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Syllophopsis infusca
| Syllophopsis infusca | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Solenopsidini |
| Genus: | Syllophopsis |
| Species: | S. infusca |
| Binomial name | |
| Syllophopsis infusca (Heterick, 2006)
| |
Monomorium infuscum is known only from a few workers from three sites near Ambanizana, Toamasina Province. Samples have been collected from rotten wood, sifted leaf litter and pitfall trap, in rainforest. (Heterick 2006)
Identification
Similar to Syllophopsis aureorugosa (see there for identification details).
Keys including this Species
Distribution
Latitudinal Distribution Pattern
Latitudinal Range: -15.66666667° to -15.66666667°.
| North Temperate |
North Subtropical |
Tropical | South Subtropical |
South Temperate |
- Source: AntMaps
Distribution based on Regional Taxon Lists
Malagasy Region: Madagascar (type locality).
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Countries Occupied
| Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species. |
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Estimated Abundance
| Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species. |
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Biology
Castes
Worker
Images from AntWeb
  
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| Holotype of Syllophopsis infusca. Worker. Specimen code casent0173591. Photographer April Nobile, uploaded by California Academy of Sciences. | Owned by CAS, San Francisco, CA, USA. |
Queen
Images from AntWeb
   
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| Queen (alate/dealate). Specimen code casent0068856. Photographer Erin Prado, uploaded by California Academy of Sciences. | Owned by CAS, San Francisco, CA, USA. |
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- infusca. Monomorium infuscum Heterick, 2006: 176, fig. 28 (w.) MADAGASCAR.
- Type-material: holotype worker, 25 paratype workers.
- Type-locality: holotype Madagascar: Prov. Toamasina, 5.3 km. SSE Ambanizana, Andranobe, 15°40’S, 49°58’E, 425 m., 21.xi.1993, #926(43)-12, sifted litter (leaf mold, rotten wood), rainforest (B.L. Fisher); paratypes with same data.
- Type-depositories: CASC (holotype); ANIC, BMNH, CASC, MCZC (paratypes).
- Combination in Syllophopsis: Ward, et al. 2015: 73.
- Distribution: Madagascar.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Worker
Holotype: HML 3.22 HL 1.04 HW 0.98 CeI 94 SL 0.94 SI 96 PW 0.72.
HML 2.87–3.63 HL 0.96–1.16 HW 0.86–1.07 CeI 89–96 SL 0.86–1 00 SI 92–99 PW 0.63–0.78 (n=15).
HEAD: Head oval; vertex planar or weakly concave; frons shining and smooth except for piliferous pits; pilosity of frons a mixture of well-spaced, distinctly longer erect and semi-erect setae interspersed with shorter decumbent setae or setulae. Eye moderate, eye width 1–1.5× greatest width of antennal scape; (in full-face view) eyes set above midpoint of head capsule; (viewed in profile) eyes set around midline of head capsule; eye elliptical, curvature of inner eye margin may be more pronounced than that of its outer margin. Antennal segments 12; antennal club not clearly defined. Clypeal carinae always well-defined; anteromedian clypeal margin emarginate, clypeal carinae terminating in blunt angles, or, emarginate, clypeal carinae terminating in small denticles; paraclypeal setae moderately long and fine, curved; posteromedian clypeal margin approximately level with antennal fossae. Anterior tentorial pits situated nearer antennal fossae than mandibular insertions. Frontal lobes sinuate, divergent posteriad. Psammophore absent. Palp formula 2,2. Mandibular teeth five; mandibles triangular and smooth (except for piliferous pits); masticatory margin of mandibles approximately vertical or weakly oblique; basal tooth approximately same size as t4 (five teeth present).
MESOSOMA: Promesonotum shining, with whorls of rugae on sides of promesonotum, these becoming longitudinal on dorsum; (viewed in profile) promesonotum broadly convex; promesonotal setae greater than twelve; standing promesonotal setae a mixture of well-spaced, distinctly longer, erect and semi-erect setae which are curved distally and often paired, interspersed with much shorter, incurved, decumbent setae; appressed promesonotal setulae few, mainly on sides of promesonotum. Metanotal groove absent; propodeum shining, dorsum and sides of propodeum mainly smooth, with weak to strong striolae on declivitous face and on metapleuron; propodeal dorsum flat throughout most of its length; propodeum smoothly rounded or with indistinct angle; standing propodeal setae consisting of two or more prominent pairs anteriad, often with another pair of prominent setae posteriad, and other smaller setae on/around dorsal and declivitous surfaces of propodeum; appressed propodeal setulae very sparse or absent; propodeal spiracle equidistant from metanotal groove and declivitous face of propodeum. Vestibule of propodeal spiracle absent or not visible. Propodeal lobes present as sharp, acute angled flanges.
PETIOLE AND POSTPETIOLE: Petiolar spiracle lateral and situated slightly anteriad of petiolar node; node (viewed in profile) broad and thick, with short vertex anteriad, node sloping posteriad; appearance of node transversely rugose, shining between sculpture; ratio of greatest node breadth (viewed from front) to greatest node width (viewed in profile) between 1:1 and 3:4; anteroventral petiolar process present as a thin flange tapering posteriad; ventral petiolar lobe absent; height ratio of petiole to postpetiole about 4:3; height–length ratio of postpetiole between 1:1 and 3:4; postpetiole strongly rugose; postpetiolar sternite not depressed at midpoint, its anterior end an inconspicuous lip or small carina.
GASTER: Pilosity of first gastral tergite consisting of well-spaced, erect and semi-erect setae interspersed with a few appressed setulae.
GENERAL CHARACTERS: Color dark reddish- or yellowish-brown. Worker caste monomorphic.
Type Material
Holotype: worker, Prov. Toamasina, 5.3 km SSE Ambanizana, Andranobe, 15º40′S, 49º58′E 425 m 21.xi.1993 B.L. Fisher #926(43)–12/sifted litter (leaf mold, rotten wood) rainforest (California Academy of Sciences). Paratypes: Prov. Toamasina (all specimens with same collection data as holotype): 1 worker (Australian National Insect Collection); 12 workers (The Natural History Museum); 12 workers (Museum of Comparative Zoology).
Etymology
Latin ‘infuscus’ (‘dusky’ ‘dark brown’ ‘blackish’)
References
- Akbar, S.A., Bharti, H., Kanturski, M., Wachkoo, A.A. 2021. First record of the myrmicine ant genus Syllophopsis Santschi, 1915 (Hymenoptera: Formicidae) from India with description of a new species. Zootaxa 4985: 403-413 (doi:10.11646/zootaxa.4985.3.7).
- Heterick, B.E. 2006. A revision of the Malagasy ants belonging to genus Monomorium Mayr, 1855. Proceedings of the California Academy of Sciences. 57:69-202.
- Ward, P.S., Brady, S.G., Fisher, B.L., Schultz, T.R. 2015. The evolution of myrmicine ants: phylogeny and biogeography of a hyperdiverse ant clade (Hymenoptera: Formicidae). Systematic Entomology 40: 61–81 (doi:10.1111/syen.12090).