Ariadna crypticola, Marsh & Stevens & Framenau, 2022

Marsh, Jessica R., Stevens, Mark I. & Framenau, Volker W., 2022, A taxonomic revision of the tube-web spiders of the genus Ariadna (Araneae: Segestriidae) in Tasmania, Zootaxa 5105 (2), pp. 151-201 : 167-170

publication ID	https://doi.org/ 10.11646/zootaxa.5105.2.1
publication LSID	lsid:zoobank.org:pub:4F6F5BC6-2AAF-4B23-882E-F77C63BE4CC2
DOI	https://doi.org/10.5281/zenodo.6333417
persistent identifier	https://treatment.plazi.org/id/86B58502-FEFF-4622-B0A0-D41E511CABE6
taxon LSID	lsid:zoobank.org:act:86B58502-FEFF-4622-B0A0-D41E511CABE6
treatment provided by	Plazi
scientific name	Ariadna crypticola
status	sp. nov.

Treatment

Ariadna crypticola View in CoL sp. nov.

Figs 13a–h View FIGURE 13 , 14a–c View FIGURE 14 , 12 View FIGURE 12

http://zoobank.org/NomenclaturalActs/86b58502-feff-4622-b0a0-d41e511cabe6

Type material. Holotype ♂. AUSTRALIA: Tasmania: Bruny Island, Mt Mangana Nature Trail , 43.37°S, 147.28°E, 18 June 1974, coll. R. Mawbey & D. Coleman, in moss ( AM KS.111585). GoogleMaps

Other material examined. Known only from the type specimen.

Etymology. The specific epithet is taken form the Latin adjective, meaning ‘cryptic’ and refers to superficial morphological similarities of this species to other species of Tasmanian Segestriidae .

Diagnosis. Males of A. crypticola sp. nov. are most similar to A. ferrogrisea sp. nov., A. muscosa and A. subnubilum sp. nov.. It can be distinguished from A. ferrogrisea sp. nov. by its longer and more curved embolus and elongated bulb ( Fig. 14a, b View FIGURE 14 cf. Fig. 16a, b View FIGURE 16 ) and by the pattern of, and greater number of macrosetae on tibia and metatarsus of leg I of A. ferrogrisea sp. nov. ( Fig. 13f–h View FIGURE 13 cf. Fig. 15f–h View FIGURE 15 ). The species can be differentiated from A. muscosa by the more pronounced prolateral projection on the cymbium, by the pedipalp tibia, which is broader and shorter in A. crypticola sp. nov. than A. muscosa and by the embolus, which has a more defined apical hook in A. crypticola sp. nov. ( Fig. 14a–c View FIGURE 14 cf. Fig. 25a–c View FIGURE 25 ). It can be separated from A. subnubilum sp. nov. by the squarer pedipalp cymbium, with a less well defined prolateral extension of A. subnubilum sp. nov. ( Fig. 14c View FIGURE 14 cf. Fig. 32c View FIGURE 32 ), by the lack of a transverse abdominal pattern in A. subnubilum sp. nov. ( Fig. 13a View FIGURE 13 cf. Fig. 31a View FIGURE 31 ). The species can also be distinguished by the number of macrosetae in the preening comb of leg IV, being composed of five macrosetae in A. crypticola sp. nov., eight in A. ferrogrisea sp. nov., seven in A. muscosa and seven in A. subnubilum sp. nov. ( Fig. 13e View FIGURE 13 cf. Figs 15e View FIGURE 15 , 24e View FIGURE 24 , 31e View FIGURE 31 ).

Description. ♂ (based on holotype; AM KS.111585). Total length 4.3.

Colour in ethanol: Carapace red brown, with irregular faint pallid patches laterally and anteriorly, with sparse brown setae; edges dark brown. Sternum orange-brown, with regular darker inter coxae patches; with scattered sparse, long dark setae. Labium, maxillae and chelicerae darker red brown. Abdomen dorsally dark grey, with faint, narrow white striations posteriorly; ventrally dark grey medially, paler laterally. Legs golden brown, with sparse dark setae ( Fig. 13a–h View FIGURE 13 ).

Cephalothorax: 2.16 long, 1.5 wide, 1.1 high. Carapace oval, with a broad neck anteriorly, edges gently undulating, fovea a shallow indentation ( Fig. 13a View FIGURE 13 ), from lateral view carapace gently domed, highest just posterior to eye group ( Fig. 13c View FIGURE 13 ). Labium narrowed anteriorly, about ¾ length of maxillae; chelicerae with basal transverse ridge, retromargin with single tooth, promargin with three teeth; sternum rounded oval, convex, with precoxal triangles and with smaller, broadly triangular intercoxal extensions ( Fig. 13b View FIGURE 13 ). Posterior eye row recurved, eyes large, eye group occupying 0.6 of carapace width ( Fig. 13d View FIGURE 13 ).

Abdomen: 2.1 long; covering of short and long setae, longer posteriorly ( Fig. 13a View FIGURE 13 ).

Legs: Leg length ratio: I>II>IV>III. Leg I femur 1.4, patella 0.6, tibia 1.3, metatarsus 0.9, tarsus 0.5; Leg II femur 1.5, patella 0.4, tibia 0.9, metatarsus 1.2, tarsus 0.6; Leg III femur 1.2, patella 0.6, tibia 0.9, metatarsus 0.6, tarsus 0.4; Leg IV femur 1.4, patella 0.5, tibia 0.8, metatarsus 1.0, tarsus 0.5. Femur I bowed in dorsal view. Leg I femur d1-1-1-1, dp1ap; tibia p1-1-1, pv1-1-1-1-1ap, rv1-1-1-1-1ap, r1-1-1; metatarsus pv1-1-1ap, rv1-1-1ap. Leg II femur d1-1-1, dp1/0ap; tibia p1-1-2, pv1-1ap, rv1-1-1-1ap, r1-1-1; metatarsus p1-1, pv1-1-1-1ap(broken), rv1-1-1- 1ap, r1. Leg IV femur d1-1-1; tibia rv1-1; metatarsus 1-1-1ap. Retrolateral distal preening comb with 5 macrosetae ( Fig. 13e View FIGURE 13 ). STC I, II with 6 teeth, ITC with small tooth. Tarsi with sparse distal ventral scopulose setae.

Pedipalp: Tibia short, just greater than length of the cymbium; cymbium rounded square shape, with strongly triangular anterior prolateral extension, scopulose setae anteriorly. Bulb elongate globular in lateral view, embolus long, thin and strongly hooked apically ( Fig. 14a–c View FIGURE 14 ).

Variation. Known only from the type specimen.

Distribution. Known only from one specimen from Bruny Island, a small island located off the south-eastern coast of Tasmania ( Fig. 12 View FIGURE 12 ).