Parallelodemas perfectum Faust

Prena, Jens & Zhang, Runzhi, 2014, A taxonomic revision of Parallelodemas Faust from South China (Coleoptera, Curculionidae, Baridinae), with notes on sexually dimorphic characters, Deutsche Entomologische Zeitschrift 61 (2), pp. 105-119 : 114-115

Parallelodemas perfectum Faust

Parallelodemas perfecta [sic] Faust 1894: 307. Lectoype male, designated here, labeled "♂ Carin/ Cheba", " perfecta / Faust", "Coll. J. Faust/ Ankauf 1900", “Typus”, "Staatl. Museum für / Tierkunde Dresden", "Lectotype/ Parallelodemas perfectum / Faust (Prena & Zhang/ design. 2014)" (SNSD). Paralectotypes 1 (female), Carin Cheba, 900-1100 m, V XII.1888 (MSNG). Morimoto and Yoshihara (1996: 17), designation as type species for Parallelodemas .

Diagnosis.

Only two specimens of the sexually dimorphic Parallelodemas perfectum are known, one of each gender. The species forms a complex with Parallelodemas feae , Parallelodemas tardum , Parallelodemas tumens and Parallelodemas vicinum , all of which have flush eyes, thoracic ventrites with undivided setae and a male mesotarsus with outward-directed clavate setae (Fig. 6). The profemur of the male Parallelodemas perfectum is ventrally more expanded than in the other species. Parallelodemas feae has ventrally hirsute femora; Parallelodemas tardum has a shorter male rostrum; Parallelodemas tumens is smaller (<5 mm); Parallelodemas vicinum usually has denser vestiture on the mesepisternum and a less curved female rostrum. The few available female Parallelodemas perfectum and Parallelodemas tardum could not be distinguished with confidence.

Redescription.

Length 7.0-7.8 mm, width 1.8-1.9 mm; integument black; ventral side with undivided setae, basic vestiture inconspicuous on pronotum and elytron, white squamiform setae at base of elytral interstriae 3 and 4, postmedially on interstriae 3-5, on dorsal apex of mesepimeron, metepisternum, prosternum, ventral face of pro- and mesofemora, dorsal face of metafemur and occasionally on basolateral angles of pronotum; eyes flush with head contour; frons and base of rostrum glabrous; male rostrum 1.06 × as long as pronotum, ventrally without setae, prorostrum 0.36 × rostral length and slightly spatulate in dorsal view, epistome very slightly notched, antennal scape with long, cupreous setae, club 1.6 × as long as wide; female rostrum 1.02 × as long as pronotum, prorostrum 0.58 × rostral length; prosternum slightly tumescent (male) or gradually sloping (female) in front of coxa, basal lobe notched; pro- and mesofemora ventrally with slender (male) or squamiform (female) setae, male profemur somewhat angularly produced ventrally; tarsus with tarsite 3 relatively small and excised to basal third, tarsite 5 longer than 3 and distinctly protruding beyond anterior margin of 3, male mesotarsus with moderately long, clavate, outward directed setae; penis 3.1 × as long as wide, apex roundly narrowed with slightly produced tip (as Parallelodemas feae , Fig. 19), internal sac with short, complex sclerite (double hook); spermatheca with nodulus long and perpendicular to long axis of collum, ramus obsolete (as Parallelodemas impar , Fig. 26).

Distribution.

The species is known from one site in Myanmar.

Material examined.

MYANMAR. Kayin: Karen Hills [ca. 25-35 km NE of Taungoo], V/1888, L. Fea (MSNG 1, SNSD 1).