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Camponotus chrislaini
| Camponotus chrislaini | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Formicinae |
| Tribe: | Camponotini |
| Genus: | Camponotus |
| Subgenus: | Mayria |
| Species group: | efitra |
| Species: | C. chrislaini |
| Binomial name | |
| Camponotus chrislaini Rasoamanana & Fisher, 2022
| |
Primarily collected from rotten logs, sifted litter, inside trees, or on branches above ground.
Identification
Rasoamanana and Fisher (2022) - A member of the Camponotus efitra species group. Camponotus chrislaini can be easily distinguished from the other members of the efitra group by its mostly smooth and shiny sculpture; head more or less globose in full-face view; sigmoid frontal carina, and wavy propodeum dorsum.
The new species is easily distinguishable from the Mayria species, but morphologically is most similar to the unidentified species Camponotus MG098 from subgenus Myrmonesites. The main character used to distinguish them is the form of the petiolar scale, as in the former the petiole is much thinner and its dorsal face forms a straight surface, while in the latter the petiole is thickened with the posterior face concave in dorsal view. Camponotus MG098 is also covered with plentiful setae which are scarce and widely distributed in C. chrislaini. The presence of C. chrislaini and C. MG098 in six localities (Sakaramy, Binara, Antsahabe, Analamerana-Ankavanana, Galoko, and Mont Kalabenono) suggests that they are reproductively isolated.
Keys including this Species
Distribution
Camponotus chrislaini is restricted to the northern portion of Madagascar.
Latitudinal Distribution Pattern
Latitudinal Range: -13° to -13°.
| North Temperate |
North Subtropical |
Tropical | South Subtropical |
South Temperate |
- Source: Rasoamanana & Fisher, 2022
Distribution based on Regional Taxon Lists
Malagasy Region: Madagascar (type locality).
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Habitat
Prefers dry (tropical dry forest, dry forest, disturbed dry forest) as well as wet (montane forest and rainforest) habitats at moderate altitudes (below 1000 m).
Biology
Castes
Worker
Major
 CASENT0243690 / Erin Prado / from www.antweb.org |
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- chrislaini. Camponotus chrislaini Rasoamanana & Fisher, 2022: 200, figs. 2D, 7C-D, 41D, 59 (s.w.) MADAGASCAR.
- Type-material: holotype worker, 9 paratype workers.
- Type-locality: holotype Madagascar: Antsiranana, Forêt d’Andavakoera, 21.4 km. 75° ENE Ambilobe, 4.6 km. 356° N Betsiaka, -13.11833, 49.23, 425 m., 16.xii.2003, BLF10296 (B.L. Fisher); paratypes with same data.
- Type-depository: CASC.
- Combination in C. (Mayria): Rasoamanana & Fisher, 2022: 200.
- 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
Medium-sized species. Absolute cephalic size (CS: 0.95 ± 0.17; 0.87–1.02). In full-face view, head ovoid (CWb/CL: 0.34±0.03; 0.32–0.35); posterior margin rounded, lateral margin of head convex. Eyes circular, protruding, placed midway from the occipital corner (PoOC/CL: 0.12±0.03; 0.11–0.13). Mandibles triangular with five teeth. Clypeus transversally trapezoidal, its anterior border broadly rounded, not angular. With head in full-face view, anterior clypeal margin rounded, not projecting (ClyL/GPD: 0.26±0.03, 0.25–0.29). Antennal scape flattened and lobulated at the base, long, surpassing the occiput by the length of three basal funiculi (SL/CS: 0.46±0.03; 0.45–0.48). In lateral view, anterodorsal corner of pronotum tuberculate, pronotal suture distinct, mesonotal suture distinctly impressed so that the anterior portion of propodeum is raised to a blunt edge in profile, and suture forms a concavity (MW/ML: 0.22±0.02, 0.21–0.23; MPH/ML: 0.17±0.02, 0.17–0.18). In lateral view, petiolar node nodiform, higher than long. Entire body, including mandible, smooth and shiny. One pair of standing hairs on angle formed by mesonotal dorsum and propodeum, head with scattered, subdecumbent, filiform brown hairs, scape with decumbent setae. Ant brownish; mandible, clypeus, and pronotum light brown; mid- and forecoxae, apical femora, basal tibiae, and apical portion of third and fourth tergite whitish.
Major
Characteristics of minor workers, except: head quadrate with straight margins (CS: 1.67±0.06, 1.57–1.74; CWb/CL: 0.92±0.03, 0.90–0.96). Eyes circular, closed to the lateral margin (PoOC/CL: 0.29±0.02, 0.27–0.31). In profile, clypeus distinctly truncate (ClyL/GPD: 0.92±0.03, 0.86–0.94), its anterior margin with a short concavity in full-face view. Antennal scape same as minor but short, just reaching the occipital border (SL/CS: 0.77±0.04, 0.74–0.83). Promesonotum forms a unique dome followed by an impressed mesonotal suture, dorsum of propodeum slightly concave near the propodeal angle. Anterior portion of head with widely spaced large punctures, a single puncture in the center of the vertex. Filiform brownish hair present on head and mesosoma dorsum, more abundant on malar area.
Type Material
Holotype worker - Madagascar, Province Antsiranana, Forêt d’Andavakoera, 21.4 km 75° ENE Ambilobe; 4.6 km 356° N Betsiaka, –13.11833, 49.23, 425 m, rainforest, ex rotten log, 16 December 2003 (BLF), collection code: BLF10296, specimen code: CASENT0498999 (CASC). Paratypes. Nine workers with the same data as holotype, CASENT0499000, CASENT0499001, CASENT0499002 (three workers in each pin) (CASC).