Eterosonycha ocellata Rix & Harvey, 2010

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: 41-42

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.3789405

persistent identifier

http://treatment.plazi.org/id/46E2827A-B315-4C35-855E-705A20E6B220

taxon LSID

lsid:zoobank.org:act:46E2827A-B315-4C35-855E-705A20E6B220

treatment provided by

Plazi

scientific name

Eterosonycha ocellata Rix & Harvey
status

sp. n.

Eterosonycha ocellata Rix & Harvey   , sp. n.

urn:lsid:zoobank.org:act:46E2827A-B315-4C35-855E-705A20E6B220

Figs 51D, 54–55

Type material. Holotype male: Great Otway National Park , Maits Rest, 10 km W. of Apollo Bay, Victoria, Australia, sifting moss from trunk of Nothofagus cunninghamii   , 38°45'19"S, 143°33'18"E, 23.IV.2006, M. Rix ( NMV K10768 View Materials ). GoogleMaps  

Paratypes: Allotype female, same data as holotype ( NMV K10769 View Materials ); 1 male, same data as holotype ( WAM T94443 View Materials ) GoogleMaps   .

Etymology. The specific epithet is derived from the Latin ‘ocellatus’, meaning ‘having little eyes’ ( Brown 1956), and refers to the small eyes of this species.

Diagnosis. Males of Eterosonycha ocellata   can be distinguished from all other described congeners by the shape of the distal conductor, which has a tubular prolateral process and bifurcate retrolateral process ( Fig. 55 View Figure 55 ). Females can be distinguished from all other described congeners by the distinctive shape of the external epigyne ( Fig. 54D View Figure 54 ). Both sexes can also be recognised by the relatively small eyes ( Fig. 54C View Figure 54 ).

Description. Holotype male: Total length 0.83. Carapace 0.42 long, 0.35 wide. Abdomen 0.57 long, 0.41 wide. Leg I femur 0.33. Body colour pale tan-yellow, carapace slightly darker. Carapace raised anteriorly, not fused to sternum except around petiole; dorsal surface of pars cephalica slightly convex in lateral view. Eight eyes present on anterior margin of pars cephalica; AME 0.5x diameter of ALE; PME separated by slightly more than their own diameter. Chelicerae each with large, bulging anterior projection; promargin with three peg teeth. Legs relatively short (leg I femur-carapace ratio 0.79); distal, prolateral macroseta present on tibia I. Abdomen oval, covered with hair-like setae; dorsal scute large, covering most of dorsal surface of abdomen; lateral sclerotic strips absent. Pedipalpal patella with retrolaterally-directed, hooked lRPA and expanded distal region with ornate, ridged cuticular microstructure; tibia enlarged, with pronounced, curved posterior process; tegulum large, bulging posteriorly, with excavate ETR and large, divergent, fleshy distal conductor bearing tubular prolateral process and bifurcate retrolateral process; embolus short (length <5× width), spur-like, situated adjacent to base of conductor ( Fig. 55 View Figure 55 ).

Allotype female: Total length 1.00. Carapace 0.47 long, 0.33 wide. Abdomen 0.62 long, 0.46 wide. Leg I femur 0.35. Cephalothorax, abdominal sclerites, legs tan-yellow; abdomen dark olive brown dorsally, with chequered dark-olive and tanyellow pattern laterally and ventrally. Carapace raised anteriorly, not fused to sternum except around petiole; dorsal surface of pars cephalica slightly convex in lateral view. Eight eyes present on anterior margin of pars cephalica; AME 0.5x diameter of ALE; PME separated by their own diameter. Chelicerae without bulging anterior projections; promargin without peg teeth. Legs relatively short (leg I femurcarapace ratio 0.74); 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 morphology ( Fig. 54D View Figure 54 ); spermathecae looped and twisted; insemination ducts broad, curved; fertilisation ducts filiform (Fig. 51D).

Distribution. Known only from the Otway Ranges of Victoria.

Remarks. Eterosonycha ocellata   is an unusual species of Eterosonycha   , currently known only from the Otway Ranges of Victoria. The type specimens were found living together in moss on the trunk of a large Southern Beech ( Nothofagus cunninghamii   ) tree, in dark, wet, cool-temperate rainforest at Maits Rest.

NMV

Museum Victoria

WAM

Western Australian Museum