Gymnopholus (Niphetoscapha) wichmanni (Heller)

Riedel, Alexander & Kilmaskossu, Agust, 2017, Revision of the subgenus Niphetoscapha Heller of Gymnopholus Heller (Coleoptera, Curculionoidea, Entiminae, Eupholini) and a new species with epizoic symbiosis from West New Guinea, Zootaxa 4254 (3), pp. 339-356 : 353-354

Gymnopholus (Niphetoscapha) wichmanni (Heller)

( Figs. 7–8 , 12 , 16 , 19 , 24 , 37–38 , 41 )

Rhinoscapha (Niphetoscapha) wichmanni Heller, 1914: 645 (type locality: Hellwig Mountains ).

Diagnosis. Pronotum nude, weakly punctate, without distinct granules. Elytral intervals 4–6 with longitudinal impression; longitudinal impressions and subapical portion sparsely squamose.

Redescription. Paralectotype, male ( Fig. 7 ). Length. Total length 25.0 mm; pronotum + elytron 20.0 mm.

Color dull black, portions of head, pronotum and base of elytra greyish due to age related degradation of cuticle; antennal scape and funicle ferruginous; elytra partly with brownish encrustations presumably consisting of algae or lichens, especially in apical half and in basal portion of longitudinal impressions; venter almost nude, with sparse setae.

Head ( Fig. 12 ) dull, dorsally nude, with sparse coarse punctures, laterally coriaceous, sparsely setose with short recumbent setae; between eyes 1.05 X as wide as vertical diameter of eye. Eyes moderately prominent from outline of head. Gena 1.22 X as long as vertical diameter of eye.

Rostrum ( Fig. 12 ) 2.54 X longer than wide at base; maximum width in front of antennal insertion 1.46 X width at base. Dorsum with shallow median impression, without dorsolateral furrows; sparsely punctate with coarse punctures, nude, but presumably scales abraded.

Antenna. Funicle + club 1.64 X length of scape; club 3.55 X as long as wide.

Thorax. Pronotum 1.13 X longer than wide; sides gently sinuate, widest in apical half; disc dull, punctulate, with larger interspersed punctures, without wrinkles or denticles, nude; with shallow median impression, most distinct in apical half. Thoracic venter. Metanepisternite anteriorly with white recumbent scales. Mesoventrite granulate-punctate, with long erect setae; metaventrite sparsely denticulate, sparsely setose with suberect setae not concealing surface.

Elytron 4.53 X longer than wide between humeri; at greatest width 1.18 X wider than between humeri; sides subparallel, weakly rounded; surface dull, coriaceous, without transverse wrinkles; medially dorsally flattened, in basal half intervals 4–6 with longitudinal impression; epipleural edge simple, without fringe of setae; apical declivity at suture with blunt knob, further ventrad with pair of sublateral knobs.

Legs. Surface dull, punctulate, with numerous granules, with sparse suberect setae. Femora moderately long; metafemur in repose not reaching elytral apex.

Abdomen. Ventrite 1–2 medially concave, weakly punctate, sparsely setose; ventrite 5 flat, subapically with densely setose patch. Penis ( Fig. 24 ) with asymmetrical apical tip moderately wide.

Lectotype, female ( Fig. 8 ). Same as paralectotype except: Length. Total length 29.0 mm; pronotum + elytron 25.0 mm. Color black, without grey areas of degraded cuticle; integument partly covered with brownish scales and encrustations. Head between eyes 1.07 X as wide as vertical diameter of eye. Rostrum ( Fig. 12 ) 2.56 X longer than wide at base; maximum width in front of antennal insertion 1.44 X width at base. Dorsum with shallow median impression, in basal half with pair of weak dorsolateral furrows; laterally with sparse erect scales, antennal scrobes clothed with scales and brown encrustations. Antenna. Funicle + club 1.63 X length of scape; club 3.15 X as long as wide. Thorax. Pronotum 1.05 X longer than wide. Elytron 4.28 X longer than wide between humeri; at greatest width 1.20 X wider than between humeri; side moderately rounded; surface markedly coriaceous; apex and longitudinal impressions of intervals 4–6 with dense recumbent scales, sparsely interspersed with short erect scales, with brownish encrustations; knobs at apical declivity ( Fig. 19 ) more distinct, forming horseshoe-shaped swelling. Abdomen. Ventrite 1–2 convex, medially flat; ventrite 5 subglabrous, sparsely setose.

Material examined. Lectotype (here designated), female: labels ( Fig. 37 ): 1) [white, rectangular]: “Z. NieuwGuinea, Lorentz 1909-10 [printed], Hellwig Gebergte, 2500 M, XI.09 [handwritten]”, 2) [blue, small, quadrate] “1912 [printed], 6 [handwritten]”, 3) [red, rectangular] “Typus! [printed], wichmanni H. [handwritten on reverse side]“, 4) [white, rectangular] “Staatl. Museum für Tierkunde Desden [printed]”, 5) [red, rectangular] “LECTOTYPE, Gymnopholus (Niphetoscapha) wichmanni (Heller) , det. A. Riedel 2014 [printed]”; condition: fair; right antennal club broken and missing; 5 eggs found in abdomen and glued to card; genitalia in glycerol, in microvial attached to pin (SMTD); paralectotype, male: labels ( Fig. 38 ): 1) [white, rectangular]: “Z. NieuwGuinea, Lorentz 1909-10 [printed], Hellwig Gebergte, 2500 M, XI.09 [handwritten]”, 2) [blue, small, quadrate] “1912 [printed], 6 [handwritten]”, 3) [red, rectangular] “Cotypus [handwritten] “, 4) [white, rectangular] “Staatl. Museum für Tierkunde Dresden [printed]”, 5) [red, rectangular] “PARALECTOTYPE, Gymnopholus (Niphetoscapha) wichmanni (Heller) , det. A. Riedel 2014 [printed]”; condition: fair; specimen abraded and showing age-related degeneration of cuticle; genitalia glued to card (SMTD).

Distribution ( Fig. 41 ). To date only known from the type specimens. Based on the data from the map given by Nouhuys (1914) and Google Earth the approximate coordinates of the type locality are E 138°43.963´S 4° 30.952´, about 25 km linear distance south of Mt. Trikora.

Notes. The two syntypes at hand differ somewhat morphologically. Heller (1914) did not mention the total number of specimens, so other syntypes may exist. He marked the female as “type”, the male as “cotype” but he did not mention these terms in the original publication. To ensure stability of nomenclature the female marked by Heller as “type” is here designated as lectotype.

Figures

FIGURE 41. Distribution of G. (Niphetoscapha) wichmanni and G. (Niphetoscapha) inexspectatus sp. n.. Base map created with GeoMapApp (http: // www. geomapapp. org).

FIGURES 5 – 8. Habitus of Gymnopholus (Niphetoscapha) spp., dorsal aspect: (5) G. inexspectatus sp. n., holotype; (6) G. inexspectatus sp. n., allotype; (7) G. wichmanni, paralectotype, male; (8) G. wichmanni, lectotype, female.

FIGURES 9 – 12. Head and rostrum of Gymnopholus (Niphetoscapha) spp.: (9) G. audax; (10) G. nitidus; (11) G. inexspectatus sp. n., holotype; (12) G. wichmanni, lectotype.

FIGURES 13 – 16. Pronotum of Gymnopholus (Niphetoscapha) spp., female: (13) G. audax (14) G. nitidus; (15) G. inexspectatus sp. n., allotype; (16) G. wichmanni, lectotype.

FIGURES 17 – 20. Elytral apex of Gymnopholus (Niphetoscapha) spp., female; in dorsoapical aspect (left), in profile (right): (17) G. audax; (18) G. nitidus; (19) G. wichmanni, lectotype; (20) G. inexspectatus sp. n., allotype.

FIGURES 21 – 24. Gymnopholus (Niphetoscapha) spp.; Male genitalia; body of penis in dorsal aspect (left), in profile (right): (21) G. audax; (22) G. nitidus; (23) G. inexspectatus sp. n., holotype; (24) G. wichmanni, paralectotype.

FIGURES 33 – 38. Gymnopholus spp.: (33) Transfer apparatus of G. inexspectatus sp. n., holotype; (34) Transfer apparatus of G. nitidus; (35) Left wing of G. (Symbiopholus) lichenifer; (36) Left wing of G. (Niphetoscapha) inexspectatus sp. n., allotype; (37) labels of G. wichmanni, lectotype; (38) labels of G. wichmanni, paralectotype.