Camponotus aureopilus

Shattuck, S. O., 2005, Review of the Camponotus aureopilus species-group (Hymenoptera, Formicidae), including a second Camponotus with a metapleural gland., Zootaxa 903, pp. 1-20: 3-4

publication ID

20438

publication LSID

lsid:zoobank.org:pub:A9753CF6-9186-4039-8401-8533855C9158

persistent identifier

http://treatment.plazi.org/id/4C6C6CE9-C079-0DEA-F891-D7B4CCA261BA

treatment provided by

Christiana

scientific name

Camponotus aureopilus
status

 

The Camponotus aureopilus  HNS  Species-Group

Members of this species-group can be separated from most other species in the genus, and from all Old World species, by having either or both of the following characters: (1) head with an angle, ridge or strong inflection line running between the compound eye and the posterolateral corner, the area immediately below this ridge varying from weakly to strongly concave (Fig. 6); (2) the presence of numerous enlarged, closely spaced, elongate, finely barbed white or yellow hairs on the dorsum of the pronotum, mesonotum and/or gaster (Figs 24, 25). These hairs are found in dense groups and are present in all species with the exception of cyrtomyrmodes  HNS  (in this species the posterolateral section of the head is strongly ridged dorsally and concave laterally). When present, these hairs will immediately identify these taxa among Old World Camponotus  HNS  . A few New World species in the subgenera Manniella  HNS  , Myrmaphaenus  HNS  and Myrmeurynota  HNS  share these characters (for example, C. personatus  HNS  and C. sphaericus  HNS  ), but there is no evidence of close phylogenetic relationship between these two sets of taxa.

Donisthorpe (1936, 1941a, b), who described three of the species treated here, placed his species in the subgenus Myrmophyma  HNS  and, as noted below, Emery (1925) considered aureopilus  HNS  as belonging here as well. This is a South-east Asian and Australian subgenus containing just over 30 species (Bolton 1995). While not currently defined in any rigorous manner, all species share a similar head shape (straight-sided and either parallel or converging anteriorly) and either a compact, highly arched mesosoma (as in the aureopilus  HNS  group) or an elongate body with a low propodeum (as in ephippium (Smith)  HNS  and relatives).

The aureopilus  HNS  species-group, as treated here, is known to contain the following species:

aureopilus Viehmeyer  HNS 

velutinus Stitz  HNS  , new synonym

cyrtomyrmodes Donisthorpe  HNS 

densopilus  HNS  , new species

flavocrines Donisthorpe  HNS 

mussolinii Donisthorpe  HNS 

posteropilus  HNS  , new species

subpilus  HNS  , new species

thadeus  HNS  , new species

xanthopilus  HNS  , new species

Key to species of the Camponotus aureopilus  HNS  Group based on major and minor workers

1. Dorsum of mesosoma with fewer than 6 scattered hairs and lacking patches of enlarged hairs (Figs 5, 6); anterolateral pronotum projecting as a narrow ridge (Fig. 4)

................................................................................................................ cyrtomyrmodes  HNS 

- Dorsum of mesosoma and/or gaster with at least a small patch of enlarged hairs (Fig. 9); anterolateral pronotum rounded, not ridged (Fig. 1) ............................................... 2

2. Metapleural gland present above the hind leg (Figs 24, 26); enlarged hairs on dorsum of mesosoma bright yellow (Figs 23, 24) (Australia)......................................... thadeus  HNS 

- Metapleural gland absent (Fig. 9); enlarged hairs on dorsum of mesosoma white (Figs 14, 15) or pale yellow-white (Figs 8, 9) (Papua New Guinea).....................................3

3. Enlarged hairs absent from pronotum (but thin erect hairs present) (Figs 2, 3, 17, 18) 4

- Enlarged hairs present on pronotum (Figs 14, 15, 19, 20)............................................6

4. Enlarged hairs on gaster limited to a small central cluster (Figs 2, 3)........... aureopilus  HNS 

- Enlarged hairs on gaster covering entire dorsal surface (or nearly so) (Figs 17, 18)... 5

5. Erect hairs on dorsum of mesosoma abundant (Fig. 18); dorsal surface of head reticulo-punctate and with a matte appearance; enlarged hairs on gaster more extensive (Fig. 17)....................................................................................................... posteropilus  HNS 

- Erect hairs on dorsum of mesosoma fewer (Fig. 29); dorsal surface of head with very fine leather-like sculpturing and relatively shiny; enlarged hairs on gaster less numerous(Fig. 28) ................................................................................................. xanthopilus  HNS 

6. Enlarged hairs on pronotum covering the entire dorsal surface (Figs 14, 15) .............. 7

- Enlarged hairs on pronotum limited to a band along the central 1/3 of its width (Fig. 20) ....................................................................................................................................... 8

7. Enlarged pronotal hairs white (Figs 14, 15); pubescence on dorsum of head abundant and closely spaced (Fig. 13)............................................................................ mussolinii  HNS 

- Enlarged pronotal hairs pale (but distinctly) yellow (Figs 8, 9); pubescence on dorsum of head thin and widely spaced (Fig. 7) ......................................................... densopilus  HNS 

8. Dorsal surface of head with abundant, closely spaced pubescence; mesonotum strongly arched and dorsum of mesosoma forming a strong arch with the propodeum relatively low (similar to Fig. 6); dorsum of gaster golden yellow, lighter in color than mesosoma ...................................................................................................... flavocrines  HNS 

- Dorsal surface of head with scattered, widely spaced pubescence (Fig. 19); mesonotum weakly arched and dorsum of mesosoma forming a shallow arch with the propodeum relatively high (Fig. 21); dorsum of gaster the same colour as the mesosoma..... ............................................................................................................................ subpilus  HNS