Tricholathys Chamberlin & Ivie, 1935 (毛隐蛛属)
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publication ID |
https://dx.doi.org/10.3897/zookeys.1185.107005 |
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publication LSID |
lsid:zoobank.org:pub:568A472D-950D-4338-A7DF-56C6EE473761 |
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persistent identifier |
https://treatment.plazi.org/id/C620195A-6775-5476-A2BD-147A132C8851 |
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treatment provided by |
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scientific name |
Tricholathys Chamberlin & Ivie, 1935 (毛隐蛛属) |
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Genus Tricholathys Chamberlin & Ivie, 1935 (毛隐蛛属) View in CoL View at ENA
Type species.
Tricholathys spiralis Chamberlin & Ivie, 1935 from Canada and USA.
Diagnosis.
Tricholathys is most similar to Arctella Holm, 1945 in having coiled posterior arm of conductor, but differs from the latter by the wide, twisted, ribbon-like terminal part of the conductor, the tapering, spiraled tip of the conductor, the sclerotized and subcircular coils (except T. serrata ) of copulatory ducts ( Marusik et al. 2017).
Description.
Habitus (Figs 1A, B View Figure 1 , 3A, B View Figure 3 , 5A, B View Figure 5 , 7A View Figure 7 , 9A, B View Figure 9 , 11A, B View Figure 11 , 13A, B View Figure 13 , 15A, B View Figure 15 ). Medium-sized spiders (3.0-8.0). Carapace brown to dark brown. Fovea longitudinal. Cervical groove and radial furrows distinct. Chelicerae elongate, brown, with 3-5 promarginal and 2 or 3 retromarginal teeth. Labium and endites brown, longer than wide. Sternum brown and scutellate, with sparse, brown setae. Legs brown. Leg formula 4123 or 1423. Abdomen oval, yellow-brown to dark brown, with lanceolate cardiac mark in anterior half, and with black V-shaped markings in posterior half part. Venter of abdomen yellow-brown, with small and undivided cribellum (female) (Figs 5D View Figure 5 , 11C View Figure 11 ) or somewhat reduced cribellum (male) (Fig. 11D View Figure 11 ).
Male palp (Figs 2A, B View Figure 2 , 3C-E View Figure 3 , 4A, B View Figure 4 , 5C, E-G View Figure 5 , 8A, B View Figure 8 , 9C-E View Figure 9 , 10A, B View Figure 10 , 11E-G View Figure 11 , 12A, B View Figure 12 , 13C-E View Figure 13 , 14A, B View Figure 14 , 15C-E View Figure 15 ) with broad, retrolateral tibial apophysis. Cymbium slightly longer than wide; bulb as long as wide. Conductor with 2 well-developed arms: anterior arm tapering gradually and extend towards base of embolus; posterior arm terminating in spiral and with digitiform process (DP in Figs 14B View Figure 14 , 15E View Figure 15 ; mostly covered by retrolateral tibial apophysis). Embolus long and extended clockwise, distal part thread-like and hidden by conductor.
Epigyne (Figs 2C, D View Figure 2 , 3F, G View Figure 3 , 4C, D View Figure 4 , 5H, I View Figure 5 , 6A, B View Figure 6 , 7B, C View Figure 7 , 8C, D View Figure 8 , 9F, G View Figure 9 , 10C, D View Figure 10 , 11H, I View Figure 11 , 12C, D View Figure 12 , 13F, G View Figure 13 , 14C, D View Figure 14 , 15F, G View Figure 15 ). Copulatory openings cochleate. Copulatory ducts with 2 distinct parts: weakly sclerotized part connected to copulatory openings and a strongly sclerotized part forming almost an entire circle (except T. serrata sp. nov.). Spermathecae nearly globular and small, less than the distance between spermathecae. Fertilization ducts small, hook-shaped.
Composition.
Eighteen species ( WSC 2023 and the data first presented herein).
Distribution.
The genus has a distinctive range and is known from the Nearctic, eastern part of Central Asia (Kyrgyzstan and Tajikistan), western and northern part of China, and the Northern Caucasus.
Habitats.
Judging from our collection, species of Tricholathys prefer to live in high-elevation habitats near rivers or at the snow line, building small mesh-webs under stones.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.