New Trilacuna species from Thailand, Malaysia and Sumatra (Araneae, Oonopidae)
Eichenberger, Beata
Kranz-Baltensperger, Yvonne
Zootaxa
2011
2011-04-18
2823
1
31
7D65T
Eichenberger
Eichenberger
[151,547,619,646]
Arachnida
Oonopidae
Trilacuna
Animalia
Araneae
9
10
Arthropoda
species
clarissa
sp. nov.
Type material: Holotypemale ( PBI_OON 00012418): Sumatra: West Sumatra Province: Rimbo Panti Nature Reserve, about 30 kmN of Lubuksikaping, 0°20'46"N, 100°04'09"E, 300–400 m, primary forest, 11/13 June2006, leg. P. Schwendinger, deposited in MHNG. 1 male paratype( PBI_OON 00031971), collected with holotype, deposited in MHNG. 1 male paratype(PBI_OON 00031972), collected with holotype, deposited in MHNG. 1 male paratype( PBI_OON 00031973), collected with holotype, deposited in NMBE.
Etymology: The species epithet refers to the name of Agatha Christie, born as Agatha Mary ClarissaMiller, who was a brilliant and famous English author of novels, short stories and plays.
Diagnosis: This species can be distinguished from all other Trilacunaspecies by the sternum surface with relatively small, ovoid pits (figs. 7. D, F, H) and abundant, evenly scattered, plumose setae (fig. 7. H).
Description: Description based on 4 males(plus 2 malesfor SEM). MALE: Body length 1.1 mm, proportion carapace length:abdominal length 1:1. Uniformly orange-brown species (figs. 7. A–C). Carapacebroadly oval, strongly elevated, surface smooth, without spikes, lateral margin straight, with blunt denticles, with second, strongly rebordered, straight margin below (figs. 7. E, G; 8. B). Eyesposterior row straight from above, procurved from front (figs. 7. E; 8. B). Sternumwith radial furrows of small pits between coxae, anterior margin with transverse groove. Mouthparts: Chelicerae promargin with row of flattened hairs (fsh) in combination with feather-like hairs (flh), (see fig. 2. E); labium triangular, not fused to sternum, anterior margin deeply incised (ldi), (figs. 8. C–D); endites slender, distally only slightly branched, with distal patch of fork-like serrated setae (coh), outer part with some broadish, funnel shaped, distally serrated setae (fuh), (fig. 8. E). Abdomen: Broadly-ovoid, dorsal scutum not fused to epigastric scutum, postepigastric scutum short, almost circular, with short, posteriorly directed lateral apodemes, posterior spiracles not connected by groove or dark belt (fig. 8. H), booklung covers roundish. Legs: Ventral apex of tibiae III and IV with one or few specialized hairs with fine, plumose, curved hair tip (see fig. 16. H); metatarsi III, IV and tarsus IV with harpoon-like hairs (see fig. 2. G); tibiae I and II ventral surface with smooth stripes containing pores (figs. 8. F–G), less distinct stripes also observed on femora I–IV and metatarsi III– IV, pores not observed but absence unproved. Femora without spines. Male genitalia: Male palp(figs. 9. A–I) embolus (emb) light, short and straight; retrolateral-dorsally framed by a brush of thickened hairs (bsh) (figs. 9. E–I); conductor-complex about as long as embolus, divided in a prolateral, broadish branch (pbb) and in a ventral branch (vb), both surrounded by numerous setae (figs. 9. E–I). Bulb about twice as long as cymbium, stout, tapering apically (figs. 9. A–C). Femur elongated, slender (figs. 9. A–B). FEMALE: unknown.
Distribution: Known only from the typelocality, the Rimbo Panti Nature Reserve on Sumatra.
3014674309
primary forest
2006-06-13
MHNG
P. Schwendinger
Rimbo Panti Nature Reserve
350
0.34611112
West Sumatra Province: Rimbo Panti Nature Reserve, about 30 km N of Lubuksikaping
21
100.06917
West Sumatra Province
9
10
PBI_OON 00012418
1
3
Sumatra
holotype
3014674350
2006-06-13
MHNG
P. Schwendinger
Rimbo Panti Nature Reserve
350
0.34611112
Sumatra
21
100.06917
West Sumatra Province
9
10
PBI_OON 00031971
1
1
paratype
3014674325
[325,1290,834,859]
2006-06-13
MHNG, NMBE
P. Schwendinger
Rimbo Panti Nature Reserve
350
0.34611112
Sumatra
21
100.06917
West Sumatra Province
9
10
6
3
paratype
3014674332
2006-06-13
NMBE
P. Schwendinger
Rimbo Panti Nature Reserve
350
0.34611112
Sumatra
21
100.06917
West Sumatra Province
9
10
PBI_OON 00031973
1
1
paratype