Ariadna Audouin, 1826

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 : 154-155

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.6335869
persistent identifier	https://treatment.plazi.org/id/784D6052-FFDB-FF8A-AFB5-FC20FA18FBA7
treatment provided by	Plazi
scientific name	Ariadna Audouin, 1826
status

Treatment

Genus Ariadna Audouin, 1826 View in CoL View at ENA

Pylarus Hentz, 1842 View in CoL (synonymised by Beatty 1970)

Macedonia Hogg, 1900 (synonymised by Rainbow 1920)

Segestriella Purcell, 1904 (synonymised by Beatty 1970)

Diagnosis. Ariadna differs from Gippsicola by the labium being narrowed distally ( Figs 6b View FIGURE 6 , 8b View FIGURE 8 cf. fig. 1c Giroti & Brescovit 2017), by the labrum lacking dorsal median setae and being longer than the labium ( Fig. 13b View FIGURE 13 cf. 5b Giroti & Brescovit 2017); by the presence of a basal transverse ridge on the chelicerae ( Figs 8d View FIGURE 8 , 13d View FIGURE 13 , cf. fig. 5a Giroti & Brescvoit 2017); by the posterior eyes being slightly recurved or straight ( Figs 1d View FIGURE 1 , 3d View FIGURE 3 , 6d View FIGURE 6 cf. fig 1a Giroti & Brescvoit 2017), by the presence of tubular invaginations on the posterior receptaculum (fig. 11d Giroti & Brescovit 2018 cf. fig. 7d Giroti & Brescvoit 2017) and by the tarsus of the female palp having five or more macrosetae ( Fig. 39d View FIGURE 39 ).

Key to the Ariadna of Tasmania

Males

(Males unknown for Ariadna alta View in CoL sp. nov.)

1 Abdomen with clear, well defined dark transverse markings on a pale cream background ( Figs 1a View FIGURE 1 , 8a View FIGURE 8 , 19a View FIGURE 19 , 21a View FIGURE 21 , 26a View FIGURE 26 , 33a View FIGURE 33 , 37a View FIGURE 37 ) ................................................................................................... 2

- Abdomen dark, with indistinct pale transverse lines, posteriorly ( Figs 12a View FIGURE 12 , 15a View FIGURE 15 , 23a View FIGURE 23 )................................ 8

- Abdomen with no transverse markings, but with a mottled light grey and dark grey colouration; species with a rounded oblong pedipalp bulb ( Figs 31a View FIGURE 31 , 32a View FIGURE 32 )..................................................... Ariadna subnubilum sp. now.

2 Metatarsus of leg I with a row of three shortened, blunt prolateral macrosetae apically ( Fig. 1f, g View FIGURE 1 )................................................................................................... Ariadna abbreviata View in CoL sp. nov.

- Macrosetae on metatarsus I of equivalent length to other macrosetae............................................ 3

3 Embolus arising medially from the pedipalp bulb and hooked at around the midpoint to ¾ of the embolus length ( Figs 22a View FIGURE 22 , 27a View FIGURE 27 )............................................................................................... 4

- Embolus arising from the edge of the pedipalp bulb and hooked apically ( Figs 2a View FIGURE 2 , 9a View FIGURE 9 , 20a View FIGURE 20 )........................... 5

4 Embolus short, thickened and hooked at around its midpoint ( Fig. 27a View FIGURE 27 )................. Ariadna segmentata Simon, 1893 View in CoL

- Embolus elongate and hooked at around ¾ its length ( Fig. 23a View FIGURE 23 )............................... Ariadna gonzo View in CoL sp. nov.

5 Pedipalp bulb squared, or rounded oblong in lateral view ( Figs 9a View FIGURE 9 , 34a View FIGURE 34 ).......................................... 6

- Pedipalp bulb pyramidal in lateral view ( Figs 2a View FIGURE 2 , 20a View FIGURE 20 )........................................................ 7

6 Pedipalp bulb rounded square and on lateral view is distinctly bulbous dorsally. Embolus long, slender and smoothly curved along its length, to a rounded apical hook ( Fig. 9a View FIGURE 9 )....................................... Ariadna amabilia View in CoL sp. nov.

- Pedipalp bulb rounded oblong. Embolus elongate, curved, with a short sinuous section just posterior to a distinct apical hook ( Fig. 35a View FIGURE 35 )..................................................................... Ariadna thylacinus View in CoL sp. nov.

7 Macrosetae of tibia and metatarsus I paired ( Fig. 19f, g, h View FIGURE 19 ).................................. Ariadna fragilis View in CoL sp. nov.

- Macrosetae of tibia and metatarsus I non-sequential ( Fig. 37f, g, h View FIGURE 37 )........................... Ariadna tigrina View in CoL sp. nov.

8 Retrolateral preening comb on leg IV with 7 or 8 macrosetae ( Figs 15e View FIGURE 15 , 23e View FIGURE 23 )...................................... 9

- Retrolateral preening comb on leg IV with 5 macrosetae ( Fig. 13e View FIGURE 13 )......................... Ariadna crypticola View in CoL sp. nov.

9 Embolus strongly curved, with well-defined apical hook ( Fig. 16a, b View FIGURE 16 )...................... Ariadna ferrogrisea View in CoL sp. nov.

- Embolus weakly curved, with only slight apical hook ( Fig. 25a, b View FIGURE 25 ).................... Ariadna muscosa Hickman, 1929 View in CoL

Females

(Females unknown for A. crypticola View in CoL sp. nov., A. fragilis View in CoL sp. nov., A. gonzo View in CoL sp. nov., A. subnubilum sp. nov.; species delineation of females, in most cases, requires examination of internal genitalia, this was not possible for A. major View in CoL , A. muscosa View in CoL or A. thylacinus View in CoL sp. nov., so these species have not been included in this key).

1. With a distinct row of dual prolateral macrosetae on tibia I and 12 pairs of macrosetae on tarsi I ( Fig. 6f, g View FIGURE 6 )..................................................................................................... A. alta View in CoL sp. nov.

- not with the above combination, with row of prolateral macrosetae on tibia I not distinctly dual and with fewer than 12 paired macrosetae on tarsi I ( Figs 3g View FIGURE 3 , 10g View FIGURE 10 , 17g View FIGURE 17 , 28g View FIGURE 28 , 36g View FIGURE 36 , 39g View FIGURE 39 )...................................................... 2

2. In lateral view, anterior receptaculum with 3 or 4 apical finger-like projections ( Fig. 11b View FIGURE 11 )............ A. amabilia View in CoL sp. nov.

- Anterior receptaculum not as above, with lateral projections (e.g. Fig. 4b View FIGURE 4 ), or with apical projections that are other than 3 or 4 and finger-like (e.g. Figs 29a View FIGURE 29 , 40a View FIGURE 40 )........................................................................ 3

3. In ventral view, anterior receptaculum elongate, with distinct hook at apex ( Fig. 29a View FIGURE 29 )...... Ariadna segmentata Simon, 1893 View in CoL

- Anterior receptaculum without distinct hook at apex (e.g. Figs 11a View FIGURE 11 , 7a View FIGURE 7 ).......................................... 4

4. In ventral view anterior receptaculum strongly sinuous ( Fig. 40a View FIGURE 40 )................................. A. tigrina View in CoL sp. nov.

- Anterior receptaculum may be curved, or hooked in ventral view, but not strongly sinuous (e.g. Figs 11a View FIGURE 11 , 18a View FIGURE 18 , 29a View FIGURE 29 )....... 5

5. Abdomen with distinct transverse markings ( Fig. 3a View FIGURE 3 )................................... Ariadna abbreviata View in CoL sp. nov.

- Abdomen dark, with indistinct pale transverse lines, posteriorly ( Fig. 17a View FIGURE 17 ).................. Ariadna ferrogrisea View in CoL sp. nov.