Acanthomyrmex Emery

Eguchi, K., Viet, B. T. & Yamane, S., 2011, Generic synopsis of the Formicidae of Vietnam (Insecta: Hymenoptera), Part I - Myrmicinae and Pseudomyrmicinae., Zootaxa 2878, pp. 1-61 : 11

publication ID

23462

DOI

https://doi.org/10.5281/zenodo.6182463

persistent identifier

https://treatment.plazi.org/id/3A068FC3-1F76-517F-E01E-031A8BE0E650

treatment provided by

Donat

scientific name

Acanthomyrmex Emery
status

 

Acanthomyrmex Emery View in CoL View at ENA   HNS , 1893

Taxonomy. The genus Acanthomyrmex   HNS is assigned to the tribe Myrmecinini   HNS together with Myrmecina, Perissomyrmex   HNS and Pristomyrmex   HNS (Bolton 2003). Workers of Vietnamese species have the following features (see also Moffett 1986; Eguchi et al. 2008).

Worker dimorphic; frontal lobe reduced, in full-face view only partially concealing the torulus; frontal carina present, usually conspicuous; antennal scrobe present, usually conspicuous; anteromedian margin of clypeus weakly convex with a shallow median emargination in major; anteromedian margin of clypeus always armed with 2 to several processes in minor; median clypeal seta reduced or absent in major, but always present in minor; lateral portions of clypeus not forming a conspicuous ridge in front of torulus in major, but raised into a ridge in front of torulus in minor; mandible in major massive, edentate or armed with a few indistinct teeth on masticatory margin; mandible in minor broadly triangular, and armed with 5-10 small to tiny teeth in addition to relatively conspicuous apical and preapical teeth; antenna 12-segmented, with 3-segmented club; eye moderately developed; mesosoma short and robust especially in major; promesonotal suture absent dorsally; metanotal groove obsolete or shallow dorsally; propodeum armed with a pair of long spines; propodeal lobe well developed, angulately produced posterodorsad; petiole pedunculate anteriorly and with distinct node; postpetiole much shorter than petiole; suture between first gastral tergite and sternite basally in the form of a rounded M-shape; postpetiole articulated at base of the M.

The minor worker of Acanthomyrmex   HNS is similar to the worker of Pristomyrmex   HNS , but in the latter the antenna is 11-segmented, the masticatory margin of the mandible is almost vertical to the basal margin and 3-, 4- or 5-toothed, and the suture between first gastral tergite and sternite is not in the form of a rounded M-shape.

Vietnamese species. One species described from Vietnam: humilis Eguchi, Bui & Yamane   HNS (type locality: Nam Cat Tien) and a second species recognized by us from Vietnam: glabfemoralis Zhou & Zheng   HNS (Chua Yen Tu, Cuc Phuong, Ky Thuong, Pu Mat, Tay Yen Tu, Van Ban).

Bionomics. Acanthomyrmex   HNS species nest in dead twigs and wood fragments, and under or between stones. Colonies of A. glabfemoralis   HNS contain a single dealate normal queen, or instead contain single or multiple dwarf queens, while colonies of A. humilis   HNS contain ergatoids only (Eguchi et al. 2008). Acanthomyrmex glabfemoralis   HNS and A. humilis   HNS gather seeds (Eguchi et al. 2004, Eguchi pers. observ.).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

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