Paragolsinda obscura ( Matsushita, 1933 ) Matsushita, 1933

Yamasako, Junsuke & Ohbayashi, Nobuo, 2011, Review of the genus Paragolsinda Breuning, 1956 (Coleoptera, Cerambycidae, Lamiinae, Mesosini), with reconsideration of the endophallic terminology, Zootaxa 2882, pp. 35-50 : 44-46

Paragolsinda obscura ( Matsushita, 1933) comb. nov.

( Figs 24–25 , 29 , 38–44 )

Mesoereis obscurus Matsushita, 1933: 339 , pl. 5, fig. 5; Breuning, 1938: 390; Gressitt, 1951: 411; Breuning, 1959: 49.

Redescription. Male ( Figs 24–25 , 29 ). Body length 18.0–19.0 mm, body width 6.5–7.0 mm. Body black, evenly covered with light yellowish-brown pubescence. Head clothed with same pubescence; occiput with three longitudinal bands of dark brown pubescence of which middle one is narrow and indistinct, and lateral ones are wide and laid behind upper lobe of eyes. Antennal scape intermixed with light yellowish-brown or sometimes pale rose and dark brown pubescence; basal parts of third to the last antennal segments annulated by whitish or pale rose and light yellowish-brown pubescence; the remainders covered with dark brown pubescence. Pronotum intermixed with light yellowish-brown and dark brown pubescence, of which the dark one is forming a pair of indistinct longitudinal and median short apical bands; each lateral side with a wide indistinct longitudinal band of the same color pubescence. Elytra scattered throughout with small spots of dark brown pubescence, and sometimes ornamented with pale rose pubescence near basal and apical areas, with maculations consisting of dark brown pubescences as follows: two intermittent transverse zigzag bands on basal fourth and apical third; a short and narrow longitudinal band near base between scutellum and humerus. Legs with femora and tibiae with annulations consisting of intermixed white (or sometimes pale rose) and light brown pubescence.

Body elongated, oblong in shape. Head slightly narrower than pronotum, uniformly micro-sculptured with a few punctures; eyes strongly emarginated; lower lobes well prominent, slightly wider than long, about 0.8 times as long as gena.

Antennae about 1.5 times as long as body length, surpassing elytral apices at apex of sixth segment; third segment the longest, about 1.6 times as long as scape and about 1.4 times as long as fourth.

Pronotum slightly convex above, widest near middle, about 1.4 times as wide as long, with three indistinct discal tubercles and without lateral projection; base about 0.7 times as wide as elytral width at humeri; disk sparsely punctured, with irregular rugae throughout, a few granules and transverse furrow near apex.

Scutellum wide obtrapezoidal.

Elytra long, about 1.9 times as long as width at humeri, about 3.6 times as long as pronotal length, almost parallel-sided with distinct constriction behind sub-quadrate humeri, arcuately rounded near apex; each disk moderately punctured on basal half, thence apicad getting slightly smaller and sparser, with a low, obtuse round boss with a few indistinct granules near base.

Male genitalia ( Figs 38–44 ). Tegmen in lateral view weakly curved, oblong rhombic-shaped and widest just before middle in ventral view; ringed part in ventral view slightly expanded laterad before middle of tegmen, thence arcuately narrowed basad; lateral lobes in ventral view moderate in length, about one-fourth of the total length of tegmen; each lobe feebly longitudinally swollen ventrally on basal half, with inner side once feebly emarginated near base and outer side arcuately narrowed to rounded apex, with two kinds of setae, of which one is long, thick and concentrated near apex, and the other short and thin arising mainly from latero-ventral side.

Median lobe in lateral view evenly curved; apex roundly acuminate in ventral view; median struts started from before middle.

Endophallus in lateral view slightly longer than twice the length of median lobe. The relative length of median lobe and endophallus with each broad membrane area as follow: median lobe: total length of endophallus: BPH: MPH: APH= 4.1: 10.0: 2.2: 7.0: 0.8. MPH with MT+CT nearly 0.6 times as long as endophallus; PB about 0.1 times as long as endophallus. APH rather short, swollen in oval shape.

MSp sparsely distributed in apical 2/3 of MT+CT; LSp relatively large, uni-dentate, rather thick and short, moderately arranged in latero-dorsal side of basal 1/3 of MT+CT; SSp densely arranged on dorsal side and rather sparse on ventral side, evenly covered PB; MSp area and LSp area adjacent. LSp area separated some distance from SSp area.

ED arising from near base of APH on dorsal side. AS semi-membranous and uncolored, connected to ED at base.

Female. Body length 15.0–18.0 mm, body width 5.0– 6.5 mm. Almost identical to male in general appearance. Antennae about 1.2 times as long as body, surpassing elytral apices at the apex of seventh segment.

Distribution. Taiwan.

Type material. Holotype housed in SEHU “Hori/ Formosa / 7. 24. 1928 / K. Kikuchi”, “ Mesoereis obscurus Matsush. ”, “ Holotypus ”, “M. MATSUSHITA COLLECTION”. The photo of the holotype is shown in “Collection of Systematic Entomology, Hokkaido University” (http://neosci-gw.museum.hokudai.ac.jp/html/modules/pukiwiki/1757.html).

Specimens examined. 2 females ( EUMJ), Mt. Kuantao, Nantou Hsien, Taiwan, 29. IV, 1996, Y, Notsu leg.; 1 male, Nanshanchi, Nantou, Formosa, 29–30. IV, 1976, T. Shimomura leg.; 1 female, same locality, 27. V, 1978, T. Senoo leg.; 1 female, Mt. Kuanto Shan, Nantou Hsien, Formosa, 17. V, 1996, S. Tsuyuki leg.; 1 male, Shihtyuto, Lenai, Nantou County, Taiwan, 16. VI, 2002.

Notes. This species was described under the genus Mesoereis by Matsushita (1933) based on a male specimen from Taiwan together with M. koshunensis which is the type species of Mesoereis . However, the external features of this species are very similar to Paragolsinda fruhstorferi or P. tonkinensis . Additionally, the endophallic structures of this species are very similar to P. t o n k i n e n s i s. For these reasons, this species should belong to the genus Paragolsinda .

This species can be easily distinguished from other congeners by the following features: elytra with basal bosses rather low and round, punctures distributed throughout though becoming shallower and sparser apicad; lateral lobe of tegmen without distinct ridge near base.

Figures

FIGURES 20 – 27. Habitus of Paragolsinda spp. 20 – 21. P. fruhstorferi (Holotype); 22 – 23. P. tonkinensis; 24 – 25. P. obscura; 26 – 27. P. siamensis sp. nov. (Holotype) — 20, 22, 24, 26. ventral views; 21, 23, 25, 27. lateral views.

FIGURES 28 – 30. Frontal view of Paragolsinda spp. 28. P. tonkinensis; 29. P. obscura; 30. P. siamensis sp. nov. (Holotype).

FIGURES 38 – 44. Male genital organ of P. obscura. 38. Tegmen in ventral view; 39. ditto in dorsal view; 40, ditto in lateral view; 41. median lobe in ventral view; 42. ditto in dorsal view; 43. ditto in lateral view; 44. median lobe with endophallus in lateral view. Scales: 1.0 mm.