Atrax adelaidensis

Gray, Michael R., 2010, A Revision of the Australian Funnel-web Spiders (Hexathelidae: Atracinae), Records of the Australian Museum 62 (3), pp. 285-392: 386-387

publication ID

http://doi.org/ 10.3853/j.0067-1975.62.2010.1556

persistent identifier

http://treatment.plazi.org/id/163F87D5-FF8E-FFC3-C41D-96B35564FB5E

treatment provided by

Felipe

scientific name

Atrax adelaidensis
status

 

adelaidensis   species group

Description (Figs. 103–104; Tables 32–33). Small atracinae (CL 5.4–6.9). Burrow entrance without triplines, with sidechamber closed by a trap-door. Carapace broad, strongly raised. Labium and sternum wide. Serrula absent. Cheliceral groove narrow with long central tooth row. STC teeth few (8–9). Male femora I, II with dorsal spines or bristles. Males without leg II apophyses; leg I modified (incrassate tibia and metatarsus) or unmodified. Male palpal tibia bulbous basally; patella wider than femur.

Included species. Hadronyche adelaidensis (Gray)   , H. flindersi (Gray)   , H. eyrei (Gray)   .

Distribution. Limited to the Gulf Ranges region of South Australia.

adelaidensis   ( black squares) and A. eyrei   (closed circles). side chamber with a robust soil door and a simple collapsible, collar-like silk entrance opening in or under lear litter in open forest and woodland habitats (Main, 1976; Gray, 1984). The Types. Holotype female: AMS KS983, Mt. Remarkable (lower slopes),  

3km north of Melrose, Flinders Range , South Australia, 32°47'S 138°04'E, burrows lack surface triplines. Interestingly, juveniles of GoogleMaps  

23 April 1973, M. and G. Gray. Paratype male:AMS KS980, same data as H. adelaidensis   make burrows that lack side chambers but holotype, 25 April 1973. have well-formed, flap-like surface trapdoors (Gray, 1984). These spiders are separated from the main eastern Diagnosis. CL 5.4–6.9 (male and female). Small atracine distribution of the Atracinae   by the dry shrublands/ spiders Males differ from H. adelaidensis   by row of strong woodlands of the southern Murray Basin ( Fig. 2 View Figure 2 ). They may dorsal spines (8–9) on femur I; and tibia I, II with 6–9 originally have been isolated as a western atracine population spines. Male palp with straight, slender embolus. and 12–16 during a Tertiary marine incursion into the Murray Basin. spines on patella. Male tarsi III, IV weakly swollen. Females with moderately slender spermathecae with a subapical

Hadronyche flindersi (Gray)   constriction; few prolateral spines on tibia III (8–9).

Figures 103–105; Table 32

Atrax flindersi Gray, 1984: 446   .

Hadronyche flindersi   .–Gray, 1988: 114.

Distribution. The southern end of the Flinders Ranges, South Australia ( Fig. 105 View Figure 105 ).

Comments. Female burrow with juvenile spiders in side passage closed by trapdoor in April, 1973.

Hadronyche adelaidensis (Gray)   tibia I, II (0–2), and absence of dorsal spines (bristles only) on femur I. Male palp with short, broad embolus. Females Figures 105 View Figure 105 –107; Table 33 are distinguished by strongly dilated spermathecae; and numerous prolateral spines on patella III (18–26).

Atrax adelaidensis   . Gray, 1984: 442. Distribution. Mount Lofty Ranges and the Adelaide region,

Hadronyche adelaidensis   .–Gray, 1988: 114. South Australia ( Fig. 105 View Figure 105 ).

Types. Holotype female: N1979146 ( SAM). Hackney , Adelaide, South Comments. Williams & Goode (1978) found evidence that Australia, 34°54'S 138°37'E, 16 November 1973, J. Batt GoogleMaps   . Paratype male:

N1979145 (SAM). St. Peters C.G.S. Adelaide, South Australia, 3 June the Miocene Murray River in South Australia may have run 1971, D. Edwards. west into the Spencer Gulf south of Port Pirie, before its flow was diverted southward near Morgan. The progenitor Diagnosis. CL 5.5–6.8 (male and female). Small atracine populations of H. adelaidensis   and H. flindersi   may have spiders. Males differ from H. flindersi   by presence of speciated on either side of a barrier formed by the ancient incrassate tibia I and metatarsus I, reduced spination on Murray River in South Australia.

SAM

South African Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Atracidae

Genus

Atrax