Ochthebius hajeki, Jäch & Delgado, 2014

Jäch, Manfred A. & Delgado, Juan A., 2014, Ochthebius hajeki sp. nov. from Socotra Island (Coleoptera: Hydraenidae), Acta Entomologica Musei Nationalis Pragae 54, pp. 115-119 : 116-118

publication ID	https://doi.org/ 10.5281/zenodo.5312168
publication LSID	lsid:zoobank.org:pub:6A72B4B9-FB47-4165-86D8-3654293F09D3N
persistent identifier	https://treatment.plazi.org/id/03F987C9-E678-FFB8-0485-3E63FCFE645A
treatment provided by	Marcus
scientific name	Ochthebius hajeki
status	sp. nov.

Treatment

Ochthebius hajeki View in CoL sp. nov.

( Figs 1–2 View Fig View Fig )

Type locality. Yemen, Socotra Island, Dixam Plateau, Firmihin, 12°28.6′N 54°01.1′E, 490 m a.s.l. ( Figs 3–4 View Figs 3–4 ).

Type material. HOLOTYPE: J ( NMPC): ‘ YEMEN SOCOTRA ISLAND Dixam plateau 14.-15.vi.2012 FIRMIHIN, Dracaena woodland 12°28.6′N 54°01.1′E, 490 m’, ‘ SOCOTRA expedition 2012 J. Bezděk, J. Hájek, V. Hula, P. Kment, I. Malenovský, J. Niedobová & L. Purchart leg.’. PARATYPES: 42 specimens ( IBEB, NHMW, NMPC): same locality label as holotype [two paratypes kept in alcohol were sent to IBEB for future DNA-sequencing].

0.4–0.5. Base of male tarsi with adhesive setae. Last abdominal tergite of female with fringe of bristles.

Variability. The pronotal foveae are usually distinct, but on average not very deeply impressed; in one of the male paratypes the posterior ones are almost completely effaced.

Differential diagnosis. Ochthebius hajeki sp. nov. is a member of the O. foveolatus subgroup (sensu JÄCH 1991). This subgroup consists of almost 30 species, which are more or less confined to the Palaearctic Realm ( JÄCH 1991, DELGADO & JÄCH 2009, JÄCH & DELGADO 2010). A few species are distributed along the northern fringe of the Oriental Region, e.g. in the Himalayas and in Taiwan. No species of this group has so far been recorded from the African continent south of the Sahara.

Two species of the O. foveolatus subgroup occur in the Arabian Peninsula: O. innexus Balfour-Browne, 1951 , and O. harteni Jäch & Delgado, 2010 . These two species can be easily distinguished from the new species by the paler colouration and the aedeagi (see JÄCH 1991: Fig. 21, and JÄCH & DELGADO 2010: Figs 23–26).

Etymology. Named for Jiří Hájek (NMPC), who collected the majority of the type specimens.

Habitat. All specimens were collected in a hygropetric habitat, where a film of water was flowing over orange algae on travertine rock ( Figs 3–4 View Figs 3–4 ). Limnebius dioscoridus was collected there as well, but it was also found in other microhabitats on the same rock.

Distribution. So far known from one locality on Socotra Island, Yemen.