Hexamatia seekhaow Rivera-Quiroz & Petcharad & Miller 2020, gen. et sp. nov.
Creators: name: Rivera-Quiroz, Francisco Andrés
name: Petcharad, Booppa
name: Miller, Jeremy A.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Hahniidae
Hexamatia
Hexamatia seekhaow

description: Hexamatia seekhaow gen. et sp. nov.
urn:lsid:zoobank.org:act: 1D1D0DE7-8A2A-4469-8867-666F9AD6EAEB
Figs 2–3
Diagnosis
Hexamatia seekhaow gen. et sp. nov. greatly resembles H. senaria gen. nov. but can be distinguished by the bifurcated PA and having a slightly shorter RTA with a blunter tip (Figs 2f, 3 d–e; Zhang et al. 2011: figs 21a–d, 22). Another putative difference is the presence of denticles in the distal portion of the RTA; these are not mentioned nor illustrated for H. senaria gen. nov.
Etymology
The species epithet is a derivation of the Thai seekhaow (white); refers to the lack of color on the body of the holotype of this species.
Type material
Holotype
THAILAND • ♂; Chiang Mai Province, Doi Suthep National Park; 18º48.502′ N, 98º53.528′ E; 1409 m a.s.l.; 24–28 Jul. 2018; Booppa Petcharad, Jeremy Miller and F. Andrés Rivera-Quiroz leg.; montane evergreen forest with pine; hand coll. among leaf litter; RMNH.ARA.18411 (four legs used for DNA extraction).
Description
Male holotype
Carapace yellowish-white, pale brown in cephalic region (Fig. 2 b–c). Legs same color as carapace. Abdomen white without chevron pattern, oval, longer than wide (Fig. 2 a–c). Six eyes in two triads,
AME absent ALE 0.04 mm, PME 0.02 mm, PLE 0.02 mm, ALE–ALE 0.02 mm, PME–PME 0.03 mm, PME–PLE contiguous (Fig. 2d). Chelicerae with three promarginal and two retromarginal teeth (Fig. 3g).Tracheal spiracle near middle of abdomen (Fig. 2a).
PALP. Pale brown, same color as cephalic region (Fig. 2c). CF darker, almost as long as RTA (Figs 2 e–f, 3b), oval-shaped from ventral view (Figs 2f, 3a). Median apophysis narrow, elongate and transparent (Fig. 3 a–b). Embolus filiform, black and long, originating retrollaterally and coiling clockwise around bulb (Figs 2f, 3 a–b). RTA spur-like with dark rings. Patellar apophysis short and bifid, with the longer prong hook-shaped (Fig. 3c).
MEASUREMENTS (in mm). Total length 1.1, carapace 0.46 long, 0.33 wide; clypeus 0.01; chelicera 0.2 long, 0.1 wide; pedipalp 0.4 long; palp bulb 0.11 wide; leg I: femur 0.32, patella 0.13, tibia 0.26, metatarsus 0.22, tarsus 0.15; leg II: femur 0.31, patella 0.12, tibia 0.19, metatarsus 0.19, tarsus 0.15; leg III: femur 0.27, patella 0.08, tibia 0.16, metatarsus 0.17, tarsus 0.15; leg IV: femur 0.34, patella 0.11, tibia 0.22, metatarsus 0.21, tarsus 0.16; leg formula IV-I-II-III; abdomen 0.45 long, 0.34 wide.
Distribution
Known from the type locality, Doi Suthep National Park, Chiang Mai, Thailand (Fig. 8).
Notes
See the Discussion for remarks on six-eyed species.
description: Published as part of Rivera-Quiroz, Francisco Andrés, Petcharad, Booppa & Miller, Jeremy A., 2020, First records and a new genus of comb-tailed spiders (Araneae: Hahniidae) from Thailand with comments on the six-eyed species of this family, pp. 51-69 in European Journal of Taxonomy 724 on pages 56-59, DOI: 10.5852/ejt.2020.724.1157, http://zenodo.org/record/4298074