Hydraena (s.str.) ispirensis Kasapoğlu, Jäch & Skale

Lu, Ahmet Kasapo Ġ, Jäch, Manfred A. & Skale, André, 2010, Two new species of Hydraena (s. str.) Kugelann (Coleoptera: Hydraenidae) from northern Turkey, Zootaxa 2353, pp. 62-64 : 63-64

Hydraena (s.str.) ispirensis Kasapoğlu, Jäch & Skale sp. n.

Type locality: Small stream, ca. 20 cm wide, clean, sandy, 40°31'45''N, 40°55'14''E, ca. 12 km NNW Ispir, Erzurum Province, northeastern Turkey.

Type material: Holotype ( NMW): “NO Türkei, Erzurum \ ca. 12km NNW \ Ispir, 30.08.2001 \ leg. A.Kasapoglu”. Specimen dry mounted; aedeagus glued with water soluble glue to the same card. Paratypes (CKA: 2

, NMW: 1, 1) same label data as holotype. The single female is teneral.

Differential diagnosis: 2.0–2.1 mm long. Black (teneral specimens are brownish); appendages reddish brown, tips of palpi darkened.

Externally, this species resembles H. hainzi Jäch, 1988 , described from southeastern Turkey. It can be distinguished from the latter primarily by the male metatibia ( Fig. 7 ), which is more slender, provided with a conspicuous, very acute tooth and a series of denticles; in H. hainzi the metatibial tooth is bluntly rounded, and the denticles are hardly perceptible.

Aedeagus ( Fig. 6) : Main piece almost straight in lateral view, distinctly bisinuous in ventral view; with two small subapical setae and with two groups of approx. six setae on the right side of the apical third; phallobase strongly asymmetrical; distal lobe composed of several, weakly sclerotized, densely arranged lobes, which project from the apex of the main piece in right angles. Right paramere very short, about half as long as main piece, thin, irregularly enlarged apically, with a group of moderately long apical setae; left paramere longer than main piece, slightly sinuous, more or less gradually widened towards apex, with a fringe of apical setae and numerous setae on inner face.

The aedeagus of H. ispirensis agrees in general appearance (setation of main piece, arrangement of distal lobe, size and shape of parameres) with that of H. hainzi . The latter differs mainly in the main piece (see Jäch 1988: Fig. 8), which is strongly thickened basally (lateral view).

Female tergite X ( Fig. 4): Transverse; anterior margin slightly emarginate, with a medially interrupted fringe of comparatively short trichoid setae (a few longer ones laterally); disc with squamose setae, and very few tiny trichoid setae apically.

Gonocoxite ( Fig. 5) : Distinctly crescentic; basal apophyses long and slender; inner plate widely projecting basally, basal margin notched medially.

Discussion: This species is also a member of the Hydraena rufipes species group. Without doubt, it is closely related to H. hainzi . On the basis of some aedeagal similarities, H. kurdistanica Jäch, 1988 and H. virginalis Janssens, 1963 may also be related to the new species.

Distribution: Known only from the type locality so far.

Etymology: Named for the town of Ispir, in the vicinity of which this species has been collected.

Figures

FIGURES 1 – 3. Hydraena rukiyeae, 1) aedeagus of holotype, lateral view, 2) female tergite X, 3) gonocoxite. FIGURES 4 – 7. Hydraena ispirensis, 4) female tergite X, 5) gonocoxite, 6) aedeagus of holotype, a) lateral view, b) ventral view (parameres omitted), 7) male metatibia.