Stephanopis squalida Machado

Machado, Miguel, Teixeira, Renato Augusto & Milledge, Graham A., 2019, On the Australian Bark Crab Spider Genus Stephanopis: Taxonomic Review and Description of Seven New Species (Araneae: Thomisidae: Stephanopinae), Records of the Australian Museum 71 (6), pp. 217-276: 272-274

publication ID

http://doi.org/ 10.3853/j.2201-4349.71.2019.1698

publication LSID

lsid:zoobank.org:pub:7EDBAB7F-0E3B-47D7-AA29-0906728ADA05

persistent identifier

http://treatment.plazi.org/id/26714D71-FF86-FFCF-07FC-FA10FDC0F9A1

treatment provided by

Felipe

scientific name

Stephanopis squalida Machado
status

sp. nov.

Stephanopis squalida Machado   sp. nov.

http://zoobank.org/NomenclaturalActs/ 3ABBAF3D-1669-4972-90AE-06BCEBD85B96

Figs 47–48 View Figure 47 View Figure 48

Holotype ♀, QM S27834 View Materials , Bellenden Ker Range , Queensland, Australia, 17°15'59"S 145°53'56.97"E, Queensland Museum & Earthwatch Expedition, 17–24 October 1981 GoogleMaps   . Paratypes: QM S109932, 3♂♂, same data as holotype GoogleMaps   .

Other material examined. Queensland: QM S110120, 1♀, Mount Finnigan (37 Km south of Cooktown ), 15°48'13.25"S 145°18'22.07"E GoogleMaps   , G. Monteith, D. Yeates & D. Cook, 19–22 April 1982; QM S110113, 1♀, 2.5 km southwest of Mt Hartley near Cairns, G. Monteith, D. Yeates & D. Cook   , 23–24 April 1982; QM S110092, 1♂   , Cape Tribulation , 16°5'16.04"S 145°27'17.20"E GoogleMaps   , G. Monteith, D. Yeates & G. Thompson, 27 September–7 October 1982; QM S110088, 1♀, Thornton Peak (via Daintree ), 16°13'55.07"S 145°20'26.62"E GoogleMaps   , G.B. Monteith, 24–27 September 1984; QM S110121, 1♀, G. Monteith & D. Cook   , 20–22 September 1981; QM S27620 View Materials , 1♂, Bellenden Ker Range , 17°15'13.12"S 145°54'8.48"E GoogleMaps   , Queensland Museum & Earthwatch expedition   , 25–31 October 1981; QM S27622 View Materials , 1♂   , 1–7 November 1981; QM S27836 View Materials , 1♂, Bellenden Ker Range ( Cableway Base ), 17°15'59.00"S 145°53'56.97"E GoogleMaps   , Queensland Museum & Earthwatch expedition, 17–24 October 1981; QM S110089, 2♂♂, Cardwell Range , 18°14'60"S 145°49'60"E GoogleMaps   , Monteith, Yeates & Thompson, 17–21 December 1986

Diagnosis. Females of S. squalida   sp. nov. resemble those of S. fissifrons   by the trapezoid opisthosoma ( Fig. 47A View Figure 47 ) and flattened prosoma ( Fig. 47B View Figure 47 ), however they can be recognized by their CO arranged horizontally and the reduced atrium on the epigynal plate ( Fig. 47C View Figure 47 ). Moreover, the setiferous tubercles and projections on the anterior legs of S. squalida   sp. nov are well-developed when compared to S. fissirons   . Males are also similar to those of S. fissifrons   , but can be distinguished by the embolus being shorter, the cymbium being oval, by the wider RTA ( Fig. 48D View Figure 48 ) and hyaline Pcym ( Fig. 48C View Figure 48 ).

Description. Female (QM S 110113): Anterior eye row recurved and posterior row straight. Prosoma and legs entirely reddish-brown except for the femora III and IV, which are yellow; opisthosoma dark-yellow, slightly concave on the anterior border and square-ended, trapezoid ( Fig. 47A View Figure 47 ). Spermathecae reduced, with glandular-heads directed dorsally and anterior chambers wide, membranous and ovalshaped ( Fig. 47D View Figure 47 ).

Measurements: eye diameters and interdistances: AME 0.07, ALE 0.17, PME 0.15, PLE 0.12, AME–AME 0.09, AME–ALE 0.12, PME–PME 0.23, PME–PLE 0.17, MOQ length 0.42, width 0.39; leg formula: 1-2-3-4: leg I—femur 3.25/ patella 1.67/ tibia 2.33/ metatarsus 1.47/ tarsus 0.75/ total 9.47; II—2.94/ 1.44/ 2.07/ 1.33/ 0.76/ 8.54; III—2.07/ 1.00/ 1.71/ 1.07/ 0.72/ 6.57; IV—2.20/ 0.90/ 1.48/ 1.01/ 0.64/ 6.23. Total body length 7.12; prosoma length 3.24, width 2.87; opisthosoma length 3.88; clypeus height 0.14; sternum length 1.45, width 1.23; gnathocoxae length 0.82, width 0.38; labium length 0.47, width 0.58.

Male (QM S27834 View Materials ): Opisthosoma covered by hyaline setae, with tufts gathered on the sides of the cephalic area ( Fig. 48B View Figure 48 ). As in female, both prosoma and legs possess brownish pigmentation but in males femora II are also yellow; opisthosoma dark-yellow with white guanine stains on the dorsum forming a X-shape ( Fig. 48A View Figure 48 ). Other somatic characteristics as in female.

Measurements: eye diameters and interdistances: AME 0.05, ALE 0.14, PME 0.11, PLE 0.12, AME–AME 0.07, AME–ALE 0.06, PME–PME 0.11, PME–PLE 0.09, MOQ

274 Records of the Australian Museum (2019) Vol. 71 length 0.31, width 0.26; leg formula: 1-2-3-4: leg I—femur 2.21/ patella 0.98/ tibia 1.62/ metatarsus 1.13/ tarsus 0.58/ total 6.52; II—2.03/ 0.91/ 1.52/ 1.02/ 0.55/ 6.03; III—1.35/ 0.55/ 1.16/ 0.75/ 0.55/ 4.36; IV—1.39/ 0.55/ 0.96/ 0.75/ 0.45/ 4.10. Total body length 3.95; prosoma length 2.03, width 1.83; opisthosoma length 1.92; clypeus height 0.09; sternum length 0.82, width 0.84; gnathocoxae length 0.50, width 0.25; labium length 0.24, width 0.30.

Etymology. The specific name is a Latin feminine adjective that means “miserable”, in reference to the smaller size of the spider and its less pronounced somatic characters when compared to other similar species of the genus.

Distribution. Queensland, Australia ( Fig. 49 View Figure 49 ).

QM

Queensland Museum