Trilacuna loebli Grismado and Piacentini, 2014

Grismado, Cristian J., Deeleman, Christa, Piacentini, Luis N., Izquierdo, Matías A. & Ramírez, Martín J., 2014, Taxonomic Review Of The Goblin Spiders Of The Genus Dysderoides Fage And Their Himalayan Relatives Of The Genera Trilacuna Tong And Li And Himalayana, New Genus (Araneae: Oonopidae), Bulletin of the American Museum of Natural History 2014 (387), pp. 1-108 : 44-47

Trilacuna loebli Grismado and Piacentini , new species

Figure 35

TYPES: Female holotype and female paratype from India: Assam: Manas, Manas Wildlife Sanctuary , 200 m, N 26.72500 °, E 91.03600 °, Oct. 21–22, 1978, C. Besuchet, I. Löbl ( MHNG PBI_OON 12818 ).

ETYMOLOGY: The specific name is a noun in apposition in honor to Ivan Löbl, one of the collectors of this and other oonopids from the Himalayas.

DIAGNOSIS: Females of this species are recognizable by the worm-shaped posterior receptacle, describing a strong posterior curve before connecting to the uterus externus (fig. 35H–I).

DESCRIPTION: Female (paratype, PBI_ OON 12818). Total length 1.70. Cephalothorax: Carapace sides granulate; nonmarginal pars cephalica setae light, scattered; marginal setae absent. Clypeus setae light, needlelike. Eyes all subequal, all eyes oval; ALE–PLE separated by less than ALE radius, PME touching throughout most of their length. Sternum orange, without radial furrows between coxae I–II, II–III, III–IV, microsculpture covering entire surface, lateral margins unmodified. Mouthparts: chelicerae, endites, and labium orange. Chelicerae orange; setae light; paturon distal region unmodified. Labium orange; with one or two setae on anterior margin. Endites distally not excavated, orange. Palp without spines. Abdomen: Book lung covers round. Dorsal scutum covering full length of abdomen, orange. Postepigastric scutum covering about 2/3 of abdominal length, orange. Dorsum setae dark. Epigastric area dark. Postepigastric area setae dark. Legs: Patella plus tibia I nearly as long as carapace. Leg spination (all spines longer than segment width): leg I: femora pv0-0-1-0, tibiae v2-2-2-2-0, metatarsi v2-2-0; leg II: tibiae v2-2-2-2-0, metatarsi v2- 2-0. Trichobothria not examined. Genitalia: Ventral view: postepigastric scutum with indented anterior margin; posterior receptacle visible through scutum, dark. Internal female genitalia: anterior sclerite T-shaped, connected by muscles presumably to the lateral ends of the transverse bar; posterior receptacle worm shaped, running posteriorly at first, and then describing a wide anterior-directed curve (fig. 35I), becoming gradually thinner and sinuous, and ending at the epigastric furrow.

Male: Unknown.

OTHER MATERIAL EXAMINED: Same data as the types, 2♀ ( MHNG PBI _OON 15303) ; same locality and collectors, Oct. 22, 1978, 1♀ ( MHNG PBI_OON 12791 ) .

DISTRIBUTION: Known only from the type locality.

Figures

Fig. 35. Trilacuna loebli, new species, female (PBI_OON 12818). A. Habitus, dorsal view. B. Same, ventral view. C. Same, lateral view. D. Carapace, dorsal view. E. Same, ventral view. F. Same, lateral view. G. Same, anterior view. H. Epigastric area, ventral view. I. Internal genitalia, dorsal view. AP = apodeme; AS = anterior sclerite; PR = posterior receptacle; arrow = gland field.