Epigastrina typhlops Rix & Harvey

Rix, Michael & Harvey, Mark, 2010, The spider family Micropholcommatidae (Arachnida: Araneae: Araneoidea): a relimitation and revision at the generic level, ZooKeys 36 (36), pp. 1-321: 45-46

publication ID

http://doi.org/ 10.3897/zookeys.36.306

publication LSID

lsid:zoobank.org:pub:ADCACC88-6C78-4386-8E33-3F98234ECE92

DOI

http://doi.org/10.5281/zenodo.3789397

persistent identifier

http://treatment.plazi.org/id/7E13878E-FF9A-1B56-FF32-1E64FD1F8DE1

treatment provided by

Plazi

scientific name

Epigastrina typhlops Rix & Harvey
status

sp. n.

Epigastrina typhlops Rix & Harvey   , sp. n.

urn:lsid:zoobank.org:act:39623469-D1A5-4EDD-974A-1F3AD909EBC8

Figs 63E View Figure 63 , 65–66 View Figure 65 View Figure 66 , 213

Type material. Holotype male: Kubla Khan (MC-1), Mole Creek karst, Tasmania, Australia, from sheet web with vertical stay lines in cracks of wall above pool, near lower entrance (dark zone), 41°33'12"S, 146°16'52"E, 24.X.1990, S. Eberhard ( AMS KS29793). GoogleMaps  

Paratypes: Allotype female, same data as holotype ( QVM 13 View Materials : 12765) GoogleMaps   .

Etymology. The specific epithet is derived from the Greek ‘typhlos’, meaning ‘blind’ ( Brown 1956), and refers to the absence of eyes in this species.

Diagnosis. Males and females of Epigastrina typhlops   can be distinguished from all other described congeners by the complete absence of eyes ( Fig. 65C View Figure 65 ).

Description. Holotype male: Total length 1.18. Carapace 0.53 long, 0.39 wide. Abdomen 0.70 long, 0.47 wide. Leg I femur 0.48. Cephalothorax, legs very pale tan-yellow; abdomen pale cream. Carapace raised anteriorly, not fused to sternum except around petiole; dorsal surface of pars cephalica slightly convex in lateral view. Eyes absent. Chelicerae each with large, bulging anterior projection; promargin with three peg teeth. Legs relatively short (leg I femur-carapace ratio 0.91); distal, prolateral macroseta present on tibia I. Abdomen oval, covered with hair-like setae; dorsal scute large, indistinct, covering most of dorsal surface of abdomen; lateral sclerotic strips absent. Pedipalpal patella with retrolaterally-directed, hooked lRPA and ornate, ridged cuticular microstructure; tegulum large, bulging posteriorly, with excavate ETR and very large, divergent, fleshy medial conductor bearing rod-like prolateral process and massive, fleshy retrolateral process; embolus short (length <5× width), spur-like, distally hooked, situated between divergent processes of conductor ( Fig. 66 View Figure 66 ).

Allotype female: Total length 1.12. Carapace 0.49 long, 0.40 wide. Abdomen 0.76 long, 0.55 wide. Leg I femur 0.43. Cephalothorax, legs very pale tan-yellow; abdomen pale cream, with darker tan-yellow epigyne. Carapace raised anteriorly, not fused to sternum except around petiole; dorsal surface of pars cephalica slightly convex in lateral view. Eyes absent. Chelicerae without bulging anterior projections; promargin without peg teeth. Legs relatively short (leg I femur-carapace ratio 0.88); macrosetae absent. Abdomen oval, covered with hair-like setae; dorsal scute and lateral sclerotic strips absent. Pedipalp entire, five-segmented. Epigyne heavily sclerotised externally, with distinctive, wedge-shaped epigastric plate ( Fig. 65D View Figure 65 ); spermathecae globular, connecting to parallel, filiform insemination and fertilisation ducts ( Fig. 63E View Figure 63 ).

Distribution. Known only from the cave Kubla Khan in the Mole Creek karst of north-central Tasmania (Fig. 213).

Remarks. Epigastrina typhlops   is a highly troglomorphic and completely blind species, otherwise very similar to E. fulva   and E. loongana   .