Deronectes kabilcevz, Aykut & Yildirim & Tusun & Fery, 2019

Aykut, Medený, Yildirim, Ýbrahým Halýl, Tusun, Sadreddýn & Fery, Hans, 2019, Deronectes kabilcevz sp. n. and D. propedoriae sp. n. from south-eastern Anatolia (Turkey) (Coleoptera, Dytiscidae, Hydroporinae), Zootaxa 4691 (5), pp. 589-600 : 591-592

Comparison of D. kabilcevz sp. n. with D. schuberti Wewalka, 1971

Deronectes kabilcevz sp. n. belongs to the D. longipes -subgroup of the D. parvicollis -group. The shape of its medi- an lobe is especially similar to that of D. schuberti (compare Figs 15 and 17 ). When Wewalka (1971: 138) described the latter species, he studied the holotype (male; locus typicus: Elbistan, ca. 80 km NNE Kahraman Maraş) and five paratypes from the same locality (exact locality data unknown; collected by F. Schubert). To our knowledge, records of this species were never again reported. We have studied one of the male paratypes (CHF; habitus in Fig. 2 ) and compared it with our new species. Both have a different body length, but this may be due to individual variation. In D. schuberti the metacoxal lines are more converging anteriad, whilst they are almost parallel in D. kabilcevz sp. n. (compare Figs 5 and 6 ). The notch at the apex of the last abdominal ventrite is much broader in D. schuberti (compare Figs 9 and 10 ). The shapes of the median lobe of aedeagus of both species (compare Figs 15 and 17 ) are similar at first glance. In fact, in ventral view differences are little evident: over all the median lobe of D. kabilcevz sp. n. appears to be somewhat more slender, but the distal third is very slightly broader in D. kabilcevz sp. n. than in D. schuberti . However, in lateral view the differences are much more obvious: (1) the distal two thirds as a whole are more inclined to the basal third in D. kabilcevz sp. n., although the inner outline near the base is wider curved than in D. schuberti ; (2) the distal third is less inclined to the medial third and the ventral outline (in Figs 15 and 17 at the right side of the lobes) is more evenly curved in D. kabilcevz sp. n.; (3) in both species the lobe is somewhat constricted preapically and the apex is curved dorsally; however, in D. kabilcevz sp. n. the apex is almost of equal width and not pointed, the tip is slightly rounded, whilst in D. schuberti the apex is evenly tapering to the pointed tip. Differences in the parameres ( Figs 16 and 18 ) are present, but we assume that these may turn out as variable and not helpful for identification when once more specimens will become available. The shape of the metafemur is another separating character: Whilst the apex of the metafemur is somewhat lobed backwards in D. kabilcevz sp. n. ( Fig. 13 ), it is evenly rounded in D. schuberti ( Fig. 14 ).

Notes: The distance (direct line) between the type locality of D. kabilcevz sp. n. and that of D. schuberti is ca. 350 km. Both localities belong to different mountain ranges—Eastern Taurus (Güney Doðu Toroslar) for the former and Middle-Taurus (Orta Toroslar; more exact: Tahtalý Daðlarý) for the latter.

Figures

FIGURES 15–22. Median lobe of aedeagus in ventral and lateral view and left paramere of: (15–16) Deronectes kabilcevz sp. n. (holotype); (17–18) Deronectes schuberti Wewalka, 1971 (paratype). Gonocoxa and gonocoxosternum of: (19–20) Deronectes propedoriae sp. n. (holotype); (21–22) Deronectes doriae Sharp, 1882 (female from Çam pass, Artvin province, Turkey).

FIGURES 1–4. Habitus of: (1) Deronectes kabilcevz sp. n. (holotype); (2) Deronectes schuberti Wewalka, 1971 (paratype); (3) Deronectes propedoriae sp. n. (holotype); (4) Deronectes doriae Sharp, 1882 (holotype).

FIGURES 5–8. Ventral surface in part of: (5) Deronectes kabilcevz sp. n. (holotype); (6) Deronectes schuberti Wewalka, 1971 (paratype); (7) Deronectes propedoriae sp. n. (holotype); (8) Deronectes doriae Sharp, 1882 (female from Çam pass, Artvin province, Turkey).

FIGURES 9–12. Last abdominal ventrite of: (9) Deronectes kabilcevz sp. n. (holotype); (10) Deronectes schuberti Wewalka, 1971 (paratype); (11) Deronectes propedoriae sp. n. (holotype); (12) Deronectes doriae Sharp, 1882 (oblique view; female from Çam pass, Artvin province, Turkey);

FIGURES 13–14. Left metafemur of: (13) Deronectes kabilcevz sp. n. (holotype); (14) Deronectes schuberti Wewalka, 1971 (paratype).