Crematogaster onusta

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Crematogaster onusta
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Crematogaster
Species: C. onusta
Binomial name
Crematogaster onusta
Stitz, 1925

Crematogaster onusta casent0193714 p 1 high.jpg

Crematogaster onusta casent0193714 d 1 high.jpg

Specimen Labels

A specimen from Borneo was found in primary lowland forest.

Identification

A member of the subgenus Physocrema. Hosoishi and Ogata (2009) - This species is very similar to Crematogaster physothorax, but can be distinguished by the rugulae on the pronotum. This species was transferred to Paracrema by Donisthorpe (1941), but is here replaced in Physocrema.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo, Indonesia, Malaysia, Philippines (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • onusta. Crematogaster (Physocrema) onusta Stitz, 1925: 118 (w.) PHILIPPINES. Combination in C. (Paracrema): Donisthorpe, 1941l: 226. See also: Hosoishi & Ogata, 2009b: 26.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Hosoishi and Ogata (2009) - HW 0.82–1.05; HL 0.76–0.95; CI 109–111; SL 0.66–0.85; SI 80–81; EL 0.18–0.22; PW 0.46–0.51; WL 1–1.22; PSL 0; PtL 0.28–0.34; PtW 0.22–0.26; PtH 0.14–0.16; PpL 0.16–0.19; PpW 0.2–0.24; PtHI 42–52; PtWI 67–86; PpWI 125–129; WI 94–100 (Three workers measured).

Workers monomorphic in size.

Scape reaching posterior corner of head.

In lateral view, pronotum and mesonotum forming a single convexity; propodeum slightly raised relative to promesonotum. Anterior margin of pronotal collar slightly concave in dorsal view. Metanotal groove almost straight in dorsal view, not so deep and situated posterior to the posterior ridge of pronotum in lateral view; thorax not strongly constricted in middle in dorsal view. In dorsal view, several longitudinal rugulae connecting between mesonotum and propodeum; the boundary indistinct. Propodeal spiracle situated near the metapleural gland orifice, the distance between them about the same as the propodeal spiracle diameter. Propodeal spines absent.

Clypeus sculptured with longitudinal rugulae. Pronotum punctate, but without distinct rugulae.

Standing pilosity sparse, a few pairs on dorsal face of head and dorsal portion of mesonotum. Dorsal face of head with decumbent setae. Clypeus with setae. Fourth abdominal tergite with decumbent setae.

Body color varies from red (specimens from Tioman Island) to brown (specimens from other localities).

Type Material

Hosoishi and Ogata (2009) - LECTOTYPE worker (Berlin Museum für Naturkunde der Humboldt-Universität worker, GBIF-D/FoCol 1439) (by present designation) and seven paralectotype workers from PHILIPPINES: Palawan (G. Boettcher) (Museum of Comparative Zoology, ZMHB) [examined].

References