Discozantaena endroedyi, Perkins, Philip D., 2005

Perkins, Philip D., 2005, A revision of the South African endemic humicolous beetle genus Discozantaena Perkins and Balfour­Browne (Coleoptera: Hydraenidae), Zootaxa 915, pp. 1-48 : 8-9

Discozantaena endroedyi new species

( Figures 2 , 13 , 25 )

Type Material. Holotype (male): Cape Prov., Cape­Cederberg, jeep track, sifted marsh shore, elev. 1130 m, 32° 28' S, 19° 14' E, 7 November 1983, Endrödy­Younga (#2055); deposited in the TMSA. Paratypes (87): Same data as holotype (65 TMSA). Cape Province: Katberg F., Beaufort D., arbres pourris, ZA 65, 1–30 January 1961, N. Leleup — (1 TMSA); Katberg F., Beaufort D., humus, ZA 64, 1–30 January 1961, N. Leleup — (1 TMSA); Devil's Kloff, sifted, elev. 850 m, 32° 28' S, 19° 6' E, 30 October 1981, Endrödy­ Younga (#1909) — (16 TMSA); Little Karroo , Rus­en­vredewaterf, from waterfall, 33° 24' S, 22° 22' E, 22 October 1993, Endrödy­Younga (#2896) — (2 TMSA); SE Cape, Alexandria For. St., UV light collection, 33° 43' S, 26° 23' E, 4 December 1987, Endrödy­ Younga (#2552) — (1 TMSA); Sederberg, Middelburg, (Elskloofrivier), humus under bushes, ZA 100, elev. 1400 m, 33° 26' S, 19° 36' E, 1–30 July 1962, N. Leleup — (1 TMSA).

Other material examined: Same data as holotype (1103 TMSA). Representative specimens to be deposited in AMG, ANIC, BMNH, CMNH, FMNH, MCZ, NMW, QMBA, SAMA, SAMC, and USNM.

Diagnosis. Recognized by the straight anterior margin of the clypeus, the densely, uniformly granulate pronotal disc, and the comparatively large size, length ca. 2.14 mm ( Fig. 2 ).

Description. Size (length/width, mm) holotype: body (length to elytral apices) 2.14/ 1.07, head 0.38/0.58, pronotum 0.50/0.88, elytra 1.25/1.07. Dorsum brown, head and disc of pronotum piceous; venter brown, elytral epipleurae and pronotal hypomeron lighter. Frons flattened but feebly gibbous between oblique foveae, disc moderately shining; decumbent pubescence short, small granule at base of each seta, on disc setae sparse, directed posteriad, near eyes setae denser, directed mediad. Clypeus transverse, anterior margin straight, anterior angles rounded; sculptured and clothed as frons, but less densely. Labrum shining, very finely sparsely setose; apicomedian emargination slightly reflexed.

Pronotum very transverse; anterior margin straight, median 1/2 with narrow hyaline border; anterior angles sharply rounded; sides weakly arcuate except emarginate before acute, tooth­like posterior angles; posterior margin arcuate except emarginate near posterior angles. Sides minutely denticulate. Disc quite strongly roundly elevated between anterior and posterior broadly U­shaped transverse impressions; clothed with moderately dense, short decumbent golden setae; socket of each seta very indistinct but anterior rim raised to form distinct oblong granule; granules rather uniformly dense on disc, much sparser laterally; interstices strongly shining. Lateral depressions shining between granules.

Elytra with anterior angles sharply rounded, sides weakly arcuate to middle, then markedly attenuate to very narrowly truncate apices; lateral to tenth series broadly explanate almost to apex, moderately shining; sides minutely serrate, pubescence dense, short and overlapping. Ten seriate punctate, but two additional series on explanate margin, series barely striate impressed, if at all, punctures transversely oval, those near base contiguous longitudinally, posteriorly becoming little more separated and slightly smaller, each with distinct short decumbent seta, serial setae overlapping, each setal base with minute granule. Intervals impunctate, shining, flat, slightly wider than serial punctures. Sutural margin raised slightly in posterior 1/2.

Metasternum with narrow midlongitudinal furrow. Thoracic sterna and abdominal ventrites 1–4 entirely and 5 basally clothed with sparse short pubescence, especially sparse medially, cuticle micropunctulate.

Aedeagus total length 0.75 mm; mainpiece length 0.43 mm; mainpiece distal widened area and large collar diagnostically shaped; flagellum long, forming corkscrew spiral ( Fig. 13 ).

Etymology. Named in honor of the late Sebastian Endrödy­Younga.

Distribution. Presently known from Cape Province, in an east­west distribution pattern ( Fig. 25 ).

Figures

FIGURE 2. Discozantaena endroedyi holotype. Dorsal and lateral habitus.

FIGURE 13. Discozantaena endroedyi. Aedeagus of holotype.

FIGURES 23 – 25. Discozantaena distribution maps. — 23. All Discozantaena collecting sites. — 24. D. sequentia. — 25. D. endroedyi.