Crematogaster biformis André

Heike Feldhaar, Ulrich Maschwitz & Brigitte Fiala, 2016, Taxonomic Revision of the Obligate Plant-Ants of the Genus Crematogaster Lund (Hymenoptera: Formicidae: Myrmicinae), Associated with Macaranga Thouars (Euphorbiaceae) on Borneo and the Malay Peninsula, Sociobiology 63 (1), pp. 651-681 : 681

Crematogaster biformis André

C. biformis (André, 1892)

Material examined

C. biformis André. 1 worker, Borneo Forel (MHNG)

Worker measurements (minor worker) (n=1)

HL 0.85, HW 0.85, EL 0.15, SL 0.55, WL 0.9, MTW --, LHT 0.55, DPW 0.23, DPPW 0.22, CI 1.0, SI 0.64, REL 0.18, PI 1.03, RLEG 0.61, LPS 0.13 (TL 3.0)

Description of worker

Workers of Crematogaster biformis are dimorphic, with minor and major workers. Colour of workers uniformly dark brown. All body parts bear long erect hairs, including the legs. Head subquadratic, as wide as long. Short propodeal spines are present in minor worker but absent in major worker (Fig. S2.2A and S2.2B, lateral view of alitrunk). The metanotal groove is distinctly visible and more pronounced than in the Macaranga -associated Decacrema species. Terminal three funicular segments form a distinct club. In dorsal view petiole round to trapezoid and postpetiole round in shape. In lateral view the anterior face of the petiolar node flattened and sloping downwards anteriorly. Petiole longer than postpetiole. Dorsal surface of the postpetiolar node in profile rounded. Anteroventral tooth of petiole present but rounded.