Tasmanicosa subrufa ( Karsch, 1878 )
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|Tasmanicosa subrufa ( Karsch, 1878 )|
Tasmanicosa subrufa ( Karsch, 1878) comb. nov.
Tasmanian Union-Jack wolf spider
Type data. Syntypes. 2 females (one without opisthosoma), Vandiemensland (= Tasmania, AUSTRALIA), Schayer ( ZMB 1962 View Materials ) (examined).
Other material examined. 27 males, 63 females (three with eggsac and two with spiderlings) and 14 juveniles in 75 records (see Appendix B).
Diagnosis. Males and females of T. subrufa resemble T. ramosa and T. semicincta in having a tegular apophysis with an extremely long ventral process and corresponding long epigyne, but can easily be distinguished from these species by colouration. Whereas the venter of T. subrufa is entirely black, it has a limited triangular black patch in T. ramosa (which also has a very distinctive dorsal opisthosoma pattern of transverse white lines) and is limited to a black transverse band behind the epigastric furrow in T. semicincta .
Description.Male (based on QM S66654 View Materials ).
Total length 15.8.
Prosoma. Length 9.3, width 7.2; carapace dark brown with genus-specific Union-Jack pattern and distinct narrow median and marginal light bands ( Fig. 27A View FIGURE 27 ); sternum dark brown ( Fig. 27C View FIGURE 27 ).
Eyes. Diameter of AME 0.34, ALE 0.39, PME 0.76, PLE 0.68.
Chelicerae. Dark brown with an elongated patch of golden setae frontally.
Labium. Glabrous dark brown with light brown anterior rim ( Fig. 27C View FIGURE 27 ).
Endites. Glabrous dark brown ( Fig. 27C View FIGURE 27 ).
Legs. Uniformly light brown, covered with silvery setae; coxae dark brown ( Fig. 27C View FIGURE 27 ).
Opisthosoma. Length 9.0, width 5.3; dorsally with folium pattern anteriorly and thin, transverse light wavy lines posteriorly ( Fig. 27A View FIGURE 27 ); venter very dark brown to black ( Fig. 27C View FIGURE 27 ).
Pedipalps. Cymbium dorsally covered with a dense layer of silvery setae; tip with 3–5 macrosetae ( Figs 27E– F View FIGURE 27 ); ridge of tegular apophysis exceeding tegular apophysis width, ventral process very long ( Figs 27J–K View FIGURE 27 ); embolus thin; terminal apophysis broad, flat with slightly notched tip ( Fig. 27I View FIGURE 27 ).
Female (based on QM S66654).
Total length 19.7.
Prosoma. Length 11.1, width 8.3; carapace and sternum colouration as male ( Figs 27B, D View FIGURE 27 ).
Eyes. Diameter of AME 0.35, ALE 0.38, PME 0.83, PLE 0.70.
Chelicerae, labium, endites, legs and opisthosoma. Opisthosoma length 9.5, width 6.5; otherwise as male, but chelicerae without frontal patch of golden setae ( Figs 27B, D View FIGURE 27 ).
Epigyne. Approximately two and a half times longer than wide, median septum inverted T-shaped, medially widened and gently curved anteriorly and generally asymmetrical ( Fig. 27G View FIGURE 27 ); spermathecal heads small, situated approximately at one third distance from epigyne base; spermathecal stalks slightly S-shaped ( Fig. 27H View FIGURE 27 ).
Remarks. The syntypes of T. subrufa were initially dry-pinned and subsequently transferred into 70% ethanol. The colour pattern is not well preserved and therefore the species is redescribed from representative fresh specimens.
Life history and habitat preferences. The few records of T. subrufa with some description of their habitat are not very conclusive in relation to habitat preferences for the species. They include sand hill on paddock, sandy ground, sphagnum moss, tussock grassland, wet sclerophyll forest and east-facing slope. Mature males of T. subrufa have been found from November to March with a peak in December and mature females mainly from November to May, with few records from August and September. Females with eggsac were found in December and March and those with spiderlings in February.
Distribution. Tasmanicosa subrufa has mainly been recorded from Tasmania, but there are isolated records on the Australian mainland coast from Tuross (New South Wales), Port Lincoln and Kangaroo Hill (South Australia) and Warrnambool (Victoria) ( Fig. 28 View FIGURE 28 ).
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