Tetralycosa orariola, Framenau & Hudson, 2017

Framenau, Volker W. & Hudson, Peter, 2017, Taxonomy, systematics and biology of the Australian halotolerant wolf spider genus Tetralycosa (Araneae: Lycosidae: Artoriinae), European Journal of Taxonomy 335, pp. 1-72 : 28-31

Tetralycosa orariola sp. nov.

urn:lsid:zoobank.org:act:6F8133B4-6684-49CD-95D7-2A2269FAAB90

Figs 10 A–D; 11A–E; 13

Diagnosis

Tetralycosa orariola sp. nov. is very similar to T. oraria (see Diagnosis there).

Etymology

The specific epithet is an adjective in apposition and the Latin diminutive of ‘ oraria ’ (‘ orarius ’, coastal), referring to the very similar but larger species T. oraria .

Type material

Holotype

AUSTRALIA: ♂, Western Australia, Kulunilup Nature Reserve, Wittenoom Road , 34°20′00″ S, 116°48′03″ E, wet pitfall trap, CALM Salinity Action Plan, site UN8, 15 Oct. 1999 – 1 Nov. 2000, N.A. Guthrie leg. ( WAM T62787 ).

Paratypes

AUSTRALIA: 1 ♀, data as holotype ( WAM T62788); 4 ♂♂, 3 ♀♀, data as holotype ( WAM T47203); 1 ♂, data as holotype ( WAM T62321).

Other material examined

AUSTRALIA, Western Australia: 6 ♂♂, 8 ♀♀, Camel Lake Nature Reserve, 34°15′50″ S, 117°57′49″ E ( WAM T47214–5); 4 ♂♂, 3 ♀♀, Coolinup Nature Reserve, 33°34′02″ S, 122°17′55″ E ( WAM T47216); 1 ♂, 1 ♀, Coyrecup Lake Nature Reserve, 33°43′12″ S, 117°05′54″ E ( WAM T47160); 2 ♀♀, Dragon Rocks Nature Reserve, 32°38′40″ S, 118°59′11″ E ( WAM T47151–2); 1 ♀, Duke of Orleans Bay Caravan Park, 33°56′ S, 122°35′ E ( WAM T47246); 1 ♂, Fitzgerald River (no exact location) ( WAM T51416); 19 ♂♂, 4 ♀♀, 6 juvs, Gulson Lake Nature Reserve, 32°45′57″ S, 119°24′40″ E ( WAM T47158, T47202); 1 ♀, Kulunilup Nature Reserve, 34°20′00″ S, 116°48′03″ E ( WAM T47150); 18 ♂♂, 6 ♀♀, 1 juv., Lake Bryde West Nature Reserve, Lake Bryde Road, 33°21′40″ S, 118°48′14″ E ( WAM T47209); 19 ♂♂, 3 ♀♀, Lake Goorly, 29°56′08″ S, 116°53′09″ E ( WAM T47211); 2 ♂♂, 1 ♀, Lake Ninan Shire Reserve, 30°56′31″ S, 116°38′28″ E ( WAM T47207); 1 ♂, Mortlock Creek, Wongan Hills, 30°45′ S, 116°38′ E ( WAM 99/1102); 1 ♀, near Lort River, North Rollands Road, W of Grass Patch, 33°12′20″ S, 121°18′08″ E ( WAM T47212); 2 ♂♂, 1 juv., Ongerup, 2 miles E of Ongerup, 33º57′ S, 118º30′ E ( WAM T53858); 7 ♂♂, 8 ♀♀, Wittenoom Hill Nature Reserve, Wittenoom Road, 33°28′11″ S, 122°00′50″ E ( WAM T47149, T47201); 2 ♂♂, 2 ♀♀, 2 juvs, Wittenoom Road, near junction with Dempster Road, 33°38′15″ S, 122°00′50″ E ( WAM T47206).

Description

MEASUREMENTS. ♂ holotype, WAM T62787 (♀ paratype, WAM T62788): TL 7.58 (8.55), CL 4.35 (4.50), CW 3.15 (3.45). Eyes: AME 0.20 (0.20), ALE 0.18 (0.14), PME 0.34 (0.40), PLE 0.32 (0.30). Row of eyes: AE 0.89 (1.00), PME 0.89 (0.96), PLE 1.23 (1.20). Sternum length/width: 1.95/1.65 (1.80/1.65). Labium length/width: 0.54/0.63 (0.57/0.74). AL 3.15 (4.05), AW 2.55 (3.45). Legs: Lengths of segments (femur + patella/tibia + metatarsus + tarsus = total length): Pedipalp 1.65+1.50+ – +1.35 = 4.50, I 3.30+4.20+3.15+1.73 = 12.38, II 3.30+4.20+3.45+1.73 = 12.68, III 3.00+3.53+3.08+1.50 = 11.11, IV 3.75+4.50+4.05+1.80 = 13.95 (Pedipalp 1.58+1.50+ – +1.13= 4.21, I 3.00+3.60+2.40+1.50 = 10.50, II 3.00+3.30+2.55+1.35 = 10.20, III 2.85+3.00+2.40+1.35= 9.60, IV 3.75+4.20+3.75+1.73 = 13.43).

VARIATION. ♂ (♀) (range, mean ± SD): TL 5.10–11.25, 6.92 ± 1.66; CL 3.00–4.50, 3.64 ± 0.44; CW 2.10– 3.45, 2.70 ± 0.37; n = 16 (TL 6.15–10.20, 8.14 ± 1.51; CL 3.15–4.80, 3.84 ± 0.52; CW 2.25–3.30, 2.94 ± 0.34; n = 14).

Male (based on holotype, WAM T62787)

CARAPACE ( Fig. 10A ). Dorsal line straight in lateral view; dark brown with a dark radial pattern; irregular light brown median band and thin but continuous and undulating light brown lateral bands; covered with

mainly black setae, but white setae in median and lateral bands; black macrosetae in eye region, mainly around PE; four long bristles below AE; one long bristle between AME.

EYES. Row of AE of same width as row of PME; row of AE slightly procurved.

CHELICERAE. Dark reddish-brown; covered with white setae and few brown macrosetae centrally; three promarginal teeth with the median largest; three retromarginal teeth of similar size.

STERNUM ( Fig. 10B ). Brown with grey pigmentation; covered with brown setae that are longer towards margins.

LABIUM. Dark brown; front end truncate and white. PEDIPALPS ( Fig. 11 A–C). Tegular apophysis broad with a basally pointing tip ( Fig. 11A ); terminal apophysis forms shaft with broad edges; embolus long and thin, tip curved apically ( Fig. 11C ).

ABDOMEN. Very dark olive-grey; yellow-grey lanceolate heart mark in anterior half; one pair of yellowgrey patches in posterior half; covered with black setae and fewer macrosetae, white setae in heart mark and posterior patches ( Fig. 10A ). Ventrally olive-grey with white and fewer brown setae. Spinnerets olive-brown ( Fig. 10B ).

LEGS. Leg formula IV>II>I>III; brown with dark annulations; base of femora yellow-brown. Spination of leg I: femur: three dorsal, one apicoprolateral, two retrolateral; patella: one prolateral, 1 retrolateral; tibia: one dorsal, three ventral pairs, two prolateral, two retrolateral; metatarsus: three ventral pairs, two prolateral, two retrolateral, one apicoventral, one apicoprolateral, one apicoretrolateral.

Female (based on paratype, WAM T62788)

CARAPACE ( Fig. 10C ). Shape, colouration and setae as male; however, the left lateral band is dissolved into single light patches.

EYES. Row of AE wider than row of PME; row of AE slightly procurved.

CHELICERAE. Colouration and setae as male; three promarginal teeth with the median largest; three retromarginal teeth of similar size on left chelicera, one additional small apical tooth on right chelicera.

STERNUM AND LABIUM ( Fig. 10D ). As male.

ABDOMEN. As male, however, indistinctly mottled dark and light grey ( Fig. 10C ). Venter and spinnerets as male ( Fig. 10D ).

EPIGYNE. Ventral view ( Fig. 11D ): ovoid median septum with curved posterior border. Dorsal view ( Fig. 11E ): narrow, elongated spermathecal heads.

LEGS. Leg formula IV>I>II>III. Colour pattern as male, however basal third of femora not lighter. Spination of leg I: femur: three dorsal, one apicoprolateral (two on right leg); tibia: three ventral pairs, two prolateral, one apicoventral.

Life history and habitat preferences

Tetralycosa orariola sp. nov. has mainly been collected at a variety of sites of the Avon Wheatbelt Survey (‘Salinity Action Plan’) of the Department of Conservation and Land Management (CALM) (today called Department of Parks and Wildlife, Western Australia) near ephemeral, often saline lakes ( Harvey et al. 2004; Keighery et al. 2004). The long-term exposure of the pitfall traps during the survey does not allow an interpretation of the phenology of this species.

Distribution

South-west Western Australia ( Fig. 13 ).

Figures

Fig. 10. Tetralycosa Roewer, 1960, microscopic photographs showing dorsal and ventral views. A–B. T. orariola sp. nov., ♂, holotype (WAM T62787). C–D. T. orariola sp. nov., ♀, paratype (WAM T62788). E–F. T. wundurra (McKay, 1979), ♂ (WAM T70503). G–H. T. wundurra (McKay, 1979), ♀ (WAM T70296). Scale bars: A–H = 2.00 mm.

Fig. 11. Tetralycosa orariola sp. nov., ♂, holotype (WAM T62787) and ♀, paratype (WAM T62788). A–B. Left male pedipalp, ventral and retrolateral view. C. Left male pedipalp, palea section of bulbus, ventral view. D–E. Female epigyne, ventral and dorsal views. Scale bar: A–B = 1.09 mm; C = 0.57 mm; D–E = 0.78.

Fig. 13. Tetralycosa orariola sp. nov. and T. wundurra (McKay, 1979) comb. nov., distribution records in Australia.