Crematogaster angulosa 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 angulosa André

Crematogaster angulosa (André, 1896)

Type material examined

Crematogaster angulosa André. Holotype, 1 worker, Borneo (E. André) (MNHN).

Worker measurements (n=1)

HL 0.81, HW 0.78, EL 0.17, SL 0.57, WL 0.97, MTW 0.46, LHT 0.66, DPW 0.22, DPPW 0.21, CI 0.96, SI 0.73, REL 0.21, PI 1.01, RLEG 0.68 LPS 0.17 (TL 3.0)

Description of worker

Colour uniformly medium brown. Head and gaster shiny and with smooth surface, propodeum slightly striated. All body parts bear appressed pubescent hairs. Long flexuous setae present on head, gaster and abdomen. Head subquadratic but slightly elongated, being longer than wide and only slightly convex on sides. Anterior clypeal margin slightly convex and with a row of long erect hairs projecting anteriorly. Antennae relatively long in comparison to head width (SI 0.73) and covered in short pubescent hair. Terminal three funicular segments form a distinct club. Compound eyes elliptically shaped and not protruding over margin of head in full face view.

Metanotal groove distinctly visible and more pronounced than in the Macaranga -associated Decacrema species.Propodeal spines long, acute and thin (see Fig. S2.1A and S2.1B). In dorsal view petiole and postpetiole round in shape, with petiole being slightly more elongate than postpetiole. Petiole slightly wider than the postpetiole. Femur distinctly thicker than other parts of legs.

In dorsal view petiole and postpetiole round in shape. In lateral view the anterior face of the petiolar node flattened and sloping downwards anteriorly and petiole longer than postpetiole. Dorsal surface of the postpetiolar node in profile rounded, lateral nodes visible. Anteroventral tooth of petiole present.