southwestern Amazonian forests. Biodivers. Conserv. DOI 10.1007/s10531-017-1368-y
 * Salinas P. J. 2010. Catalogue of the ants of the Táchira State, Venezuela, with notes on their biodiversity, biogeography and ecology (Hymenoptera: Formicidae: Amblyioponinae, Ponerinae, Proceratiinae, Myrmicinae, Ecitoninae, Formicinae, Pseudomyrmecinae, Dolichoderinae). Boletín de la SEA 47: 315-328.
 * Wheeler W. M. 1916. Ants collected in British Guiana by the expedition of the American Museum of Natural History during 1911. Bulletin of the American Museum of Natural History 35: 1-14.
 * Wheeler W. M. 1918. Ants collected in British Guiana by Mr. C. William Beebe. Journal of the New York Entomological Society 26: 23-28.
 * Wheeler W. M. 1922. The ants of Trinidad. American Museum Novitates 45: 1-16.
 * de Andrade, M.L. & C. Baroni Urbani. 1999. Diversity and Adaptation in the ant genus Cephalotes, past and present. Stuttgarter Beitrage zur Naturkunde Serie B 271. 893 pages, Stuttgart