Dysderoides muang Grismado and Deeleman 2014, new species
Creators: name: Grismado, Cristian J.
name: Deeleman, Christa
name: Piacentini, Luis N.
name: Izquierdo, Matías A.
name: Ramírez, Martín J.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Oonopidae
Dysderoides
Dysderoides muang

description: Dysderoides muang Grismado and Deeleman, new species
Figures 2–8, 14A
TYPES: Male holotype and two female paratypes from Thailand: Chiang Mai Province, San Kamphaeng: Tham (= cave) Muang On near the village of Ban On Lhuoy, humus, July 20, 1985, P. Leclerc (RMNH PBI_OON 12917); one additional female paratype with same data (RMNH PBI _OON 12916).
ETYMOLOGY: The specific name is a noun in apposition taken from the type locality.
DIAGNOSIS: Males of this species are very similar to those of D. kanoi, new species, but the bulb is less bulging dorsally, and the basal-ventral area is more angular. The embolus is gently sinuous (fig. 14A), not as curved ventrally as in D. kanoi. Females resemble the other Thai species by having only one transverse plate in the genitalia, but the posterior receptacle is smaller (fig. 7H). This species is the only known species that has the serrulalike denticle series in the inner margin of the chelicerae, very conspicuous in the SEM images of the female (fig. 3E, F), but probably also present in males (see the suggestive darkened area in the fig. 8E).
DESCRIPTION: Male (holotype, PBI_OON 12917). Total length 1.64. Cephalothorax: Sternum without radial furrows between coxae I–II, II–III, III–IV. Mouthparts: chelicerae, endites, and labium yellowish white. Paturon inner margin with medial series of denticles (‘‘serrulalike’’). Abdomen: Pedicel tube short, unmodified. Dorsal scutum covering more than 3/4 of abdomen, more than 1/2 to most of abdomen width, not fused to epigastric scutum, yellowish white, slightly sclerotized, hard to discern. Postepigastric scutum fused to epigastric scutum, yellowish white. Interscutal membrane with setae. Legs: Leg spination (all spines longer than segment width): leg I: tibiae v2-2-2-2-0, metatarsi v2-2-0; leg II: tibiae v2-2-2-2-0, metatarsi v2-2-0; leg III: tibiae p1, v1ap, dp2- 0, metatarsi r1; leg IV: tibiae p1-1-1, v0-0-1, r1-1-1, metatarsi p1-1-0, r0-1-1. Genitalia: Epigastric furrow without setae. Copulatory bulb yellowish white, embolus slightly curved ventrally at its end (fig. 14A).
Female (paratype, PBI_OON 12917). Total length 1.78. As in male except as noted. Cephalothorax: Carapace yellow-brown; nonmarginal pars cephalica setae absent; nonmarginal pars thoracica setae absent. Sternum yellowish white, posterior margin not extending posteriorly of coxae IV; setae dark, evenly scattered. Abdomen: Dorsal scutum absent, dorsum soft portions white. Book lung covers elliptical. Epigastric scutum slightly sclerotized, hard to discern. Postepigastric scutum yellowish white, slightly sclerotized, hard to discern. Spinneret scutum absent. Dorsum setae light. Epigastric and postepigastric setae light. Legs: White. Leg spination (all spines longer than segment width): leg I: tibiae v2-2-2-2-0, metatarsi v2- 2-0; leg II: tibiae v2-2-2-2-0, metatarsi v2-2-0; leg III: tibiae v1ap, dp2-0, metatarsi r1, dp2- 0; leg IV: tibiae p1, dp2-2, metatarsi r1, dp2-2. Trichobothria base shape rounded (fig. 6A– G). Genitalia: Anterior sclerite elongated, posterior receptacle small, rounded; posterior transverse plate present, narrow, slightly procurved, with an anterior thickened border (fig. 7H).
OTHER MATERIAL EXAMINED: None.
DISTRIBUTION: Known only from a single cave in the type locality.
description: Published as part of 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), pp. 1-108 in Bulletin of the American Museum of Natural History 2014 (387) on pages 12-20, DOI: 10.1206/843.1, http://zenodo.org/record/5379126