Plump Humpback Crab Spider
This common thomisid is not a true Tmarus as its male and female genitalia differ significantly from those of Tmarus piger (Walckenaer, 1802), the designated representative of the genus. The female also differs from those of T. piger and Tmarus spp. A and B by lacking a tubercle at the posterior end of abdomen above the spinnerets, another characteristic associated with Tmarus. As it cannot be placed under any of the known thomisid genera, it is provisionally parked under the genus Tmarus purely on the basis that the male is superficially similar to that of T. piger.
The female is recognised by the many dimple-like follicles on a plump abdomen. The male differs from the female by having a median pale band on the carapace, a slender abdomen, and longer legs. In both sexes, the posterior dorsum is marked by short, discontinuous, white transverse stripes.
| Length | 4–5 mm; 3–4 mm |
| Distribution | Singapore. |
| Habitat | Among herbage and shrubbery in gardens, roadside hedges, open parkland, abandoned farms and plantations, and in coastal vegetation. |
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Singapore.