Thrandina

Thrandina is a genus of jumping spiders, with three species found in Ecuador.[1] It is unique among New World salticids in having strikingly large posterior median eyes.[2]

Thrandina
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Subphylum:
Chelicerata
Class:
Arachnida
Order:
Araneae
Infraorder:
Araneomorphae
Family:
Salticidae
Genus:
Thrandina

Maddison, 2006
Diversity
3 species

Description

Thrandina and its sister genus Galianora share the ancestral salticid traits of a tarsal claw on the female palpus and a median apophysis on the male palp. This is rare among neotropical salticids. Both genera are informally grouped as "lapsiines", together with Lapsias. However, the shared basal characteristics with Lapsias could be symplesiomorphic.[2]

Males of Thrandina parocula are about 4 millimetres (0.16 in) long. Their carapace is dark brown to black, except for a central pale longitudinal stripe on the thorax. The legs are pale to medium brown, with a darker femur I. The abdomen is medium brown with lighter chevrons above, and pale below with dark speckles. The female is slightly smaller with a bodylength of 3.6 millimetres (0.14 in). It looks like the male, but with more annulate legs.[2]

Thrandina parocula was collected from moss-covered branches and tree-trunks in the understory of moist forests at elevations of 1,000 metres (3,300 ft) and higher, up to 2,270 metres (7,450 ft). Males walk fluid but hesitantly, frequently pausing and then raising and lowering.their first two pairs of legs in synchrony. A similar gait is observed in Spartaeinae.[2]

Species
  • Thrandina bellavista (Maddison, 2012)
  • Thrandina cosanga (Maddison, 2012)
  • Thrandina parocula (Maddison, 2006)[3]

Name

The genus is a contraction of Thranduil, the king of Mirkwood elves in J.R.R. Tolkien's mythology, which, as Thrandina, inhabit shady forests, and andina, referring to the Andean habitat.[2]

The species name refers to the relatively equal sizes of the lateral and posterior eyes.

Footnotes
  1. Maddison, Wayne P. (15 August 2012). "Five new species of lapsiine jumping spiders from Ecuador (Araneae: Salticidae)" (PDF). Zootaxa. 3424: 51–65. doi:10.11646/zootaxa.3424.1.3. Retrieved 30 September 2012.
  2. Maddison 2006
  3. "Search a taxon". Global Species Database of Salticidae. Retrieved 30 September 2012.
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References
  • Maddison, Wayne P. (2006): New lapsiine jumping spiders from Ecuador (Araneae: Salticidae). Zootaxa 1255: 17-28. PDF (with picture of male)
  • Platnick, Norman I. (2007): The world spider catalog, version 8.0. American Museum of Natural History.


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