Tasmanicosa leuckartii ( Thorell, 1870 )

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: 31-34

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.5676935

persistent identifier

http://treatment.plazi.org/id/0B32B23C-7B07-9F5D-BEF8-3937FCF2F9EF

treatment provided by

Plazi

scientific name

Tasmanicosa leuckartii ( Thorell, 1870 )
status

comb. nov.

Tasmanicosa leuckartii ( Thorell, 1870)   comb. nov.

Leuckart’s Wolf Spider, Hay Spider

( Figs 1E–F View FIGURE 1 , 3A View FIGURE 3 , 6D View FIGURE 6 , 7G View FIGURE 7 , 16 View FIGURE 16 , 17A–K View FIGURE 17 )

Tarentula leuckartii Thorell 1870: 388   –389.

Lycosa leuckartii (Thorell)   .— Koch 1877: 896 –899, pl. 77, figs 3, 3A; pl. 81, figs 1, 1A; Rainbow 1911: 269; Bonnet 1957: 2649; Main 1964: 120, figs E–F; McKay 1975: 320 –325, figs 1 A–E, 2 A–I, 3 E–F; McKay 1985: 79.

Lycosa molyneuxi Hogg 1905: 575   –577, figs 82, 82 A–B; Rainbow 1911: 270; Bonnet 1957: 2653; McKay 1973: 379; McKay 1975: 326 –328; McKay 1985: 80; Hirst 1988: 77; Platnick 1993: 488. New synonymy.

Lycosa leuckarti (Thorell)   .— Simon 1909: 182; Platnick 1993: 488.

Lycosa christopheri Simon 1909: 182   ; Rainbow 1911: 266; Bonnet 1957: 2638 (synonymy established in McKay, 1975).

Allocosa molyneuxi (Hogg)   .— Roewer 1955: 206.

Avicosa christopheri (Simon)   .— Roewer 1955: 236; Rack 1961: 37. Scaptocosa leuckartii (Thorell)   .— Roewer 1955: 291.

Schizocosa christopheri (Simon)   .— McKay 1973: 381.

Schizocosa leuckartii (Thorell)   .— McKay 1973: 381.

Type data. Lectotype (designated here) of Tarentula leuckartii   . Female, locality label fainted, possibly Echuka, =? Echuca, 36°08’S, 144°45’E (Victoria, AUSTRALIA), ‘ Leuckart ded.’, Collectio T. Thorell ( SMNH) (examined). GoogleMaps  

Paralectotype of Tarentula leuckartii   . Penultimate female, data as lectotype (examined).

Lectotype (designated here) of Lycosa christopheri   . Female, Fremantle [32°03’S, 115°44’E, Western Australia, AUSTRALIA], W. Wölting leg. 1907, H. Christopher ded. 1.vii.1907 ( ZMH, Rack (1961) -catalogue 448) (examined). GoogleMaps  

Paralectotype of Lycosa christopheri   . Juvenile, same data as lectotype (ZMH, Rack (1961) -catalogue 448) (examined).

Holotype of Lycosa molyneuxi   . Female, Gilbert River , Riverton [34°10’S, 138°45’E, South Australia, AUSTRALIA], A. Molineux ( SAM NN462) (examined). GoogleMaps  

Other material examined. 1,768 males, 764 females (29 females with eggsac, 41 females with spiderlings) and 619 juveniles in 957 records (Appendix B).

Diagnosis. Tasmanicosa leuckartii   is the only species in the genus which has a light patch of variable size in the centre of the venter ( Figs 17C–D View FIGURE 17 ). Genital morphology is similar to T. gilberta   and T. fulgor   . Males are most similar to T. gilberta   , but can be distinguished by the shape of the terminal apophysis, which is broad and apically bent in T. gilberta   ( Fig. 7H View FIGURE 7 ), but twisted in T. leuckartii   ( Fig. 7G View FIGURE 7 ) (that of T. fulgor   is broadly sickle-shaped without apical modifications ( Fig. 9J View FIGURE 9 )). Females are most similar to T. fulgor   ( Fig. 4H View FIGURE 4 ), but the epigyne is much shallower and overall narrower in T. leuckartii   ( Fig. 17G View FIGURE 17 ) (that of T. gilberta   has a much narrower median septum ( Fig. 4G View FIGURE 4 )). Care should be taken and genitalia examined in detail for each specimens when large series of pitfall trap material of T. leuckartii   are identified, as the species can be found sympatrically with T. godeffroyi   , T. gilberta   and T. fulgor   , all of which have been found as singletons within large numbers of T. leuckartii   in traps.

Description. Male (based on NMV K11541 View Materials ).

Total length 17.6.

Prosoma. Length 10.0, width 7.7; reddish-brown with genus-specific Union-Jack pattern and narrow median and lateral bands ( Fig. 17A View FIGURE 17 ); sternum very dark brown to black ( Fig. 17C View FIGURE 17 ).

Eyes. Diameter of AME 0.33, ALE 0.21, PME 0.81, PLE 0.73.

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

Labium. Black with lighter anterior rim ( Fig. 17C View FIGURE 17 ).

Endites. Glabrous dark brown, anteriorly somewhat lighter ( Fig. 17C View FIGURE 17 ).

Legs. Greyish-brown, covered with silvery setae; venter of coxae dark brown ( Fig. 17C View FIGURE 17 ).

Opisthosoma. Length 8.7, width 6.4; dorsally with folium pattern that is bordered by light patches in particular anteriorly ( Fig. 17A View FIGURE 17 ); venter black with light discolouration centrally ( Fig. 17C View FIGURE 17 ).

Pedipalps. Cymbium dorsally with dense layer of silvery setae; tip with ca. 7–10 macrosetae ( Figs 17E–F View FIGURE 17 ); tegular apophysis with almost straight ridge which is almost as long as tegular apophysis width ( Figs 6D View FIGURE 6 , 17J–K View FIGURE 17 ). Embolus broad at base, narrowing apically into a sharp tip; terminal apophysis tip flat and broad with subapical twist ( Figs 7G View FIGURE 7 , 17I View FIGURE 17 ).

Female (based on NMV K11546).

Total length 17.3.

Prosoma. Length 10.0, width 7.7; colouration of carapace and sternum as male, but with less distinct radial pattern on carapace ( Figs 17B, D View FIGURE 17 ).

Eyes. Diameter of AME 0.15, ALE 0.14, PME 0.77, PLE 0.65.

Chelicerae, labium, endites, legs and opisthosoma. Opisthosoma length 12.0, width 8.2, otherwise as male, but light ventral spot larger and more distinct ( Fig. 17D View FIGURE 17 ).

Epigyne. Longer than wide; median septum inverted T-shaped with irregular edges ( Fig. 17G View FIGURE 17 ); spermathecal heads kidney-shaped, situated laterally at half of the length of the epigyne length; spermathecal stalks twisted and bent ( Fig. 17H View FIGURE 17 ).

Remarks. Thorell (1870) listed two adult females in the original species description of T. leuckartii   ; however, only one of the two females in the syntype series is mature and here designated as lectotype to unequivocally fix the species-group name of the taxon. The female is redescribed here based on more recent material, as the lectotype is in poor condition.

McKay (1975) synonymised Lycosa christopheri Simon, 1909   with T. leuckartii   based on the examination of the (p. 320) ‘Holotype female, Hamburg. Zool. Mus. Inst. No. 448’. In contrast, Rack (1961: 37) listed a (translated from German), ‘♀syntype (damaged)’ as her ZMH catalogue no. 448. Her syntype designation may be due to the presence of an immature spider in the same vial. Simon’s (1909) original description of L. christopheri   shows that it was based on more than one specimen, as he gave a size range for the total length of the species, rather than a distinct size for a single specimen. We therefore support Rack’s (1961) assumption of a syntype series of the species consisting of a female and juvenile and here designate the female as lectotype to unequivocally fix the species-group name of this taxon.

McKay (1975) already pointed to the possibility that Lycosa molyneuxi   and T. gilberta   may represent junior synonyms of T. leuckartii   . This is confirmed here for L. molyneuxi   , of which the holotype female conforms to the species diagnosis of T. leuckartii   as presented here. Lycosa molyneuxi   is here considered a junior synonym of T. leuckartii   . The original type locality for L. molyneuxi   , ‘Gilbert River, Riverina   , New South Wales’ was amended to a South Australian locality by Hirst (1988).

We consider the correct original spelling for the species-group name of Leuckart’s wolf spider to be T. leuckartii   rather than T. leuckarti   . This is in accordance with article 33.4 in the fourth edition of the International Code of Zoological Nomenclature ( ICZN 1999), which states the change from - ii to - i is a subsequent incorrect spelling.

Life history and habitat preferences. Habitat preferences of T. leuckartii   are typical for those in the genus Tasmanicosa   , with records from a variety of forest and bushland habitats (Yate, River Red Gum, Black Box, old growth mallee, Casuarina   , Callitris, Acacia   ) to semi-arid grasslands and paddocks. However, this species appears to be more common than other Tasmanicosa   species in floodplains or near permanent to ephemeral waterbodies of varying salinity. Frequent habitat descriptions included samphire, saltbush country, river terrace, alluvial flats and clayey soil with crab holes. This is consistent with McKay’s (1975: 323) habitat description of ‘lateritic gravels, loam, or clay soils, especially on alluvial clay soils near swamps, streams, and on riverbanks’ and Main (1976) detailing ‘dry open woodland and forest with expanses of bare to lightly littered ground; invade dry pasture and crop.’

Burrows of T. leuckartii   are shallow with depth ranging from approximately 60 to 110 mm in a study on South Australian floodplain populations. Burrow depth increased over summer apparently counteracting increasing temperatures, but there was no direct correlation with decreasing soil moisture ( Steggles 2001; Steggles et al. 2003). Burrow fidelity was low in this study, with spiders frequently vacating but also re-occupying empty burrows. Apparently, spiders take advantage of soil fissures in cracking clays that provide ample opportunity as day-time hideouts ( Steggles et al. 2003). Laboratory studies confirmed that an association with burrows was highest in reproductive females ( Steggles et al. 2003). The senior author of this study (VWF) has found T. leuckartii   females building a thin, trapdoor-like lid on their burrow in Quorn (South Australia).

With a similar distribution pattern, the phenology of T. leuckartii   appears to be very similar to that of T. godeffroyi   . Females with eggsac were found predominantly between January and April, with single records from June and October. Consistent with this, most females carrying spiderlings were found in April, but also in January to March and May to June.

In some areas T. leuckartii   is called the hay spider because of its abundance around stooks and bales of cut hay where it is a nuisance to farm workers ( Main 1976).

Recent experiments on the effect of T. leuckartii   as natural control agents for the cotton bollworm, Helicoverpa armigera (Hübner, 1808)   , indicated that these spiders can be effective predators of the cotton bollworm late instars and moths, but also suggested that, under some conditions, the presence of spiders could increase the damage to individual cotton bolls ( Rendon et al. 2016).

Distribution. Tasmanicosa leuckartii   is very common south of approximately 25°S Latitude in New South Wales, South Australia and Western Australia ( Fig. 16 View FIGURE 16 ). Records in southern Victoria and Tasmania are rare and the species has only occasionally been found in Queensland.

SMNH

Saskatchewan Museum of Natural History

ZMH

Zoologisches Museum Hamburg

SAM

South African Museum

NMV

Museum Victoria

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Lycosidae

Genus

Tasmanicosa

Loc

Tasmanicosa leuckartii ( Thorell, 1870 )

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

Schizocosa christopheri

McKay 1973: 381
1973
Loc

Schizocosa leuckartii

McKay 1973: 381
1973
Loc

Allocosa molyneuxi

Roewer 1955: 206
1955
Loc

Avicosa christopheri

Rack 1961: 37
Roewer 1955: 236
Roewer 1955: 291
1955
Loc

Lycosa leuckarti

Platnick 1993: 488
Simon 1909: 182
1909
Loc

Lycosa christopheri

Bonnet 1957: 2638
Rainbow 1911: 266
Simon 1909: 182
1909
Loc

Lycosa molyneuxi

Platnick 1993: 488
Hirst 1988: 77
McKay 1985: 80
McKay 1975: 326
McKay 1973: 379
Bonnet 1957: 2653
Rainbow 1911: 270
Hogg 1905: 575
1905
Loc

Lycosa leuckartii

McKay 1985: 79
McKay 1975: 320
Main 1964: 120
Bonnet 1957: 2649
Rainbow 1911: 269
Koch 1877: 896
1877
Loc

Tarentula leuckartii

Thorell 1870: 388
1870