Stenus bistigmosus, Puthz, 2011
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publication ID |
https://doi.org/ 10.5281/zenodo.5324778 |
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persistent identifier |
https://treatment.plazi.org/id/EB098780-5A1B-3822-9292-9461FEA9C2EC |
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treatment provided by |
Carolina |
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scientific name |
Stenus bistigmosus |
| status |
sp. nov. |
Stenus bistigmosus View in CoL nov.sp. ( Figs 43 View Figs 26-45 , 69 View Figs 46-69 , 84, 86 View Figs 70-88 , 93 View Figs 89-107 )
T y p e m a t e r i a l: Holotype: TAIWAN: Taichung Hsien: Hsuehshan near Hsuehshan-Tun- Feng , 3170 m, 11.V.1991, leg. A SMETANA (T 76) . Paratypes: 1: Kaohsiung Hsien: Kuanshan, Kuanoshing Hut , 3020 m, 18.IV.1992, leg. A. SMETANA (T 92) ; 1: Kaohsiung Hsien: Peinantashan trail, 2500 m, 4.VII.1993, leg. A. SMETANA (T 136).- HT and 1 PT in coll. Smetana (Ottawa), 1 PT in cP .
D e s c r i p t i o n: Macropterous, black, slightly shiny, each elytron with a large, oval, orange spot in posterior half (fig. 43); punctuation of the forebody very coarse and very dense, on pronotum and elytra confluent, abdominal punctuation coarse and moderately dense anteriorly to fine and moderately sparse posteriorly; pubescence short, recumbent. Antennae brown, club infuscate. Maxillary palpi yellowish, segment 3 infuscate. Paraglossae coniform. Legs reddish brown, nearly the apical half of the femora and the apices of tarsal segments infuscate. Clypeus black, labrum black, anterior margin brown, moderately densely pubescent.
Length: 6.3-7.3 mm (forebody: 3.2 mm).
PM of the HT: HW: 55; DE: 30; PW: 40.5; PL: 46; EW: 50; EL: 56; SL: 44; SpL: 24.
M a l e: Very similar to S. bilunatus , but the apical notch of sternite 8 less deep (41.5: 2), apicolateral teeth of sternite 9 shorter (fig.86). Anterior portion of the median lobe different (fig. 69), expulsion clasp narrower and differently shaped anteriorly (figs 84, 93).
F e m a l e: Similar to that of S. bilunatus .
C o m p a r a t i v e n o t e s In many respects closely resembling S. bilunatus , but the head distinctly broader than elytra, the elytral spot much larger, and the abdominal punctuation less coarse and distinctly sparser: on tergite 4 interstices on the average slightly larger than punctures, in tergite 7 punctures are smaller than eye facets near dorsal eye margins, interstices much larger (becoming twice and more as large) than punctures.
Variability: In the paratype from the Peinantashan trail nearly the whole elytra are darkorange.
E t y m o l o g y:" bistigmosus " (Lat.) = with two (orange) stigmata.
For identification amongst the Taiwanese species see key.
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