Stephanopis spiralis 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: 270-271

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-FF84-FFC0-07E5-FA24FBBCF84C

treatment provided by

Felipe

scientific name

Stephanopis spiralis Machado
status

sp. nov.

Stephanopis spiralis Machado   sp. nov.

http://zoobank.org/NomenclaturalActs/ F0DDFB73-40AF-43F0-9E48-EAAE984B66D4

Figs 45–46 View Figure 45 View Figure 46

Holotype ♀, AMS KS.114827, Koorawatha National Reserve , 34°01'55"S 148°35'59"E, New South Wales, Australia, B. Baehr, 15 November 2010 GoogleMaps   . Paratype: AMS KS.91528, 1♂, Lower Murray-Darling Region (Wampoo Station), 34°04'16"S 143°13'49"E, New South Wales, Australia, M. Lebreton, 6–10 March 2000 GoogleMaps   .

Other material examined. New South Wales: AMS KS.75074, 1♀, Coolah Tops NP ( Cox’s Creek campground), 31°44'00"S 150°00'30"E, M. Gray, G. Milledge & H. Smith, 7 November 2001 GoogleMaps   ; AMS KS.78947, 1♂, Yathong Nature Reserve , 32°50'56"S 146°10'58"E, D. Eldridge, March 2001 GoogleMaps   . South Australia: SAM NN22647 View Materials , 1♂, Tarcowie, 33°0'36"S 138°35'49"E, 17–22 March 2004 GoogleMaps   .

Diagnosis. Both males and females are similar to S. cambridgei   in their body size and proportion, shape of the atrium and folds of epigynal plate and by the single long and pointed RTA on male palp. S. spiralis   can be distinguished by its darker body colour, which is dark-brown rather than orange; by females having a wider atrium ( Fig. 46C View Figure 46 ) and spiral copulatory ducts vertically positioned ( Fig. 45D View Figure 45 ); and by the male palp bearing an embolus coiled at its basis and a cymbium longer than wide directed retro laterally ( Fig. 46C View Figure 46 ).

Description. Female (AMS KS.114827): Cephalic area prominent (not as much as in S. altifrons   but higher than in S. cambridgei   ), eyes arranged in a strongly recurved anterior row and in a straight posterior one; prosoma, opisthosoma and legs uniformly dark-brown (almost black), covered by many hyaline or whitish setae ( Fig. 45A View Figure 45 ). Spermathecae long, sclerotized, coiled (2 coils) and bearing a pair of glandular-heads pointing sideways ( Fig. 45D View Figure 45 ).

Measurements: eye diameters and interdistances: AME 0.07, ALE 0.15, PME 0.11, PLE 0.11, AME–AME 0.11, AME–ALE 0.06, PME–PME 0.15, PME–PLE 0.14, MOQ length 0.38, width 0.25; leg formula: 1-2-4-3: leg I—femur 3.19/ patella 1.68/ tibia 3.07/ metatarsus 2.18/ tarsus 0.88/ total 11.00; II—2.66/ 1.30/ 2.38/ 1.89/ 0.87 9.10; III—1.88/ 0.92/ 1.44/ 1.23/ 0.73/ 6.20; IV—2.38/ 0.97/ 1.90/ 1.80/ 0.84/ 7.89. Total body length 7.52; prosoma length 3.26, width 3.10; opisthosoma length 4.26; clypeus height 0.55; sternum length 1.60, width 1.50; gnathocoxae length 0.87, width 0.45; labium length 0.47, width 0.59.

Male (AMS KS.91528): Prosoma and legs predominantly dark-brown with dark-yellow areas (thoracic portion of prosoma) and anulli (legs) ( Fig. 46A View Figure 46 ); opisthosoma obovate, covered by short hyaline setae and presenting large symmetrical yellowish spots near the dorsal sigillae which are reduced to small punctuations on the sides ( Fig. 46A View Figure 46 ); RTA thin, long, pointed and slightly sinuous ( Figs 46C and D View Figure 46 ).

Measurements: eye diameters and interdistances: AME 0.07, ALE 0.20, PME 0.13, PLE 0.20, AME–AME 0.10, AME–ALE 0.03, PME–PME 0.10, PME–PLE 0.12, MOQ length 0.34, width 0.26; leg formula: 1-2-4-3: leg I—femur 2.80/ patella 1.35/ tibia 2.31/ metatarsus 1.88/ tarsus 0.81/ total 9.15; II—2.24/ 1.04/ 1.77/ 1.48/ 0.74/ 7.27; III—1.46/ 0.70/ 1.04/ 0.93/ 0.56/ 4.53; IV—1.98/ 0.77/ 1.41/ 1.43/ 0.68/ 6.27. Total body length 5.43; prosoma length 2.66, width 2.52; opisthosoma length 2.77; clypeus height 0.36; sternum length 1.24, width 1.19; gnathocoxae length 0.48, width 0.25; labium length 0.35, width 0.44.

Etymology. The specific name is a Latin masculine adjective that means “spiral” and refers to the shape and disposition of the diagnostic copulatory ducts of the females.

Distribution. New South Wales and South Australia, Australia ( Fig. 49 View Figure 49 ).

SAM

South African Museum