Tasmanicosa gilberta ( Hogg, 1905 )

Framenau, Volker W. & Baehr, Barbara C., 2016, Revision of the Australian Union-Jack wolf spiders, genus Tasmanicosa (Araneae, Lycosidae, Lycosinae), Zootaxa 4213 (1), pp. 1-82: 22-23

publication ID

http://doi.org/10.11646/zootaxa.4213.1.1

publication LSID

lsid:zoobank.org:pub:9C76B987-3897-4666-87EF-62EB5BF5CF04

DOI

http://doi.org/10.5281/zenodo.5676927

persistent identifier

http://treatment.plazi.org/id/0B32B23C-7B0C-9F6A-BEF8-3A2CFE4DF8CF

treatment provided by

Plazi

scientific name

Tasmanicosa gilberta ( Hogg, 1905 )
status

comb. nov.

Tasmanicosa gilberta ( Hogg, 1905)   comb. nov.

Gilbert’s wolf spider

( Figs 3H View FIGURE 3 , 4G View FIGURE 4 , 10 View FIGURE 10 , 11A–L View FIGURE 11 )

Lycosa gilberta Hogg 1905: 582   –584, figs 86, 86A–B; Rainbow 1911: 268; Bonnet 1957: 2643; McKay 1973: 379; McKay 1975: 325 –326, figs 3A–D; McKay 1985: 77; Hirst 1988: 77; Platnick 1993: 487.

Lycosa hasseltii L. Koch.   — Karsch 1878: 795 (misidentification of ZMB 2792; VWF examined).

Venonia gilberta (Hogg)   .— Roewer, 1955: 307.

Hogna gilberti (Hogg)   .— Roewer 1960: 975 (misspelled).

Hogna gilberta (Hogg)   .— Roewer, 1961: 13.

Type data. Lectotype. Female, Riverton, Gilbert River (34°10’S, 138°45’E, South Australia, AUSTRALIA), A. Molineux ( SAM NN039) (designated byMcKay, 1975) (examined). GoogleMaps  

Paralectotypes. Female, same data as lectotype ( SAM NN040) GoogleMaps   ; paralectotype female, same data as lectotype ( SAM NN041) (all examined) GoogleMaps   ; 2 paralectotype females, data as lectotype, not found in SAM collection (not examined).

Other material examined. 174 males, 217 females (11 with eggsac, 10 with spiderlings) and 27 juveniles in 272 records (Appendix B).

Diagnosis. Care must be taken when identifying T. gilberta   ( Fig. 11 View FIGURE 11 ) as these spiders are very similar to T.

fulgor   ( Fig. 10 View FIGURE 10 ) and T. leuckartii   ( Fig. 17 View FIGURE 17 ), in particular if the ventral light patch of the opisthosoma is poorly developed in T. leuckartii   . All three species have been found sympatrically and in large pitfall trap series of one species, each of the other one was often represented by single specimens. Males of T. gilberta   differ from those of T. fulgor   by the straight ventral edge of the tegular apophysis ( Fig. 11L View FIGURE 11 ), which is shallow U-shaped in T. fulgor   ( Fig. 9L View FIGURE 9 ). Males of T. gilberta   and T. leuckartii   are best distinguished by the shape of the terminal apophysis, which is broad and flat with an apical bent tip in T. gilberta   ( Fig. 7H View FIGURE 7 ), but apically twisted in T. leuckartii   ( Fig. 7G View FIGURE 7 ). Females of T. gilberta   differ from both T. fulgor   and T. leuckartii   by the much narrower median septum, which forms a sharp edge in particular anteriorly ( Fig. 11G View FIGURE 11 ).

Description. Male (based on QM S70800 View Materials ).

Total length 22.3.

Prosoma. Length 11.7, width 9.4; carapace brown with genus-specific Union-Jack pattern and distinct median and broad marginal light bands ( Fig. 11A View FIGURE 11 ); sternum dark brown ( Fig. 11C View FIGURE 11 ).

Eyes. Diameter of AME 0.40, ALE 0.28, PME 0.83, PLE 0.81.

Chelicerae. Black with an elongated patch of golden setae frontally.

Labium. Black, anterior edge brown ( Fig. 11C View FIGURE 11 ).

Endites. Glabrous dark brown ( Fig. 11C View FIGURE 11 ).

Legs. Greyish-brown, covered with few silvery setae; venter of coxae dark brown ( Fig. 11C View FIGURE 11 ).

Opisthosoma. Length 8.2, width 5.1; dorsally brownish-grey with folium pattern of indistinct triangles ( Fig. 11A View FIGURE 11 ), venter black ( Fig. 11C View FIGURE 11 ).

Pedipalps. Cymbium dorsally with dense layer of silvery setae; apically with ca. 10 macrosetae ( Figs 11E–F View FIGURE 11 ); tegular apophysis with straight ridge of little more than half of tegular apophysis width, ventral process with double-tip ( Figs 11K–L View FIGURE 11 ), embolus sickle-shaped with narrow tip, terminal apophysis broad with ventrally bent tip ( Figs 11I –J View FIGURE 11 ).

Female (based on QM S70800).

Total length 17.9.

Prosoma. Length 8.7, width 5.8. Colouration of carapace and sternum as male ( Figs 11B, D View FIGURE 11 ).

Eyes. Diameter of AME 0.37, ALE 0.32, PME 0.77, PLE 0.75.

Chelicerae, labium, endites, legs and opisthosoma. Opisthosoma length 9.3, width 5.6; otherwise as male ( Figs 11B, D View FIGURE 11 ).

Epigyne. Approximately 1.3 times longer than wide; medium septum inverted T-shaped with very thin median septum ( Fig. 11G View FIGURE 11 ), spermathecal heads small and oval and situated laterally of posterior transverse part, spermathecal stalks short and straight ( Fig. 11H View FIGURE 11 ).

Remarks. Hogg (1905) in his original description and subsequently McKay (1975, 1985) listed five syntype females, but only three were found at the SAM. The type locality “Gilbert R. Riverina   ”, originally believed to be in New South Wales was subsequently amended by Hirst (1988) to “Gilbert River, Riverton” located in South Australia.

Life history and habitat preferences. Tasmanicosa gilberta   appears to prefer open habitats and seems to be somewhat salt tolerant; habitat descriptions on locality labels include sandy clay-loam plain, sand plain, remnant native grassland, paddock, grazed pasture, mallee, chenopod saltbush, Callitris   woodland, and Box-Ironbark forest. Similar to most other Tasmanicosa   species, mature males have been found between September and May with highest numbers in December and January. Females were recorded throughout the year with highest numbers between December and March. Females carrying an eggsac were found mainly in February and March with one record from May.

Tasmanica   gilberta   has been reported as ‘burrow stealers’ as this species apparently utilizes burrows of T. ramosa   (reported as T. stirlingae   ) in a study north of Adelaide ( McCullough 2000).

Distribution. Tasmanicosa gilberta   is found along the southern coast of Australia, generally south of 30°S Latitude, with few isolated records further north in South Australia, New South Wales and Queensland ( Fig. 10 View FIGURE 10 ). The species appears to be absent in the most south-eastern parts of the continent (i.e. western Victoria) and has not been found in Tasmania.

ZMB

Museum f�r Naturkunde Berlin (Zoological Collections)

SAM

South African Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Lycosidae

Genus

Tasmanicosa

Loc

Tasmanicosa gilberta ( Hogg, 1905 )

Framenau, Volker W. & Baehr, Barbara C. 2016
2016
Loc

Hogna gilberta

Roewer 1961: 13
1961
Loc

Hogna gilberti

Roewer 1960: 975
1960
Loc

Venonia gilberta

Roewer 1955: 307
1955
Loc

Lycosa gilberta

Platnick 1993: 487
Hirst 1988: 77
McKay 1985: 77
McKay 1975: 325
McKay 1973: 379
Bonnet 1957: 2643
Rainbow 1911: 268
Hogg 1905: 582
1905
Loc

Lycosa hasseltii

Karsch 1878: 795
1878