Artoria pinnata, Do Prado & Baptista & Framenau, 2024

Do Prado, André W., Baptista, Renner Luiz Cerqueira & Framenau, Volker W., 2024, Taxonomy of the wolf spider genus Artoria in Western Australia (Araneae, Lycosidae, Artoriinae), Zootaxa 5547 (1), pp. 1-81 : 51-55

Artoria pinnata sp. nov.

Figs 26–28

urn:lsid:zoobank.org:act:73170133-E1BF-48F5-A882-F37BBAD53F82

Type material. Holotype male, Mt Ragged , Cape Arid National Park, Western Australia, AUSTRALIA, 33º26’46’’S, 123º28’25’’E, 27 September 1995 ( WAM T69496 ).

Other material examined (11 males, 5 females in 6 records). AUSTRALIA, Western Australia : 2 females,

Helms Arboretum Reserve, Brockway Road, 33º43’42’’S, 121º47’50’’E ( WAM T68466) ; 1 female, same locality ( WAM T162974 ) ; 1 male, Lake Morgan , Helms Arboretum Reserve, 33º43’9’’S, 121º48’29’’E ( WAM T68283 ) ; 1 female, same locality ( WAM T162523 ) ; 1 male, Porongurup National Park , Nancy Peak, 34º40’56’’S, 117º31’59’’E ( WAM T99214 ) ; 1 male, Recherche Archipelago , Middle Island, 34º05’43.17’’S, 123º11’40.51’’E ( WAM T95715 ) ; 1 male, Talyuberlup Picnic Site , Stirling Range National Park, 34º24’56’’S, 117º57’18’’E ( WAM T68706 ) ; 8 males, 1 female, Wittenoom Road , near junction with Dempster Road, 33º38’18’’S, 122º00’50’’E ( WAM T68285 ) .

Etymology. The specific epithet “ pinnata ” is a Latin adjective meaning ‘similar to a fin’ and refers to the profile of the tegular apophysis in ventral view that resembles a fish’s forked caudal fin.

Diagnosis. The tegular apophysis of the male pedipalp of A. pinnata sp. nov. is similar to that of A. equipalus with two rounded and large distal lobes, but they differ by the position of the lobes, with the inner surfaces facing each other in A. pinnata sp. nov. ( Fig. 27C, D ), while they both face ventrally in A. equipalus ( Framenau & Baehr 2018: fig. 18E). In addition, males of A. pinnata sp. nov. have a much smaller subtegulum in ventral view and a larger basoembolic apophysis ( Fig. 27C–E ). Females of A. pinnata sp. nov. differ from all other known Artoria by their epigyne bearing long lateral lobes without guide pockets and with sinuous mesal margins delimiting a subrectangular and flat median septum, which is almost as long as the whole epigyne ( Fig. 28C ).

Description. Male (holotype, WAM T69496).

Total length, 4.32. Carapace, length 2.40, width 1.82, reddish-brown, with a paler median longitudinal band, and lateral darker bands ( Fig. 27A ). Sternum, orange-brown ( Fig. 27B ). Eyes, diameter of AME: 0.07; ALE: 0.07; PME: 0.26; PLE: 0.20, anterior eye row procurved, evenly spaced. Chelicerae, reddish-brown with irregular dark brown streaks, three retromarginal and three promarginal teeth, median largest. Labium, orange-brown, with pale anterior rim ( Fig. 27B ). Legs, background colour orange-brown, with femur, patella, tibia, and metatarsus mostly dark grey stained, femur darker, and tarsus orange-brown ( Fig. 27A, B ). Opisthosoma, length 1.84, width 1.50. Dorsum mostly dark grey and covered with black setae, except for the pale brown cardiac mark covered with pale setae, slightly surpassing ⅔ of the opisthosoma length, and for pale brown small patches and streaks, and four welldemarcated sigilla ( Fig. 27A ). Venter mostly dark yellow with spinnerets dark brown ( Fig. 27B ).

Pedipalp ( Fig. 27C–E ), tibia globular, cymbium free tip as long as ⅓ of whole cymbium in ventral view; subtegulum very sclerotized and relatively slim in ventral view. Tegular apophysis subdivides distally into two broad and mostly rounded lobes with inner surfaces facing each other sharing an inner concavity; apex of the retrolateral lobe with an acute tip ( Fig. 27D ). Basoembolic apophysis wider than long, triangular in ventral view, large and very sclerotized. Embolus semi-circular, broad, and flat, ending in a truncated tip. Terminal apophysis heavily sclerotized, as wide as the embolus, and mostly covered by the embolus in ventral view, leaving its acute and dark apex visible.

Female (WAM T68466A).

Total length, 3.74. Carapace, length 2.17, width 1.53, colouration like male ( Fig. 28A ). Sternum, reddish-brown ( Fig. 28B ). Eyes, diameter of AME 0.07, ALE 0.06, PME 0.22, PLE 0.19, anterior eye row like male. Chelicerae, reddish-brown, teeth pattern as in male. Labium, dark brown, with pale anterior rim ( Fig. 28B ). Legs, background colour orange-brown with ringed dark grey stains throughout the articles, except of the tarsi ( Fig. 28A, B ). Opisthosoma, length 1.71, width 1.51. Colour pattern like male, except for the dorsum with a conspicuous pale brown rectangular patch, placed horizontally at the end of the cardiac mark, occupying most of the width of the opisthosoma ( Fig. 28A ), and the venter with pale brown spinnerets ( Fig. 28B ).

Epigyne, wider than long, atrium and median septum rectangular, flat, almost as long as the epigyne, delimited by lateral lobes which have elevated long and sinuous mesal margins ( Fig. 28C ). Spermathecal heads globular, about two diameters apart; spermathecal stalks with about twice spermathecal diameter in length, attached ectally and gradually bending mesally ( Fig. 28D ).

Variation. Body length: Males (n=5): 3.51–4.82; Females (n=5): 3.38–4.58.

Life history and habitat preferences. Mature males and females were collected between September and December, suggesting A. pinnata sp. nov. to be a spring mature species. There was no habitat information with the few specimens in the WAM.

Distribution. Southern Western Australia, close to the coast ( Fig. 26 ).

Figures

FIGURE 26. Distribution of Artoria pileata sp. nov., Artoria pinnata sp. nov., Artoria plicata sp. nov., Artoria retorta sp. nov., and Artoria schizocoides Framenau & Hebets, 2007.

FIGURE 27. Artoria pinnata sp. nov., male: A, dorsal habitus; B, ventral habitus; C–E, left pedipalp (C, ventral view; D, retrolateral view; E, embolic division, ventral view). A–D, holotype (WAM T69496); E, (WAM T68706). Scale bars: A, B, 2.0 mm; C–E 0.2 mm.

FIGURE 28. Artoria pinnata sp. nov., female: A, dorsal habitus; B, ventral habitus; C, epigyne; D, internal genitalia, dorsal view. A–C, (WAM T162974); D, (WAM T62523). Scale bars: A, B, 2.0 mm; C, D, 0.2 mm.