Ariadna gonzo, 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 : 177-179

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.6333421
persistent identifier	https://treatment.plazi.org/id/345338B5-EEB0-453A-8777-29AC4C70AF14
taxon LSID	lsid:zoobank.org:act:345338B5-EEB0-453A-8777-29AC4C70AF14
treatment provided by	Plazi
scientific name	Ariadna gonzo
status	sp. nov.

Treatment

Ariadna gonzo View in CoL sp. nov.

Figs 22a–h View FIGURE 22 , 23a–c View FIGURE 23 , 19 View FIGURE 19

http://zoobank.org/NomenclaturalActs/345338b5-eeb0-453a-8777-29ac4c70af14

Type material. Holotype ♂. AUSTRALIA: Tasmania: Epping Forest, Sherwood Bush Block pitfall 3; 41.73°S, 147.30°E; 05 April 1991; coll. L. McGowan ( QVMAG QVM:2021:13:0640). GoogleMaps

Other material examined. Tasmania: 3 ♂, same data as holotype ( QVMAG QVM:13:42419) GoogleMaps .

Etymology. The specific epithet is in reference to the curved and hooked embolus of the pedipalp, which resembles the nose of the Muppet character Gonzo.

Diagnosis. Ariadna gonzo sp. nov. is closest to A. abbreviata sp. nov., A. clavata and A. muscosa , it can be differentiated from these species by the embolus arising medially from the bulb, and with the embolus being hooked at around ¾ of its length ( Fig. 23a–c View FIGURE 23 cf. Figs 2a–c View FIGURE 2 , 25a–c View FIGURE 25 ; fig. 1g, i Marsh et al. 2018).

Description. ♂ (based on holotype; QVMAG QVM:2021:13:0640). Total length 6.9.

Colour in ethanol: Carapace dark brown, darker anteriorly, with sparse, scattered dark setae, denser anteriorly; sternum mid brown, with black long brown setae, maxillae and labium mid brown, paler in colour apically, chelicerae dark red brown; abdomen dorsally light grey, with dark grey chevrons, ventrally light grey. Legs golden yellow brown, with dark setae ( Fig. 22a–h View FIGURE 22 ).

Cephalothorax: 3.5 long, 1.9 wide, 1.8 high. Carapace broadly oval, anteriorly with broad neck, fovea shallow ( Fig. 22a View FIGURE 22 ); in lateral view carapace domed, caput raised towards anterior, highest at midpoint between fovea and eyes ( Fig. 22c View FIGURE 22 ). Labium narrowed anteriorly, about ¾ length of maxillae; chelicerae hypognathous, with basal transverse ridge, retromargin with single tooth, promargin with three teeth; sternum oval, with precoxal triangles and with smaller, rounded intercoxal extensions ( Fig. 22b View FIGURE 22 ). Eye group 0.7 wide, 0.5 of anterior carapace width; posterior eye row slightly recurved, eye group on extensions projecting anteriorly over clypeus ( Fig. 22d View FIGURE 22 ).

Abdomen: 2.8 long. Covered in fine setae ( Fig 22a View FIGURE 22 ).

Legs: Leg length ratio II>I>IV. Leg I femur 2.9, patella 1.0, tibia 2.2, metatarsus 1.8, tarsus 1.0. Leg II femur 2.6, patella 1.0, tibia 2.4, metatarsus 2.3, tarsus 0.9. Leg IV femur 2.5, patella 1.1, tibia 2.1, metatarsus 1.9, tarsus 0.9. Femur I bowed in dorsal view. Leg III damaged. Macrosetae: Leg I: Femur d1-1-1-1ap, dp2ap; tibia p1-1-1-1-1, pv1-1-1-1-1-1ap, rv1-1-1-1-1-1ap, r1-1-1-1-1; metatarsus p1-1-1, pv1-1-1-1-1-1ap, rv1-1-1-1-1ap, r1. Leg II femur d1, dp2ap; tibia p1-1-1, pv1-1-1ap, rv1-1-1-1-1-1ap, r1-1-1-1-1-1. Leg IV femur d1-1-1-1-1, dp1ap; tibia p1-1-1-1- 1, v1-1-1ap, rv1-1-1ap; metatarsus p1-1-1, pv1-1-1-1ap, v1-1ap, r1. Retrolateral distal preening comb with 7 spines (Fig, 22e). STC I, II with 11 long teeth, ITC with single tooth, Tarsi with distal ventral scopulose setae.

Pedipalp: Tibia short, bulbous and ventrally expanded, 0.7 width to height; cymbium rounded square, triangular apically with elongate setae; bulb globular, embolus originating medially from ventral edge of bulb, broad; curved and hooked apically ( Fig. 23a–c View FIGURE 23 ).

Variation. Material examined for this species was in poor condition and many macrosetae were damaged, however, there was little variation in the specimens examined.

Distribution. Known only from type locality ca. 35 km SSE of Launceston ( Fig. 19 View FIGURE 19 )