Penthoscapha similis, Riedel, Alexander, 2009
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publication ID |
https://doi.org/ 10.5281/zenodo.190177 |
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DOI |
https://doi.org/10.5281/zenodo.6226889 |
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persistent identifier |
https://treatment.plazi.org/id/882487F1-4C59-D179-03FD-2E9BFAD8FC9B |
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treatment provided by |
Plazi |
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scientific name |
Penthoscapha similis |
| status |
sp. nov. |
Penthoscapha similis View in CoL sp. n.
( Figs. 12–15 View FIGURES 12 – 15 , 25 View FIGURES 20 – 25 , 27 View FIGURES 26 – 31 , 36 View FIGURES 36 – 38 –39, 55, 57, 59, 61, 64, 66, 72)
Diagnosis. Rostrum relatively long ( Fig. 36 View FIGURES 36 – 38 ). Elytral striae regularly punctate, intervals even, without costae; sutural interval subapically with rounded protrusion ( Fig. 25 View FIGURES 20 – 25 ). Sides of abdominal ventrites and sides of thorax usually with patches of white scales ( Figs. 13, 15 View FIGURES 12 – 15 ). Sides of aedeagus converging from base to pointed apex ( Figs. 37–38 View FIGURES 36 – 38 ).
In the range of P. s i m i l i s sp.n. there occurs a superficially very similar, undescribed species of Gymnopholus . It can be distinguished by its less prominent humeri, by a sparse but distinct vestiture of suberect setae on the elytra, by a deep sublateral groove on the rostrum that terminates in front of the eye, and by the structure of the aedeagus with a simple apical orifice.
Description. Lectotype, male ( Figs. 12–13 View FIGURES 12 – 15 ). Length. Total length 17.5 mm; pronotum + elytron 13.3 mm.
Coloration black; without exocuticular pigments; head and pronotum dorsally subglabrous; elytra except at base sparsely squamose with small green recumbent scales somewhat clustered in elytral punctures, in apical half with sparse rows of suberect setae; sides of thorax and abdomen with patches of white overlapping scales; centre of pterothorax and abdomen black, sparsely setose.
Head with faint lustre, dorsally sparsely setose, especially bordering eyes; between eyes 1.12 X as wide as vertical diameter of eye, punctate-rugose, without median fovea but with median furrow. Vertex with very shallow median furrow. Eyes weakly prominent from outline of head. Gena subequal (1.02 X) to vertical diameter of eye.
Rostrum ( Fig. 36 View FIGURES 36 – 38 ) 2.23 X as long as wide at base; maximum width in front of antennal insertion 1.39 X width at base. Dorsum with distinct median furrow, continuing posteriorly on forehead; sublateral impressions very indistinct, in front of eyes almost effaced.
Antenna. Funicle + club 1.97 X length of scape; club 3.17 X as long as wide.
Thorax. Pronotum ca. as long as wide [1.02 X longer than wide]; sides gently sinuate, widest in apical half; disc densely punctate, coriaceous, dull, with very shallow impression in front of middle. Thoracic venter sparsely setose with thin setae, intercoxal process of mesosternum densely setose, pronotum surrounding procoxa squamose with white scales except prosternum behind coxae densely setose.
Elytron medially free, 4.18 X longer than wide between humeri; at greatest width 1.09 X wider than between humeri; side evenly rounded; dull, coriaceous; striae regular, distinct, moderately impressed; intervals basally weakly transversely confluent, but not forming longitudinal ridges; sutural interval of elytron at apical declivity ( Fig. 25 View FIGURES 20 – 25 ) forming rounded, sparsely setose protrusion visible in lateral aspect. Ala ( Fig. 27 View FIGURES 26 – 31 ) short, length 10.0 mm, 1.41 X length of elytron.
Legs. Femora moderately long, rather stout; metafemur in repose reaching elytral apex. protibia ventrally distinctly denticulate, meso- and metatibia indistinctly denticulate; metatibia apically with sparsely squamose bevel; posterior distal comb of metatibia consisting of simple row of stout setae, without “secondary mucro”. Tarsi moderately long, slightly widened, tarsomere 1 of metatarsus 1.7 X as long as wide, tarsomere 2 0.75 X as long as wide.
Abdomen. Ventrite 1–2 laterally densely squamose with white overlapping lanceolate scales, remainder weakly punctate, sparsely setose; ventrite 5 flat, sparsely squamose-setose, subapically vestiture denser. Genitalia. Aedeagus ( Figs. 37–38 View FIGURES 36 – 38 ) with sides weakly sinuate, converging from base to pointed apex, subapically without constriction. Transfer apparatus (Fig. 39) elongate, ca. 4 X as long as wide at base.
Allotype, female ( Fig. 14–15 View FIGURES 12 – 15 ). Same as holotype except: Length. Total length 22.0 mm; pronotum + elytron 17.0 mm. Rostrum 2.18 X longer than wide at base; maximum width in front of antennal insertion 1.46 X width at base. Antenna. Funicle + club 1.77 X length of scape; club 3.11 X as long as wide. Elytron 4.16 X longer than wide between humeri; at greatest width 1.20 X wider than between humeri. Meso- and metaventrite densely squamose with lanceolate scales. Legs. Femora shorter; metafemur in repose not quite reaching elytral apex. Tarsi not widened, tarsomere 1 of metatarsus 2.0 X as long as wide, tarsomere 2 0.81 X as long as wide. Abdomen. Wing-folding patch of tergite VII ( Fig. 57 View FIGURES 53 – 59 ) distinct. Terminalia. ( Fig. 61 View FIGURES 60 – 66 ). Tergite VIII ( Fig. 66 View FIGURES 60 – 66 ) narrow, sides converging to pointed apex. Sternite VIII ( Fig. 59 View FIGURES 53 – 59 ). Hemisternite ( Fig. 55 View FIGURES 53 – 59 ) 2.3 X as long as high. Stylus 2.8 X as long as wide, subapically with dense cluster of short stiff setae pointing laterad. Spermatheca ( Fig. 64 View FIGURES 60 – 66 ) with gland ca. as long as body.
Intraspecific variation. Length. Total length of males 16.3–19.0 mm (n=7, x =17.1 ± 1.0), females 19.3– 23.0 mm (n=3, x =21.4 ± 1.9); pronotum + elytron of males 12.3–15.0 mm (n=7, x =13.4 ± 0.9), females 15.3–18.0 mm (n=3, x =16.8 ± 1.4). Coloration. Specimens from Eipomek usually with elytral patch of ferruginous scales mesad of humerus; sides of abdomen sparsely setose, without white squamose patches; one specimen from Pronggoli dorsally completely abraded and cuticle of greyish coloration, presumably due to age-related degeneration of exocuticle. Rostrum in males 2.07–2.30 X longer than wide at base (n=7, x =2.16 ± 0.09), in females 1.97–2.18 X longer than wide at base (n=3, x =2.11 ± 0.12); maximum width in front of antennal insertion 1.37–1.57 X width at base (n=10, x =1.43 ± 0.06). Antenna. Funicle + club in males 1.81– 2.02 X length of scape (n=6, x =1.91 ± 0.08), in females 1.72–1.87 X length of scape (n=3, x =1.78 ± 0.08). Elytron in males 3.92–4.22 X longer than wide between humeri (n=7, x =4.10 ± 0.10), at greatest width 1.08– 1.13 X wider than between humeri (n=7, x =1.10 ± 0.02); in females 3.98–4.16 X longer than wide between humeri (n=3, x =4.09 ± 0.10), at greatest width 1.17–1.23 X wider than between humeri (n=3, x =1.20 ± 0.03).
Material examined. Holotype: WEST NEW GUINEA, Jayawijaya Reg., Pronggoli, 2000–2400 m, 17– 19.IX.1991, leg. A.Riedel ( MZB). Paratypes: WEST NEW GUINEA, Jayawijaya Reg.: 2 males, 2 females (1 marked as “allotype”), same data as holotype ( ARC, MZB, SMNK); 2 males, 1 female, Eipomek, 1800– 2300 m, 19.VIII.1992, leg. A.Riedel ( ARC).
Distribution ( Fig. 72 View FIGURES 71 – 72 ). Jayawijaya Reg. (Pronggoli, Eipomek). Elevation: 2000 m.
Biology. Beaten from vegetation along forest edges.
Etymology. This epithet is based on the Latin adjective (feminine nominative) similis (resembling) and refers to the superficial similarity of this species with a sympatric, undescribed species of Gymnopholus .
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.