Hoplasoma bosi, Bezděk, 2008

Bezděk, Jan, 2008, A review of the genus Hoplasoma (Coleoptera: Chrysomelidae: Galerucinae) from Sulawesi, Indonesia, with the description of H. bosi sp. nov., Zootaxa 1941 (1), pp. 55-66 : 63-65

Hoplasoma bosi sp. nov.

( Figs. 7 , 13 , 19–23 , 25)

Type locality. Sulawesi Selatan prov., Latimodjong Mts. , 3°27´S 120°4´E. Type material. Holotype ♂ ( BMNH), labelled: „ Celebes. / G. Heinrich. / B. M. 1933-117. [w, p] //

Celebes / Latimodjonggeb. / 18-´500m Ende 7.1930 / G. Heinrich [w, p]“. Paratypes: 2 ♀♀ ( BMNH), labelled: „ Celebes. / G. Heinrich. / B. M. 1933-117. [w, p]“. The specimens are provided with one additional red label: „ HOLOTYPUS [or PARATYPUS, resp.], / Hoplasoma / bosi sp. nov. / J. Bezdĕk det. 2008“ .

Description. Body elongate, subparallel, nearly glabrous. Colouring yellowish brown. Apices of mandibles, abdomen and metasternum black. Middle and hind legs black including coxae and trochanters, the last two tarsomeres dark brown. Fore legs brown, slightly darker than the rest of the body. Antennae completely yellow.

Measurements. Male (holotype): 12.7 mm; females: 12.3–12.9 mm.

Male. Labrum transverse, covered with several pale setae, anterior margin slightly sinuate, lustrous. Anterior part of head lustrous, sparsely covered with small punctures and pale setae. Frontal tubercles large, slightly elevated, subquadrate, with the inner anterior tips prolonged posteriad, lustrous. Both tubercles separated from each other by furrow as well as posterior margin of frontal tubercles from frons. Frons distinctly impressed just behind frontal tubercles, lustrous. Vertex very finely covered with almost indistinct puntures, lustrous. Antennae slender, 0.70 times as long as the body, length ratio of antennomeres 1 to 11 equal to 17-5- 14-18-19-19-19-16-16-14-17.

Pronotum lustrous, glabrous, almost impunctate, subquadrate, 1.3 times as broad as long, widest at the first third. Anterior margin straight, anterior angles moderately projected onward. Lateral sides slightly rounded in the anterior half, parallel posteriad. Posterior margin almost straight, very slightly sinuate, posterior angles obtuse. Anterior margin unbordered, lateral margins very deeply bordered, posterior margin moderately bordered. Surface with basal half slightly impressed. All angles with setigerous pore bearing long pale seta, lateral margins with several short pale hairs.

Scutellum subtriangular with apex cutted, lustrous, glabrous, impunctate.

Elytra very long, 2.4 times as long as wide and 0.77 times as long as the body; lustrous, subparallel, slightly divergent posteriad, with maximal width at the last quarter, nearly glabrous, with very scarce short pale hairs. Humeral calli well developed. Lateral sides of elytra with two indistinct obtuse ribs starting from humeral calli and disappearing before apex. Surface between the ribs slightly impressed. Elytral surface covered with very small, almost indistinct confluent punctures. Apical angles slightly protracted. Epipleura very narrow, gradually tapering, disappearing at two thirds of elytra. Macropterous.

Legs slender, densely covered with short pale hairs. Apex of hind tibia triangularly extended in lateral view (Fig. 25). Hind trochanters enlarged, flattened, inner side moderately excavated. First tarsomeres of all tarsi enlarged ( Figs. 20–22 ). Claws deeply split.

Ventral surface semiopaque, finely punctate and covered with microsculpture and dense pale hairs. The middle of posterior margin of the second ventrite with one pair of small, short and slender processions. Median plate of the last ventrite with obtuse ridge in the middle ( Fig. 19 ).

Aedeagus very long, ca. twice longer than in other Sulawesian species, nearly parallel, slightly left gibbous at the basal third, apex widely subtriangular ( Fig. 13 ).

Female. Antennae 0.60 times as long as the body. First tarsomeres of all tarsi not enlarged. Last ventrite entire. Spermatheca as in Fig. 23 .

Differential diagnosis. Hoplasoma bosi sp. nov. can be easily distinguished from all its congeners by very long elytra, 2.4 times as long as wide (maximaly twice in other Hoplasoma species ) and by very long aedeagus ( Fig. 13 ). Habitually, the nearest species is H. sulawesianum . Hoplasoma bosi sp. nov. differs from it, besides above mentioned characters, in the structure of hind legs in male which have triangularly extended apex of tibia (not extended in H. sulawesianum ) ( Figs. 24 –25) and enlarged and flattened hind trochanters (not enlarged in H. sulawesianum ). Another similar species, H. celebense , can be easily distinguished by yellow metasternum. The pair of appendages on the second ventrite in male of H. bosi sp. nov. ( Fig. 19 ) is shorter and narrower than in other Sulawesian species.

Distribution. So far known only from the type locality Latimodjong Mts., Sulawesi Selatan prov.

Etymology. The new species is dedicated to Dr. Merijn Bos (Stuttgart, Germany), who had merit in recent zoological exploration of Sulawesi.

Figures

FIGURES 2–7. Habitus of males of Hoplasoma. 2—H. apicale (lectotype); 3—H. celebense; 4—H. paradoxum (holotype); 5—H. rostripenne; 6—H. sulawesianum (holotype); 7—H. bosi sp. nov. (holotype).

FIGURES 8–13. Aedeagus of Hoplasoma (dorsal view at left, lateral view at right). 8—H. apicale; 9—H. celebense; 10—H. paradoxum; 11—H. rostripenne; 12—H. sulawesianum; 13—H. bosi sp. nov. Scale bar 1 mm.

FIGURES 14–24. Details of Hoplasoma. 14–19: male abdomen; 20–23, 25: H. bosi sp. nov.; 24: H. sulawesianum. 14—H. apicale; 15—H. celebense; 16—H. paradoxum; 17—H. rostripenne; 18—H. sulawesianum; 19—H. bosi sp. nov.; 20—male hind tarsus; 21— male middle tarsus; 22— male fore tarsus; 23—spermatheca; 24–25—hind tibia (lateral view). Scale bar 1 mm for Figs. 14–22 and 24–25; 2 mm for Fig. 23.