Pentagonal Runcinia
This species is readily distinguished from other Runcinia in Singapore by the pentagonal shape of the abdomen in both sexes. Instead of having a straight ridge separating the anterior and posterior eyes as in other Runcinia in Singapore, the ridge in this species is recurved.
| Length | ♀ 5–6 mm (after egg-laying); ♂ 4 mm |
| Distribution | Singapore. |
| Habitat | Waterside vegetation. |
| Biology | Preys on insects living near water. The female guards a tightly woven white egg sac webbed on the upper foliage of rushes, sedges, and other semi-submerged aquatic plants. |
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Singapore.