Dysdera nakhchivanica, E, 2018

E, Middle, 2018, A new Dysdera species (Araneae: Dysderidae) from Azerbaijan, Linzer biologische Beiträge 50 (2), pp. 1111-1118 : 1112-1113

Dysdera nakhchivanica nov.sp. ( Figs. 1-4 , 7-8 )

M a t e r i a l e x a m i n e d: Holotype ♂ ( ANAS), Azerbaijan, Nakhchivan AR, Kengerli Distr., Chalkhangala , under the stones, 39°27'9.23"N 45°15'54.3"E, 2.V.2012 (E. GUSEİNOV).

D i a g n o s i s: The general characters of Dysdera as dark-brown cephalotorax and chelicerae, brown sternum, light brown legs, grey abdomen combine nakhchivanica nov.sp. with some species. The new species differs from other congeners in size: the cephalotorax length (3,65x2,95 in D. borealicaucasia, 3,70x3,15 in D. gmelini , 4,35x3,40 in D. daghestanica , 3,30x2,50 in D. enguriensis and 2,90x2,15 in D. richteri ). All species also differ by eye pattern und leg supination and measurement ( DUNİN 1991a).

Dysdera nakhchivanica nov.sp. male reproductive organ is clearly distinguished from other type of structures and can be identified. Male palp structures of Dysdera nakhchivanica nov.sp. is similar to Dysdera enguriensis DEELEMAN- REHNHOLD, 1988 from asiatica group, from richteri group Dysdera richteri CHARİTONOV, 1956 and Dysdera gmelini DUNİN, 1991 ; from crocata group Dysdera borealicaucasica DUNİN, 1991 and Dysdera daghestanica DUNİN, 1991 . But the male nakhchivanica differ well from all comporative congeners by the shape of size and structur of tegular, posterior apophysis and by the proportions of the bulb and shape of the lateral part of the bulb ( Figs. 1, 3 ). So the bulbus of D. borealicaucasus with the curved medial apophysis; medial apophysis of D.daghestanica is curved with two teeth and posterior apophysis is smooth; D. enguriensis and D. raddei have curved medial apophysis with small denticle, apophysis is almost smooth. In compared to another species it is clearly visible that D. nakhchivanica nov.sp. has almost identical structur by palp of D. richteri . Both species have similar bulb proportions (tegular and embolic parts equal in length), a triangular posterior apophysis and small process (Sp) anteriorly ( Fig. 1 ). D. richteri was found by Dunin in Nakhchivan, Shahbuz distr. in 1986 (DUNİN 1992). Judge by general characteristic and structure of the male nakhchivanica nov.sp. and geographical factor of both species give us grounds to say that the new species is rather similar to D. richteri (after Dunin’s describtion). This species that was descriebed by Dunin is not similar to the D. richteri described after CHARİTONOV, 1956 and DEELEMAN- REHNHOLD 1988. It means that Dunin’s species is an another species, probably a new species.

E t y m o l o g y: The name refers to the type locality of the new species.

M e a s u r e m e n t s (♂): Total length 13.4. Carapace 6.0 long, 5.0 wide ( Figs. 7- 8 ).

Prosoma. Carapace, maxillae, labium and sternum dark-brown. Cephalic region 1.78 wide. Clypeus 0.12 long. Sternum 4.2 long, 2.8 wide and wrinkled. Chelicerae 3.5 long, 0.15 wide with 3 teeth in one row. Fang of chelicerae is 1,98 long. Labium 0.17 long, 0.08 wide ( Figs. 7-9 ).

Eyes. Diameter of AME 0.16, PME 0.13, PLE 0.15. Distances between AME–AME 0.15, PME–PME 0.01, PME–PLE 0.04. Distance between anterior median eyes almost equal to AME diameter.

Abdomen. Abdomen 7.4 long, 3.8 wide. Abdomen whitish grey. Book lungs, opercula and margins of spiracles brown and sclerotized ( Figs. 7-8 ).

Legs. Legs orange, light brown. Measurements and spination as in Tables 1–2. Legs formula as 1:2:4:3.

Palp. Palp as in Figures 1-4 . Femur 3.6, patella 0.18, tibia 0.5, cymbium 0.17 and bulb 3.4 long. Tegulum yellow. Sperm duct is a little darker and clear. Posterior apophysis (Pa) beak-shaped in lateral view-has slightly above the tip and is lightly sclerotized. More prominent sign for this species is a structure of medial apophisis that consist of four teeth and small denticle. This sign brings our species closer to another grouprichteri.

D i s t r i b u t i o n: The species has been detected up to this point only in Nakhchivan Autonomous Republic, Kengerli distr, Chalkhangala, Azerbaijan ( Fig. 10).

Figures

Figs. 1-4: Male palp of Dysdera nakhchivanica nov.sp.: (1, 3)retrolateral (2, 4) prolateral view. Figs. 5-6: Male palp of Dysdera richteri (after Dunin): (5) retrolateral (6) prolateral.

Fig. 7-9: Male habitus (7) dorsal, (8) ventral and (9) lateral view of chelicerae of D. nakhchivanica nov.sp.