Stephanopis carcinoides 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: 243-245

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-FFAB-FFEA-0435-FF6DFEE1F8E4

treatment provided by

Felipe

scientific name

Stephanopis carcinoides Machado
status

sp. nov.

Stephanopis carcinoides Machado   sp. nov.

http://zoobank.org/NomenclaturalActs/ 8F14CAF8-F536-4ADA-840F-C0A331D7EF8E

Figs 19–21 View Figure 19 View Figure 20 View Figure 21

Holotype ♀ AMS KS.108724, from Minnamurra Rainforest Centre (Jamberoo), New South Wales, Australia, 34°38'S 150°44'E, R. Mascord, 1 February 1965 GoogleMaps   . Paratypes: AMS KS.81287, 1♀, Mulgrave River , New South Wales, Australia, 17°07'S 145°47'E GoogleMaps   , R. Mascord, 13 July 1978   ; AMS KS.81293, 1♂, 1 female from Minnamurra Rainforest Centre (Jamberoo), New South Wales, Australia, 34°38'S 150°44'E GoogleMaps   , R. Mascord, 01 November 1966   ; QM S104677, 2♂♂, 1♀, Bunya Mountains (Dandabah Camping Area), Queensland, Australia, 26°52'50.31"S 151°35'50.58"E, Queensland Museum staff, 17 March 1976 GoogleMaps   .

Other material examined. Papua New Guinea, Morobe: MCZ 134023 View Materials , 1♂, Wau , 6°48'4.94"S 146°33'41.93"E, H. Levi, 25 March 1979 GoogleMaps   ; MCZ 134021 View Materials , 1♀, 7°20'13.69"S 146°42'57.37"E, M. Robinson, 20 November 1979 GoogleMaps   ; MCZ 134022 View Materials , 1♂, M. Robinson & H. Levi   . Australia, Queensland: QM S104673, 1♀, Shiptons Flat , 15°44'20.14"S 145°13'32.81"E, Queensland Museum party, 17–21 November 1975 GoogleMaps   ; AMS KS.106795, 1♀, Kuranda , 16°48'35.6"S 145°39'14.29"E, G. Milledge & H. Smith, 8 December 2008 GoogleMaps   ; AMS KS.103078, 1♀, 16°49'50"S 145°38'36"E, G. Milledge & H. Smith, 27 February–7 March 2008 GoogleMaps   ; AMS KS.108713, 1♀, Lake Euramoo , 17°10'S 145°38'E GoogleMaps   , R. E. Mascord , 23 July 1978   ; QM S9925, 1♂, Nerimberah , 23°23'58.74"S 150°35'12.17"E GoogleMaps   , R. Raven & J. Gallon, 17 February 1986   ; QM S14675 View Materials , 1♂, Kroombit Tops NP, 24°22'40.14"S 150°55'42.55"E, Davies & Gallon, 9–19 December 1983 GoogleMaps   ; AMS KS.69488, 1♀, Brisbane Forest Park, 27°25'04"S 152°49'48"E, N. Power, 1–6 March 1998 GoogleMaps   ; AMS KS.69547, 1♀, 12–17 April 1998   ; QM S104653, 1♂, Cooloola , 27°28'11.18"S 153°1'30.45"E GoogleMaps   , R. Raven   & V. E. Davies , 3–8 February 1976   ; QM S14590 View Materials , 1♂, Girraween NP, 28°46' 27.12"S 151°54'42.84"E GoogleMaps   , R. Raven , 22 February 1973   . New South Wales: AMS KS.2830, 1♂, Mount Wilson , 33°30'S 150°23'E, C. Horseman, 28 March 1979 GoogleMaps   .

Diagnosis. Males and females of S. carcinoides   sp. nov. are similar to those S. nigra   and S. altifrons   in having a high cephalic prominence, high clypeus ( Figs 19B View Figure 19 and 20B View Figure 20 ) and cryptic habitus ( Fig. 21 View Figure 21 A–D), however, it is distinguished from these species by its prosoma slightly wider than long, opisthosoma pentagonal and femur I with a pair of prolateral setiferous tubercles instead of just one ( Figs 19A View Figure 19 and 20A View Figure 20 ). The epigynal plate of females resemble those of S. nigra   but the atrium is wider and shorter, and the CO are smaller ( Fig. 19C, D View Figure 19 ). As in S. altifrons   , the male palpi present equal-sized and pointed RTA and RTAvbr, however, in S. carcinoides   sp. nov. the RTA is curved, points ventrally, parallel to the tegulum ( Fig. 20D View Figure 20 ), and both RTA and RTAvbr are shorter and flattened (compressed laterally) ( Fig. 20C View Figure 20 ).

Description. Female (AMS KS.108724): Anterior eye row strongly recurved and posterior procurved, prosoma darkyellow with brown stains on the thoracic portion and sides of the cephalic prominence ( Fig. 19A and B View Figure 19 ). Legs darkyellow with brown patches on the median portion of anterior femora (I and II); patellae, tibiae and metatarsi with brown patches sparsely distributed; anterior tibiae ventrally armed with four pairs of macrosetae ( Fig. 19A View Figure 19 ). Opisthosoma with concave anterior border, whitish-yellow with a brown spot on the heart-sigilla and a pair of darker transverse patches on the posterior region.

Measurements: eye diameters and interdistances: AME 0.07, ALE 0.17, PME 0.15, PLE 0.11, AME–AME 0.10, AME–ALE 0.07, PME–PME 0.18, PME–PLE 0.11, MOQ length 0.44, width 0.35; leg formula: 1-2-4-3: leg I—femur 2.74/ patella 1.54/ tibia 2.19/ metatarsus 1.57/ tarsus 0.97/ total 9.01; II—2.85/ 1.49/ 2.08/ 1.65/ 0.94 9.01; III—2.45/ 1.13/ 2.06/ 1.88/ 0.95/ 8.47; IV—2.64/ 0.91/ 1.97/ 1.95/ 1.06/ 8.53. Total body length 9.31; prosoma length 3.69, width 3.80; opisthosoma length 5.62; clypeus height 0.71; sternum length 1.71, width 1.53; gnathocoxae length 0.95, width 0.47; labium length 0.61, width 0.66.

Male (QM S104677). Eye arrangement and colour pattern as in female, predominantly whitish-yellow with brown patches ( Fig. 20A and B View Figure 20 ). Embolus sclerotized at is basis, flexible at is terminal portion and resting on the apical tegular ridge ( Fig. 20C View Figure 20 ). Other somatic characters as in female.

Measurements: eye diameters and interdistances: AME 0.06, ALE 0.15, PME 0.10, PLE 0.10, AME–AME 0.10, AME–ALE 0.06, PME–PME 0.15, PME–PLE 0.08, MOQ length 0.37, width 0.28; leg formula: 1-2-3-4: leg I—femur 2.26/ patella 1.16/ tibia 1.75/ metatarsus 1.56/ tarsus 0.83/ total 7.56; II—2.05/ 0.98/ 1.50/ 1.35/ 0.87 6.75; III—1.74/ 0.72/ 1.44/ 1.46/ 0.73/ 6.09; IV—1.77/ 0.62/ 1.35/ 1.44/ 0.75/ 5.93. Total body length 5.18; prosoma length 2.51, width 2.44; opisthosoma length 2.67; clypeus height 0.54; sternum length 1.21, width 1.18; gnathocoxae length 0.54, width 0.34; labium length 0.65, width 0.35.

Etymology. The specific epithet is the combination of the

Greek noun “ carcino ”, meaning crab, and the suffix “oides”,

meaning resembling, used here to describe a spider that

looks like a crab due to its laterigrade legs and flattened

dorsal habitus.

Distribution. Morobe, Papua New Guinea; Queensland and

New South Wales, Australia ( Fig. 24 View Figure 24 ).

Variation. All examined specimens present pale-yellow

cuticle (preserved in ethanol), however, live specimens

may be greenish due to the accumulation of debris such as

lichen or moss.

R

Departamento de Geologia, Universidad de Chile

QM

Queensland Museum

V

Royal British Columbia Museum - Herbarium