Australian Journal of
Taxonomy
Open-access, online, rapid taxonomy
This is a page from an unpublished manuscript
Please do not distribute it without express permission of the lead author
Type specimen
Male holotype, Barrow Island, Gas Treatment Plant/QCC, 20°47'42.95''S, 115°26'24.25''E, 5 January 2021, T. Sachse, UV light trap (WAM T160691).
Figure 1. Austrammo barbaramarksae sp. nov., holotype male (WAM T160691). A, dorsal habitus; B, ventral habitus; C, left pedipalp, ventral view; D, left pedipalp, retrolateral view. Scale bars: A, B, 1 mm; C, D, 0.2 mm.
Figure 2. Austrammo barbaramarksae sp. nov., female (HBI N25572-1). A, dorsal habitus; B, ventral habitus; C, epigyne, ventral view. Scale bars: 0.2 mm.
Figure 3. Distribution records of Austrammo and Barrowammo on Barrow Island. Austrammo barbaramarksae sp. nov. and B. waldockae are endemic to the island. Austrammo harveyi is widespread in Western Australia and into South Australia.
Diagnosis
Both males and females of A. barbaramarksae sp. nov. are most similar to those of A. rossi. The male pedipalp differs from that of A. rossi in a number of key sclerites; for example, the subtegulum is longer in A. rossi and the spermophor visible through the tegulum is bent tighter in A. rossi but at the same time reaches less far basally than that of A. barbaramarksae sp. nov., and the embolus tip is much broader in the new species. The epigyne of females differs particularly in the shape of the anterior hood, which is U-shaped in A. rossi and in that species, its edges connect to the anterior parts of the epigyne. In contrast, the hood of A. barbaramarksae sp. nov. forms an obtuse angle and its edges do not connect to the anterior edges of the epigyne.
Description
Male (based on holotype, WAM T160691). Total length 3.2. Carapace brown, centrally somewhat lighter; indistinct dark streaky pattern and darker edges (Fig. 1A). Chelicerae dark brown. Legs brown, except femora which are olive grey with brown bands (Fig. 1A, B). Labium and maxillae brown (Fig. 1B). Sternum light brown (Fig. 1B). Abdomen dorsally olive grey, posteriorly lighter (Fig. 1A); venter light brown (Fig. 1B). Pedipalp retrolateral tibial apophysis apically waved with dorsal tip (Fig. 1D), cymbium tip with 8 macrosetae; subtegulum reaching past half the cymbium opening, embolus very broad (Fig. 1C).
Female (based on HBI N25572-1): Total length 3.9. Carapace brown with dark grey streaky pattern (Fig. 2A). Chelicerae dark brown. Legs femora, patellae and tibiae dark olive grey; metatarsi and tarsi brown (Figs 2A, B). Labium brown; maxillae light brown (Fig. 2B). Sternum light brown (Fig. 2B). Abdomen dorsally dark metallic grey (Fig. 2A); venter brown (Fig. 2B). Epigyne slightly longer than wide; anterior hood separated; large openings anteriorly with white rims (Fig. 2C).
Variation. The second male measured 3.4 total length; females total length 3.7 – 4.0 (n = 3).
Remarks. The median ocular quadrangle in Austrammo barbaramarksae sp. nov. is about as wide as long and as wide at the front as at the back and therefore varies from the pattern in the generic description of Austrammo by Platnick (2002, p. 12): 'wider than long, wider back than in front'.
Other material examined
AUSTRALIA: Western Australia: Barrow Island: 1 male, Butler Park, Cluster 3, room 3-0-65, 20°49'09.57''S, 115°26'23.99''E, 19 April 2015, A. Williams (DPIRD 14471); 1 female, 20°45'17.632"S, 115°22'05.315"E, T. Sachse, spotlighting, 5 January 2020 (WAM T160692); 1 female, 20°49'57.02''S, 115°25'35.25''E, F. Bokhari, spotlighting, 15 November 2020 (WAM T160693); 1 female, Butler Park, 20°49'07.45''S, 115°26'26.37''E, T. Sachse, UV light trap, 10 February 2021 (HBI N25572-1).
Figure 1. Austrammo barbaramarksae sp. nov., holotype male (WAM T160691). A, dorsal habitus; B, ventral habitus; C, left pedipalp, ventral view; D, left pedipalp, retrolateral view. Scale bars: A, B, 1 mm; C, D, 0.2 mm.
Figure 2. Austrammo barbaramarksae sp. nov., female (HBI N25572-1). A, dorsal habitus; B, ventral habitus; C, epigyne, ventral view. Scale bars: 0.2 mm.
Figure 3. Distribution records of Austrammo and Barrowammo on Barrow Island. Austrammo barbaramarksae sp. nov. and B. waldockae are endemic to the island. Austrammo harveyi is widespread in Western Australia and into South Australia.
Etymology
This specific epithet is a matronym in honour of Barbara Marks, Senior HSE Specialist – Quarantine, Chevron Australia, on the occasion of her pending retirement.
Distribution
Austrammo barbaramarksae sp. nov. has so far only been found on Barrow Island, Western Australia (Fig. 3).