Golsinda malaysiaca Yamasako & Makihara

Yamasako, Junsuke & Makihara, Hiroshi, 2011, A new species of the genus Golsinda Pascoe, 1857 (Coleoptera, Cerambycidae, Lamiinae, Mesosini) from the Malay Peninsula, with a nomenclatural note of the genus, Zootaxa 3047, pp. 63-68 : 64-67

Golsinda malaysiaca Yamasako & Makihara , sp. nov.

Type material. Holotype ( FFPRI): 1 male, “Pasoh Forest Reserve/ Negeri Sembilan/ Pen. Malaysia / Coll. K. Maetô” [printed on white label], “Tower-B- 25/ 11. Apr. 1993” [printed on white label], “P93-2008” [printed on white label].

Description. Male ( Fig. 1 ). Length 15.0 mm, width 5.7 mm (n = 1). Body dark brown. Head with front with a pair of orange maculae which are fringed with white pubescence; occiput with four longitudinal narrow bands which are consisted of orange pubescence and surrounded with white pubescence, of which middle two bands extended from vertex are connected posteriorly and forming Y shaped maculation, and other two bands are laid on behind of upper eye lobes respectively; each tempora with a longitudinal wide band of same pubescence which is obliquely extended from gena. Pronotum with white and dark brown pubescence, scattered with several maculations which are consisted of same pubescence of head. Elytra scattered with many oblong maculations which are consisted of same pubescence of head and pronotum. Antennae with scape with white and dark brown pubescence; each basal part of third to the last segments annulated by white pubescence; the remainders covered with dark brown pubescence. Legs with femora annulated by orange and white pubescence; tibiae annulated by white pubescence near base and middle.

Body oblong boxy in shape.

Head slightly narrower than pronotum, uniformly microsculptured. Eyes strongly emarginated; lower lobes well prominent, wider than long, 0.7 times as long as width, shorter than gena below it, 0.7 times as long as gena.

Antennal tubercles hardly elevated. Antennae long and rather slender, surpassing elytral apices in the apices of sixth segments; relative lengths of each segment from scape to the last segment as follow (n = 1): 8.5: 1.0: 8.0: 8.0: 6.3: 5.8: 5.3: 5.0: 4.8: 4.8: 6.0; scape elongated cuneiform, well thickened apicad, with a cicatrix on the apex; third segment slightly shorter than scape and almost same in length to fourth.

Pronotum evenly convex, widest near the middle, thence slightly narrowed basad and apicad, almost same as wide as long, distinctly narrower than the width of elytral humeri, 0.7 times as wide as conjoint width across humeri; disk with a pair of obtuse bosses and irregular transverse rugae.

Prosternal process with lateral margins ridged, feebly projected posteriorly, nearly truncated in lateral view. Mesosternal process with a developed tubercle on the center near apex, nearly truncated in lateral view.

Elytra long, 1.6 times as long as conjoint width across humeri, 2.5 times as long as pronotal length, almost parallel sided in basal half, thence slightly arcuately narrowed apicad; apex almost truncated with sub-quadrate inner angle; punctures moderate in density on basal half, thence smaller apicad, without long suberect hairs and bosses or tubercules; humeri subquadrate and slightly expanded laterad.

Legs moderate in length; mesotibiae without distinct notches on anterior side.

Male genitalia ( Fig. 2 ). Tegmen weakly curved in lateral view, oblong rhombic, widest just before middle in ventral view. Ringed part slightly expanded before middle, thence arcuately narrowed basad. Lateral lobes about one-fifth of the total length of tegmen; ventral side obtusely and transversally swelled at base, thence deeply excavated behind; lateral side evenly and weakly narrowed toward rounded apex; two kinds of setae present, of which one is long and thick, arising from basal half and concentrated near apex, the other is rather short and thin, arising mainly from latero-ventral outsides and ridge line of basal bosses.

Median lobe weakly curved in lateral view; apex roundly acuminate in ventral view; median struts dehiscent near before middle.

Endophallus slightly longer than twice length of median lobe, divided into BPH, MPH and APH. The relative length of median lobe and endophallus with each membrane area as follow (n = 1): median lobe: total length of endophallus: BPH: MPH (MT+CT: PB): APH = 4.1: 10.0: 1.9: 6.9 (6.6: 0.3): 1.2. MPH delimited into MT+CT and PB by a constriction. APH well developed, swollen in oval shape, with ED and AS; ED arising from near the apex of APH on dorsal side; AS laid on dorsal side of the apical area of APH, consisted of a pair of rod like sclerites which are softly sclerosed and slightly colored.

Endophallus with three kinds of spicules as MSp, LSp, and SSp. MSp sparsely scattered on apical half of MT+CT. LSp large, long and uni-dentate, densely distributed on latero-dorsal side of basal half of MT+CT and rather sparsely distributed on ventral side of basal half of MT+CT. SSp thick, short and uni-dentate, evenly covered PB. LSp area and MSp area closely arranged each other. SSp area slightly separated from LSp area.

Distribution. Malay Peninsula. (Known only from the type locality.)

Etymology. The specific epithet is attributable to the country of the type locality.

Diagnosis. This species can be distinguished from the other congeners by having elongated cuneiform antennal scape which is slightly longer than the third antennal segment.

Remarks. This genus has been known from Indochina, Sumatra and Borneo. It has never been known from Malay Peninsula. This new species fills the gap of the genus distribution.

The four species of the genus are very similar and have close genealogical relationship to each other.

Figures

FIGURE 1. Habitus of Golsinda malaysiaca sp. nov. (holotype) a. Ventral view; b. lateral view.

FIGURE 2. Male genital organ of Golsinda malaysiaca sp. nov. (holotype) a. Tegmen in ventral view; b. ditto in dorsal view; c. ditto in lateral view; d. median lobe in ventral view; e. ditto in dorsal view; f. ditto in lateral view; g. median lobe with endophallus in lateral view. Scale: 1.0 mm. (Abbreviations see the text.)