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Camponotus karsti
| Camponotus karsti | |
|---|---|
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Formicinae |
| Tribe: | Camponotini |
| Genus: | Camponotus |
| Subgenus: | Myrmosaga |
| Species: | C. karsti |
| Binomial name | |
| Camponotus karsti Rakotonirina & Fisher, 2022
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The distribution of C. karsti is limited to the dry forest of the RS Ankarana in the north of Madagascar. Nest site for this species is unknown, but foraging is carried out on lower portions of vegetation.
Identification
Rakotonirina and Fisher (2022) - With head in full-face view, eye not breaking lateral cephalic margin; mesonotum short and lacking constriction; promesonotum an even convexity; propodeum with blunt angle at ca. posterior 1/2; anterior margin of petiolar node in profile very low, dorsal surface noticeably horizontal, ca. 2 × as long as posterior surface.
Camponotus karsti can be confounded with Camponotus harenarum because both species are characterized by the presence of a blunt angle at approximately the posterior 1/2 of propodeal dorsum. However, C. harenarum can be distinguished by the separate convexity of its mesonotum and anterior 1/2 of propodeum, and its petiolar node is approximately as high as long.
Keys including this Species
Distribution
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
Known only from the minor caste.
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- karsti. Camponotus karsti Rakotonirina & Fisher, 2022: 118, figs. 5A, 62 (w.) MADAGASCAR.
- Type-material: holotype minor worker, 1 paratype minor worker.
- Type-locality: holotype Madagascar: Antsiranana, RS Ankarana, 7 km. SE Matsaborimanga, -12.9, 49.11667, 150 m., 27.xi.1990, PSW11005 (P.S. Ward); paratype with same data.
- Type-depository: CASC.
- 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
Morphological measurements: see Appendix 1 and Ratios of morphometric data for majors and minors
Minor With head in full-face view, lateral margins anterior to eye level approximately parallel, progressively rounding evenly towards slightly concave rear margin; eye protruding and large (EL/CL: 0.26±0.01; 0.25–0.26), not breaking lateral cephalic margin, location of its posterior margin at posterior 1/4 of head (PoOc/CL: 0.26±0.01; 0.25–0.27); frontal carinae parallel, not widely opened posteriorly (FR/CS: 0.25); clypeus with blunt or poorly defined anterolateral angle, anteromedian margin broadly convex; two apical teeth of mandible normally spaced; antennal scape relatively long (SL/CS: 1.65±0.03; 1.63–1.67). Promesonotum noticeably convex, followed by a slightly visible metanotal groove; anterior portion of propodeal dorsum sloping along its first 1/2 then slightly convex and rounding to declivity surface. Anterior margin of petiolar node ca. 1/2 height of posterior margin, dorsal margin separated by an angle from anterior margin and inclined posteriorly to jointly rounding to posterior margin.
First and second gastral tergites without a pair of white spots; erect hairs on lateral margin of head present on anterior and behind eye level; posterior margin of head with two elongate, erect hairs; antennal scape covered with appressed hairs; junction of propodeal dorsum and declivity with two pairs of erect hairs.
Type Material
- Holotype worker. MADAGASCAR: Province Antsiranana: RS Ankarana, 7 km SE Matsaborimanga, -12.9, 49.11667, 150 m, tropical dry forest, low vegetation, 27 Nov 1990 (P.S. Ward) collection code: PSW11005, specimen code: CASENT0217292 (CAS).
- Paratype. 1 minor worker with same data as holotype but respectively specimen coded as: CASENT0837940 (CAS).
Etymology
The species name karsti is a non-Latin singular noun used in apposition.