Geostiba (Sibiota) kalavanica, Assing, 2017
publication ID |
https://doi.org/ 10.5281/zenodo.5409928 |
persistent identifier |
https://treatment.plazi.org/id/03AA87A4-FFD7-4860-FF62-0AEAFDCAFB29 |
treatment provided by |
Marcus |
scientific name |
Geostiba (Sibiota) kalavanica |
status |
sp. nov. |
Geostiba (Sibiota) kalavanica View in CoL nov.sp. ( Figs 39-49 View Figs 39-49 , Map 4 View Map 4 )
T y p e m a t e r i a l: Holotype 3: " ARMENIA [13] – WSW Dilijan, Kalavan, 40°38'40''N, 45°06'04''E, 1700 m, oak forest, 29.VI.2017, V. Assing / Holotypus 3 Geostiba kalavanica sp. n. det. V. Assing 2017 " (cAss). Paratypes: 433, 8 ♀♀: same data as holotype (cAss).
E t y m o l o g y: The specific epithet is derived from the name of the mountain where this species was discovered.
D e s c r i p t i o n: Body length 1.9-2.4 mm; length of forebody 0.85-1.00 mm. Coloration: body dark-yellowish to pale-reddish. Eyes small, with pigmentation, and composed of approximately five ommatidia. Pronotum with a shallow longitudinal impression on either side of midline. Hind wings completely reduced.
3: elytra ( Fig. 39 View Figs 39-49 ) with pronounced, narrow, anteriorly slightly broader and posteriorly sharply edged carina extending along whole suture, disc with usually extensive and more or less pronounced impression; abdominal tergite VII ( Fig. 40 View Figs 39-49 ) with a pair of moderately pronounced carinae posteriorly; posterior margins of tergite and sternite VIII broadly and weakly convex; median lobe of aedeagus ( Figs 41-44 View Figs 39-49 ) 0.24 mm long, without distinct semi-transparent spines in internal sac; ventral process weakly curved in lateral view; paramere not distinctive.
♀: elytra and abdominal tergite VII without modifications; tergite VIII ( Fig. 45 View Figs 39-49 ) shaped as in male; posterior margin of sternite VIII ( Fig. 46 View Figs 39-49 ) convex, in the middle usually very shallowly concave; spermathecal capsule ( Figs 47-49 View Figs 39-49 ) with strongly dilated distal portion and short proximal portion.
I n t r a s p e c i f i c v a r i a t i o n: As in G. tigrani , the male secondary sexual characters may be reduced to various degrees in smaller males.
C o m p a r a t i v e n o t e s: In external characters (coloration, body size, eye size, etc.), including the male secondary sexual characters, G. kalavanica is highly similar to G. pambakica . It is distinguished from this species above all by the strongly dilated distal portion of the spermatheca. Regarding the shape of the spermatheca, G. kalavanica is most similar to G. unituber , from which it differs by the different modifications of the male tergite VII, a slightly different shape of the median lobe of the aedeagus (lateral view), and a slightly shorter proximal portion of the spermatheca.
D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: The type locality is situated near Kalavan village in Kalavan mountain, to the north of the northwestern tip of Sevan lake ( Map 4 View Map 4 ). The specimens were sifted from litter and roots on a calcareous south slope with oak forest at an altitude of 1700 m. The head of one of the males from the type locality is infested with Laboulbeniales.
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