Ablemma singalang
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Ordo: Araneae
Familia: Tetrablemmidae
Genus: Ablemma
Name
Ablemma singalang Lehtinen, 1981 – Wikispecies link – Pensoft Profile
Type material
Holotype ♂ and paratype ♂ from Indonesia, Sumatera Barat, Padangpanjang district, Gunung Singgalang (1750 m), very dark dense jungle with ferns, 25.IX.1978, PTL, in MZT (Turku); not examined.
Additional material examined
Indonesia, Sumatra, Bukit Duabelas 01°59'42.5"S, 102°45'08.1"E, secondary lowland rainforest litter, 1♀, October 2012, M. Jochum, A. Barnes (LIPI); 1♀, October 2013 (LIPI); Harapan, 02°09'09.9"S, 103°21'43.2"E, secondary lowland rainforest litter, 1♂, October 2012, M. Jochum, A. Barnes (ZMH–A0001347); 1♀, October 2012, M. Jochum, A. Barnes (ZMH–A0001353); 1♀, October 2012, M. Jochum, A. Barnes (ZMH–A0001357); 1♂, October 2012, M. Jochum, A. Barnes (ZMH–A0001358); 1♀, October 2012, M. Jochum, A. Barnes (ZMH–A0002639); 1♂, October 2013 (LIPI); 1♂, October 2013, B. Klarner (ZMH–A0002636); 1♀, October 2013, B. Klarner (ZMH–A0002641); 1♂1♀, 08 March 2017, B. Klarner (ZMH–A0001211); 1♂, 10 June 2017, B. Klarner (ZMH–A0001210); 1♂, 10 June 2017, B. Klarner (ZMH–A0001213); 1♂1♀, 08 March 2017, B. Klarner (ZMH–A0001207); 2♂, 08 August 2017, B. Klarner (ZMH–A0001208); 1♂2♀, October 2017, B. Klarner (ZMH–A0001214); 1♀, October 2017, B. Klarner (ZMH–A0001217); 1♂2♀, 26 November 2017, B. Klarner (ZMH–A0001209); 01°54'39.5"S, 103°16'00.1"E, rubber plantation, 1 ♂, October 2012, M. Jochum, A. Barnes (ZMH-A0001356); 1♀, October 2013, B. Klarner (ZMH–A0002637); 1♂, October 2013, B. Klarner (ZMH–A0002643); 1♂, 26 November 2017, B. Klarner (LIPI); 01°55'40.0"S, 103°15'33.8"E, 1♂, rainforest with rubber trees, 1♂2♀, October 2012, M. Jochum, A. Barnes (ZMH–A0001359); 3♂, October 2012, M. Jochum, A. Barnes (ZMH–A0001360); 1♀, October 2012, M. Jochum, A. Barnes (ZMH–A0002635); 1♂, October 2013, B. Klarner (ZMH–A0001216); 3♂, October 2013, B. Klarner (ZMH–A0002638); 3♂, October 2013, B. Klarner (ZMH–A0002640); 1♀, October 2013, B. Klarner (ZMH–A0002642).
Diagnosis
Females of Ablemmasingalang can be distinguished from most congeners by the small rounded basal boss on the chelicerae (Fig. 30, arrow), and the elongated narrow inner plate of the internal genitalia (Fig. 33); short and triangular in other species. Furthermore, females are distinguished from A.malacca with similar internal genitalia, by the larger carapace tubercles (Fig. 31), smaller in the latter species (see Lin et al. 2017[1], fig. 7H).
Description
Male. See Lethinen 1981: 48.
Female. Measurements: Total length: 1.14; carapace length: 0.48; carapace width: 0.41; abdomen length: 0.66; abdomen width: 0.60; clypeus height: 0.11. Length of legs: I 0.90 (0.29, 0.12, 0.23, 0.13, 0.13); II 0.78 (0.28, 0.13, 0.22, 0.15, 0.15); III 0.89 (0.26, 0.11, 0.20, 0.16, 0.16); IV 1.18 (0.36, 0.13, 0.30, 0.20, 0.19).
Carapace: Brownish orange; pars cephalica smooth dorsally, flat behind the ocular area than sloping upward with a fringe of 5 pits of which each bear a seta, and 3 small tubercles at apical end, reticulated laterally; pars thoracica finely reticulated, sloping straight down and then at an angle (Figs 28, 31); clypeus brownish yellow; sloping forward; short and smooth (Figs 30, 31). Sternum: Brownish orange; slightly wider than long, reticulated except medially (Fig. 29). Chelicerae: Yellowish orange; basal boss as a small rounded projection (Fig. 30, arrow); lamina well developed, translucent. Eyes: 6 eyes in compact group (Fig. 28). Abdomen: Dorsal scutum smooth, yellowish brown (Fig. 28). Laterally with 4 yellowish brown stripe-like plate, separated (Fig. 31). Ventrally covered by 4 smooth scuta; plumonary scutum brownish orange, with oval book-lung covers; postgenital scutum thin and straight, shorter than preanal scutum; preanal scutum large, rectangular, with dark and rounded posteromedial corner and 2 small posterolateral corners; anal scutum conical, short and curved (Fig. 32). Legs: Brownish orange, femora I–IV rugose ventrally. Genitalia: Inner plate long, distal end slightly bent; ducts narrow, transculent, connected to seminal receptacle; sac-like seminal receptacle with distinctly folded cuticle (Fig. 33).
Natural history
Male and females specimens were collected together in secondary lowland rainforest, rainforest with rubber trees, and rubber plantation.
Distribution
Indonesia, Sumatra Barat, Jambi provinces.
Taxon Treatment
- Fardiansah, R; Dupérré, N; Widyastuti, R; Potapov, A; Stefan Scheu, ; Harms, D; 2019: Description of four new species of armoured spiders (Araneae, Tetrablemmidae) from Sumatra, Indonesia ZooKeys, (820): 95-118. doi
Images
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Other References
- ↑ Lin Y, Koh J, Koponen S, Li S (2017) Taxonomic notes on the armored spiders of the families Pacullidae and Tetrablemmidae (Arachnida, Araneae) from Singapore.ZooKeys661: 15–60. https://doi.org/10.3897/zookeys.661.10677
