Revision of the East Mediterranean Orthomus (Coleoptera, Carabidae, Pterostichini), with description of Parorthomus gen. n. socotranus sp. n. from Socotra Island and key to the Old World genera of subtribe Euchroina

Abstract

The East Mediterranean species of Orthomus Chaudoir, 1838 are revised. The type series of Feronia longula Reiche & Saulcy, 1855, F. berytensis Reiche & Saulcy, 1855, F. proelonga Reiche & Saulcy, 1855, Orthomus longior Chaudoir, 1873, O. sidonicus Chaudoir, 1873, and O. berytensis akbensis Mateu, 1955 were studied and lectotypes for the first four are designated. Also, the following nomenclatural acts are proposed: Feronia proelonga Reiche & Saulcy, 1855, syn. n. of Orthomus berytensis (Reiche & Saulcy, 1855); Feronia elongata Chaudoir, 1859, syn. n. of Orthomus berytensis (Reiche & Saulcy, 1855); Orthomus sidonicus Chaudoir, 1873, syn. n. of Orthomus longior Chaudoir, 1873; Orthomus velocissimus andalusiacus Mateu, 1957, syn. n. of Orthomus velocissimus akbensis Mateu, 1955, new assignment for Orthomus berytensis akbensis Mateu, 1955. As a result, three species of the genus inhabit the East Mediterranean biogeographical region: O. berytensis, O. longior, and O. longulus. A key to these three species is given. O. longior is recorded for Turkey and Syria for the first time. In addition, a new synonymy of two West Mediterranean taxa is proposed: O. szekessyi (Jedlička, 1956), syn. n. of O. balearicus (Piochard de la Brûlerie, 1868), and a new genus and a species are described: Parorthomus gen. n. socotranus sp. n. (type locality: Republic of Yemen, Socotra Archipelago, Socotra Island, Fimihin env., 530 m.a.s.l.). Illustrations of the species dealt with here are provided including external characters, habitus, mentum and submentum, and genitalia are provided. Nine genera of the "African Series" of subtribe Euchroina Chaudoir, 1874 are keyed for the first time. Checklists of the species of Orthomus and of the Old World euchroine genera are given.

Keywords: Carabidae; Coleoptera; East Mediterranean; Orthomus; Parorthomus; Pterostichini; Republic of Yemen; Spain; checklist; key; lectotype designation; new genus; new species; new synonyms; taxonomy.

Figures 1–3.

Habitus. 1 Orthomus berytensis (Reiche & Saulcy, 1855), male, “Tel-Aviv” 2 Orthomus longior Chaudoir, 1873, male, “Upper Galilee, Ya’ar Bar’am” 3 Orthomus longulus (Reiche & Saulcy, 1855), male, “Upper Galilee, Ha Khula Valley, Ma’agar Einan lake”. Scale bar = 2 mm.

Figures 4–7.

Median lobe of aedeagus, lateral view. 4 Orthomus berytensis (Reiche & Saulcy, 1855), lectotype of Feronia berytensis 5 Orthomus longior Chaudoir, 1873, paralectotype of Feronia longula Reiche & Saulcy 6 Orthomus longulus (Reiche & Saulcy, 1855), male, “Megiddo” 7 Orthomus velocissimus akbensis Mateu, 1955, holotype of Orthomus barbarus akbensis. Scale bar = 0.5 mm.

Figures 8–11.

Median lobe of aedeagus, dorsal view. 8 Orthomus berytensis (Reiche & Saulcy, 1855): lectotype of Feronia berytensis 9 Orthomus longior Chaudoir, 1873, paralectotype of Feronia longula Reiche & Saulcy 10 Orthomus longulus (Reiche & Saulcy, 1855), male, “Megiddo” 11 Orthomus velocissimus akbensis Mateu, 1955, holotype of Orthomus barbarus akbensis. Scale bar = 0.5 mm.

Figures 12–15.

Right paramere, internal face. 12 Orthomus berytensis (Reiche & Saulcy, 1855): lectotype of Feronia berytensis 13 Orthomus longior Chaudoir, 1873, paralectotype of Feronia longula Reiche & Saulcy 14 Orthomus longulus (Reiche & Saulcy, 1855), male, “Megiddo” 15 Orthomus velocissimus akbensis Mateu, 1955, holotype of Orthomus barbarus akbensis. Scale bar = 0.2 mm.

Figures 16–17.

Pronotum posterior right angle. 16 Orthomus berytensis (Reiche & Saulcy, 1855), male, “Tel-Aviv” 17 Orthomus longior Chaudoir, 1873, male, “Upper Galilee, Ya’ar Bar’am”.

Figure 18.

Parorthomus socotranus sp. n., female paratype, habitus.

Figures 19–22.

Parorthomus socotranus sp. n., paratype, male genitalia: 19 median lobe of aedeagus, left lateral aspect 20 median lobe of aedeagus, dorsal aspect 21 right paramere, internal face 22 left paramere, internal face. Scale bars = 0.5 mm (Figs 19–20), 0.2 mm (Figs 21–22).

Figures 23–24.

Parorthomus socotranus sp. n., paratype, female genitalia, ventral view: 23 left ovipositor 24 female reproductive tract (spermathecal complex and ovipositor). Legend: as apical stylomere; bc bursa copulatrix; bs basal stylomere; co common oviduct; di diverticulum; es ensiform setae; ns nematiform setae; ov ovipositor; rc receptaculum of spermatheca; smc seminal canal of spermatheca; sg appended gland of spermatheca; spc spermathecal canal; vf valvifer. Scale bars = 0.2 mm (Fig. 23), 0.5 mm (Fig. 24).

Figures 29–31.

Habitats of Parorthomus socotranus sp. n. in Socotra. 29 Homhil protected area, November 2003 30 Al Haghier Mts., December 2003 31 Wadi Ayhaft, January 2004 (all photographs by JF).

Figures 25–28.

Mentum and submentum, ventral aspect (gray arrow indicating labial pits): 25 Orthomus barbarus barbarus (Dejean, 1828), female, Spain, “Laguna Salinas (Alicante)” 26 Abacillius basilewskyi Straneo, 1962, holotype 27 Abacillodes jocquei Straneo, 1988, holotype 28 Parorthomus socotranus sp. n., male paratype, “Fimihin”. Scale bar = 0.5 mm.