Mayriella Forel

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 : 18-19

Mayriella Forel , 1902

Taxonomy. The genus Mayriella was established under the tribe Meranoplini by Forel (1902), but was placed in the Carebara genus group of the tribe Solenopsidini by Bolton (2003). The genus was recently revised by Shattuck & Barnett (2007). The worker of the single known Vietnamese species has the following features.

Worker monomorphic; head in full-face view subtrapezoidal; frontal lobe large; antennal scrobe very deep, surrounded dorsally by frontal carina and ventrally by genal carina; both carinae well developed and meeting at posterior end of antennal scrobe; median portion of clypeus behind anterior margin vertical or nearly vertical, terminating above in a projecting, bidentate appendage; median clypeal seta absent; posteromedian portion of clypeus inserted relatively broadly between frontal lobes; mandible with 4 teeth; antenna 10-segmented, with 2-segmented club; eye large and elongated, narrowed anteroventrally; mesosoma short and high; promesonotal dome flattened, slightly higher than anterior border of propodeal dorsum; humerus bluntly expanded anterolaterad; promesonotal suture absent dorsally; ventrolateral margin of promesonotum and anterior margin of mesopleuron forming flanges partly overhanging forecoxa; metanotal groove shallowly impressed dorsally; dorsum of propodeum declining posteriorly; propodeal spine elongate-triangular; propodeal lobe strongly expanded posterodorsad; petiole short but pedunculate, with high node; subpetiolar process well developed; postpetiole short; gastral shoulder well developed; dorsa of head and mesosoma with sparse, long, standing hairs.

The worker of Mayriella is somewhat similar to that of the Vietnamese species of Calyptomyrmex (for distinguishing features see notes under Calyptomyrmex ).

Vietnamese species. Only one species has been described from Vietnam: granulata Dlussky & Radchenko [= sp. eg-1; = sp. 1 of SKY: Yamane et al. 2005] (type locality: Bai Tu Long; other localities: Ba Be, Cuc Phuong, Phu Quoc, Tay Yen Tu, Van Ban).

Bionomics. Nests of M. granulata are found in rotting twigs, under stones and in the litter layer.