Raveniola diluta, Zonstein, 2024

Zonstein, Sergei L., 2024, A revision of the spider genus Raveniola (Araneae, Nemesiidae). II. Species from Central Asia, European Journal of Taxonomy 967, pp. 1-185 : 49

publication ID	https://doi.org/ 10.5852/ejt.2024.967.2699
publication LSID	lsid:zoobank.org:pub:C08B8027-50CC-417E-BCD4-5183B9FF6738
persistent identifier	https://treatment.plazi.org/id/03A8B723-551A-FF8A-FD8D-E622FAC4C9B3
treatment provided by	Plazi
scientific name	Raveniola diluta
status

Treatment

Raveniola diluta species group

Diagnostic characters

Maxillae with a few cuspules confined to probasal maxillary edge ( Figs 216–219 View Figs 211–219 , 243–246 View Figs 238–246 ). PMS absent; apical segment of PLS triangular or shortly digitiform ( Figs 589–596 View Figs 584–592 View Figs 593–601 ). Males: tibiae and metatarsi I–II without modified hairs ( Figs 273–277 View Figs 265–273 View Figs 274–281 , 303 View Figs 290–309 ); cymbium moderately short (as in Figs 365–369 View Figs 364–378 ); embolus bent and screwed subapically, with or without subapical keel ( Figs 429–438 View Figs 429–438 ). Females: each paired spermatheca Ⱶ-shaped, mostly low and moderately wide, with wide base and inner branch incorporated into the entire cone-shaped trunk, and with short and club-like or fusiform lateral diverticulum ( Figs 526– 533 View Figs 522–536 ).

Species included

Raveniola diluta sp. nov., R. fedotovi ( Charitonov, 1946) View in CoL , R. pallens sp. nov. and R. zyuzini sp. nov.

Key to the species of the diluta group

Males 1. Embolus with well-defined and raised triangular keel ( Figs 429–433 View Figs 429–438 )............................................. 2 – Embolic keel rudimentary or absent ( Figs 434–438 View Figs 429–438 ) ........................................................................ 3

2. Copulatory bulb elongate; proximal part of embolus much longer than its apical part; pointed triangular keel less acute and forms an angle> 60° ( Figs 429–431 View Figs 429–438 )........................ R. diluta sp. nov.

– Copulatory bulb short; proximal and apical parts of embolus subequal in length; short and acute triangular keel forms an angle <45° ( Figs 432–433 View Figs 429–438 )......................... R. fedotovi ( Charitonov, 1946) View in CoL

3. Metatarsus I weakly curved ( Fig. 276 View Figs 274–281 ); scopula on tarsi and metatarsi I–II sparser. Copulatory bulb shorter; proximal part of embolus more tapering ( Figs 434–435 View Figs 429–438 ).......................... R. pallens sp. nov.

– Metatarsus I strongly curved ( Fig. 277 View Figs 274–281 ); scopula on tarsi and metatarsi I–II denser. Copulatory bulb longer; proximal part of embolus less tapering ( Figs 436–438 View Figs 429–438 )............................. R. zyuzini sp. nov.

Females

1. Carapace, palps and legs intensely brownish orange ( Figs 18 View Figs 10–18 , 53 View Figs 45–53 , 73–74 View Figs 69–75 ). Spermathecal trunks and fundus of lateral diverticulum weakly sclerotized ( Figs 532–533 View Figs 522–536 ) ........................ R. zyuzini sp. nov.

– Carapace, palps and legs pale brownish yellow or pale brownish orange ( Figs 50–52 View Figs 45–53 ). Spermathecae differ in their structure ( Figs 526–531 View Figs 522–536 ).............................................................................................. 2

2. Interdistance AME–AME slightly wider than diameter of AME ( Figs 182–183 View Figs 172–183 ). Palpal tarsus with entire scopula. Cone-shaped spermathecal trunk clearly longer than wide ( Figs 526–529 View Figs 522–536 ) ............. 3

– Interdistance AME–AME considerably wider than diameter of AME ( Fig. 184 View Figs 184–195 ). Palpal tarsus with widely divided scopula. Dome-shaped spermathecal trunk about as wide as long ( Figs 530– 531 View Figs 522–536 )......................................................................................................................... R. pallens sp. nov.

3. Patellae I–II with spines. Scopula on tarsi II and III narrowly and widely divided, respectively. Spermathecal trunk shorter and more tapering toward apex ( Figs 526–527 View Figs 522–536 )........... R. diluta sp. nov.

– Patellae I–II aspinose.Scopula on tarsi II and III widely divided and absent, respectively.Spermathecal trunk longer and less tapering toward apex ( Figs 528–529 View Figs 522–536 ) ............... R. fedotovi ( Charitonov, 1946) View in CoL