Fuchiba, Haddad & Lyle, 2008
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publication ID |
https://doi.org/ 10.5733/afin.049.0204 |
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DOI |
https://doi.org/10.5281/zenodo.7661485 |
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persistent identifier |
https://treatment.plazi.org/id/03A18799-6576-FFB2-FDA5-F372907CFD87 |
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treatment provided by |
Felipe |
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scientific name |
Fuchiba |
| status |
gen. nov. |
Genus Fuchiba View in CoL gen. n.
Etymology: The genus name is an arbitrary combination of letters. Gender masculine.
Type species: Fuchiba aquilonia View in CoL sp. n.
Diagnosis: Separated from other trachelines by the robust body, lack of any cusps or spines on legs, widely spaced eyes, high and finely granulate carapace with a shallow depression immediately anterior to the fovea, and by the genitalic structures: males have a short coiled embolus distally on the tegulum and a simple single RTA; females have copulatory openings situated laterally in sclerotised posterior circular depressions.
Description: Small spiders, 2.43–4.70 mm long; carapace yellow-brown, orange, redbrown or dark brown, abdomen pale grey with dark grey dorsal chevron marking ( Figs 1–3 View Figs 1–4 , 5–14 View Figs 5–14 ); carapace surface finely granulate ( Figs 15, 16 View Figs 15–23 ); AER procurved, clypeus height larger than AME diameter; AME slightly smaller than ALE, or eyes subequal; AME closer to ALE than to each other; PER strongly recurved ( Fig. 16 View Figs 15–23 ); PME slightly larger than PLE, or eyes subequal; PME closer to each other than to PLE; chilum single, triangular, tapering distally, sometimes with distal notch; cheliceral promargin and retromargin with three teeth each, retromarginal teeth often on single base, otherwise close together ( Fig. 17 View Figs 15–23 ); labium trapezoidal; endites straight laterally with distinct serrula ( Fig. 18 View Figs 15–23 ), anterolateral spur present in male F. montana sp. n. and F. venteri sp. n.; carapace broadly oval, widest at midpoint, eye region wide; carapace with slight depression anterior to fovea, posterior margin slightly concave; pleural bars isolated; sternum shield-shaped; precoxal triangles present; intercoxal sclerites present between coxae I and II, II and III, and III and IV; legs I and II more strongly built than legs III and IV; legs without spines or ventral cusps, metatarsi and tarsi scopulate ( Figs 19, 20 View Figs 15–23 ), with paired tarsal claws and weakly developed claw tufts ( Fig. 21 View Figs 15–23 ); metatarsi III and IV with terminal preening brush; leg formula 1423 in ♂, 4123 in ♀; abdomen oval, tapering posteriorly; dorsal scutum complete in ♂, absent in ♀; dorsal sigilla present; venter with paired tiny sclerites running from epigastric fold to spinnerets; inframamillary sclerite absent; male palp with single subtriangular RTA; tegulum oval, with short distal embolus forming single coil ( Figs 22, 23 View Figs 15–23 ); female epigyne with copulatory openings situated laterally in paired circular ridges; vulva with short entrance ducts, directed anteriorly; ST II large, oval, anteromedially situated, ST I small, laterally situated.
Species included: F. aquilonia , F. capensis , F. montana , F. similis , F. tortilis and F. venteri (all new).
Key to species of the genus Fuchiba View in CoL gen. n.
1 Males (♂ of F. similis View in CoL sp. n. and F. tortilis View in CoL sp. n. unknown) ................................. 2
– Females ................................................................................................................. 5
2 Embolus forming narrow coil with tip directed towards and ending close to cymbial tip ( Fig. 45 View Figs 45–48 ) ................................................................................... F. venteri View in CoL sp. n.
– Embolus forming broad coil in transverse plane, tip closer to distal end of tegulum than to cymbial tip ( Fig. 26 View Figs 24–31 ) ................................................................................. 3
3 Embolus forming complete coil through 360°, tip situated close to prolateral base and directed towards cymbial tip ( Fig. 36 View Figs 36–39 ) ................................ F. montana View in CoL sp. n.
– Embolus only curving 180° to 270° from prolateral base ( Figs 26 View Figs 24–31 , 32 View Figs 32–35 )............... 4
4 Embolus coiled through 180°, tip directed slightly towards cymbial tip ( Fig. 26 View Figs 24–31 ) .................................................................................................. F. aquilonia View in CoL sp. n.
– Embolus coiled through approx. 270°, tip slanting slightly towards base of tegulum ( Fig. 32 View Figs 32–35 ) ...................................................................................... F. capensis View in CoL sp. n.
5 Epigyne with distinctive paired posterior circular ridges ( Fig. 30 View Figs 24–31 ), entrance ducts not coiled ( Fig. 31 View Figs 24–31 ) ............................................................................................... 6
– Epigyne with subrectangular ridges with curved margins, entrance ducts distinctly coiled ( Figs 43, 44 View Figs 41–44 ) ........................................................................ F. tortilis View in CoL sp. n.
6 Epigyne with corrugated ridges anteriorly, ST II small and round ( Fig. 41 View Figs 41–44 ).......... ....................................................................................................... F. similis View in CoL sp. n.
– Epigyne without corrugated ridges anteriorly, ST II usually larger and oval ....... 7
7 Copulatory openings situated anterolaterally in circular ridges; ST II large, length from anterior margin to posterior bend much greater than length of circular ridges ( Fig. 38 View Figs 36–39 ) ..................................................................................... F. montana View in CoL sp. n.
– Copulatory openings situated mediolaterally or posteriorly in circular ridges; ST II smaller, length from anterior margin to posterior bend nearly equal to or smaller than length of circular ridges (e.g. Fig. 30 View Figs 24–31 ) .......................................................... 8
8 Base of ST II initially bending posteromedially following entrance ducts before bending anteriorly into oval receptacle; ST II orientated parallel to body axis ( Fig. 30 View Figs 24–31 ) ............................................................................................. F. aquilonia View in CoL sp. n.
– Base of ST II initially bending anteromedially following entrance ducts before bending anterolaterally into oval receptacle; ST II orientated obliquely relative to body axis ( Figs 34 View Figs 32–35 , 47 View Figs 45–48 ) ......................................................................................... 9
9 Copulatory openings broad ( Fig. 47 View Figs 45–48 ), lateral receptacles of ST I distinctly separated ( Fig. 48 View Figs 45–48 ); carapace yellow-brown ................................................. F. venteri View in CoL sp. n.
– Copulatory openings narrow ( Fig. 34 View Figs 32–35 ), lateral receptacles of ST I close together ( Fig. 35 View Figs 32–35 ); carapace yellow-brown to red-brown ......................... F. capensis View in CoL sp. n.
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