Endeochetus pressicornis, Colonnelli, 2014

Colonnelli, Enzo, 2014, Apionidae, Nanophyidae, Brachyceridae and Curculionidae except Scolytinae (Coleoptera) from Socotra Island, Acta Entomologica Musei Nationalis Pragae 54, pp. 295-422 : 398-399

Endeochetus pressicornis sp. nov.

( Figs 119, 122 )

Type series. HOLOTYPE: J ( NMPC), ‘ Yemen, Socotra Island // Firmihin , 400-500 m // N 12°28′27″, E 54°0′54″ // 22–25.vi.2009 // L. Purchart & J. Vybíral lgt.’ PARATYPES: 5 JJ, same label data as holotype (3 NMPC, 2 ECRI); 1 J, ‘ Yemen, Socotra Island // Wadi Zirik, 650-670 m // N 12°29′35″, E 53°59′28″ // 16.vi.2009 // L. Purchart lgt.’, ( NMPC); 3 JJ, ‘ 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.’ (2 NMPC, 1 ECRI); 1 ♀, ‘ Yemen, Socotra Island E // Homhil area, 400-510 m // N 12°34′25″, E 54°18′53″ // 9-10.ii.2010 // L. Purchart & J. Vybíral lgt.’ ( ECRI); 2 JJ 1 ♀, ‘ Yemen, Socotra isl., // Momi-Homhil, // 2.vi.2010, // V. Hula & J. Niedobová leg.’ (2 NMPC, 1 ECRI); 3 ♀♀, ‘ Yemen, Socotra Island // Dixam plateau, Wadi Zerig // pools, Juncus marsh; Dracaena // trees; cave 13-14.vi.2012 // 12°29.6′N, 53°59.5′E, 655 m’, ‘Socotra expedition 2012 // J. Bezděk, J. Hájek, V. Hula, // P. Kment, I. Malenovský, // J. Niedobová & L. Purchart leg.’ (2 NMPC, 1 ECRI).

Description. Male holotype. Body length 7.4 mm. Dark brown, moderately shining, rather coarsely punctured, rostrum, legs (extreme apex of femora and tarsi excepted) dark ferruginous. Dorsal vestiture on rostrum composed of sparse brownish half-recumbent minute hair-like scales; head almost bare; pronotum with curved slightly erect brownish small hair-like scales starting from centre of punctures and poorly visible; elytral intervals with 1–2 rows of suberect longer golden scales; legs with sparse hardly raised golden setae; femora basad of tooth, and internal margin of tibiae apicad of dilatation with long erect silvery or golden setae. Ventral side very densely and coarsely punctured with fairly dense suberect golden setae ( Fig. 119 ).

Head. Rostrum 0.78 as long as pronotum, strongly curved at antennal insertion, moderately densely punctured, basal half with low smooth carina, at antennal insertion rostrum is dilated, and weakly longitudinally strigose on its sides beyond this point up to distance from apex about same of rostral width where surface is densely punctured; in dorsal view rostrum is slightly dilated apicad of basal 3/4, then its sides concave up to near apex where rostrum slightly dilated again. Antennae inserted just basad of middle of rostrum; scape slightly compressed, almost straight and gradually but rather strongly clubbed; funicular antennomere I strongly compressed on basal half, not thicker than following antennomeres and one and half times as long as II; antennomeres II to VII strongly compressed, strongly transverse and progressively widening towards small club which is not distinct from funiculus and is only slightly longer than funicular antennomere VII. Head subglobular, minutely punctured, space between eyes as wide as little more than half of rostral width at base; eyes subtriangular and flat.

Pronotum 1.62 times as long as broad, scarcely constricted near truncate apex, base barely convex, disc flat on apical half and depressed in front of scutellar area, with large coarse round punctures; sides rounded, maximum width at middle. Scutellum invisible.

Elytra 1.81 times longer than wide and 1.81 times as long as pronotum, dorsum flat on basal 3/4, then moderately convex on apical declivity, base moderately concave, sides very slightly curved on basal two thirds, then moderately converging towards apex, maximum width at apical third. Striae formed by large subquadrate punctures from which originates an almost recumbent golden hair-like scale. Interstriae quite flat, not wider than striae and with row of roundish punctures.

Legs robust; femora slightly compressed, strongly clubbed and with large acute tooth, densely and coarsely punctured; tibiae compressed, slightly curved at extreme base, then almost straight, punctured, outer margin weakly keeled, inner one dilated in form of large tooth just basad of middle, concave and serrate apicad of widening; tarsi rather narrow, tarsomere III small and not bilobed.

Ventral side. Tubercles on basal margin of prosternum posteriorly to coxae quite strong; metaventrite and abdominal ventrites I and II with large shallow common impression. Habitus as in Fig. 96 .

Variability. Males are very similar to the holotype, whereas females differ from males just by their rostrum slightly longer and their lack of abdominal depressions. The density of punctures particularly on elytral intervals is also a little variable.

Male genitalia. Aedeagus as depicted in Fig. 122 .

Body length 6.2–7.5 mm.

Differential diagnosis. This new species is rather similar to E. rugulipennis sp. nov. from which it readily differs, as well as from all the known Endeochetus , by its strongly compressed antennae.

Etymology. The flattened antennal funiculus gives the name to the new species, the composite Latin adjective pressicornis (- is, - e) meaning ‘with compressed antennae’.

Distribution. Endemic to Socotra Island.

Figures

Figs 118–123. 118, 121 – Endeochetus saccofrancisci sp. nov., holotype: 118 – habitus; 121 – aedeagus in dorsal view. 119, 122 – Endeochetus pressicornis sp.nov.: 119 – habitus of the holotype; 122 – aedeagus of a paratype in dorsal view. 120, 123 – Endeochetus maculifer sp. nov.: 120 – habitus of the holotype; 123 – aedeagus of a paratype in dorsal view.

Figs 92–97. 92, 95 – Socotractus micans sp. nov.: 92 – habitus of the holotype; 95 – aedeagus of a paratype in dorsal view. 93–94, 96 – Systates hlavaci sp. nov.: 93 – habitus of the holotype; 94 – habitus in side view; 96 – aedeagus of a paratype in dorsal view. 97 – Systates spinipennis sp. nov., aedeagus of a paratype in dorsal view.