Stenus alpigenus, Shuai & Tang & Luo, 2020
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publication ID |
https://doi.org/ 10.37520/aemnp.2020.043 |
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publication LSID |
lsid:zoobank.org:pub:33D1CD77-7BC6-4083-8FD7-8F7DDAE309A6 |
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persistent identifier |
https://treatment.plazi.org/id/03E34929-645A-FF93-DB95-F8AFFE019191 |
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treatment provided by |
Carolina |
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scientific name |
Stenus alpigenus |
| status |
sp. nov. |
Stenus alpigenus View in CoL sp. nov.
( Figs 10 View Figs 6–10 , 42–45 View Figs 42–45 )
Type material. Hඈඅඈඍඒඉൾ: CHINA: Yඎඇඇൺඇ: J, glued on a card with labels as follows: “Zhongdian Co., 55km N Zhongdian, 28°19.8’N, 99°45.7’E, 3800m, primary mixed forest, Rhodod, dead wood, mushrooms, moss, 18.viii.2003, M. Schülke leg.”, “ Holotype / Stenus alpigenus / Shuai, Tang & Luo” [red handwritten label] ( MSBG). Pൺඋൺඍඒඉൾඌ: CHINA: Yඎඇඇൺඇ: 2 JJ 2 ♀♀, same label data as for the holotype ( MSBG, SHNU).
Differential diagnosis. The new species resembles S. tenuidentatus sp. nov. and S. platydentatus sp. nov. from Yunnan but can be distinguished from both by narrower apical sclerotized area of aedeagal median lobe ( Fig. 43 View Figs 42–45 ) and less coiled spermatheca duct ( Fig. 45 View Figs 42–45 ).
Description. Measurements. BL: 3.4–4.4 mm, FL: 1.8–2.2 mm. HW: 0.81–0.90 mm, PL: 0.61–0.71 mm, PW: 0.64–0.76 mm, EL: 0.65–0.82 mm, EW: 0.78–0.97 mm, SL: 0.52–0.65 mm. Head 0.92–1.04 times as wide as elytra; pronotum 0.94–0.98 times as long as wide; elytra 0.84–0.88 times as long as wide.
Morphology. The species is similar to Stenus mendaensis sp. nov. in most aspects except for the following characters: head with interstices smooth, interstices along midline of convex portion slightly larger than half the diameters; elytral punctation more confluent; abdominal tergites with punctation slightly coarser, tergites III–VII with interstices smooth.
Male. Mesotibiae and metatibiae each with tooth on inner side of apex; sternite VIII with triangular emargination in middle of posterior margin;sternite IX ( Fig. 44 View Figs 42–45 ) with distinct apicolateral projections, posterior margin serrate.Aedeagus ( Figs 42, 43 View Figs 42–45 ) slender; apical sclerotized area of median lobe relatively long and pointed at tip; expulsion clasps relatively stout, strongly sclerotized; copulatory tube long and broad; parameres much longer than median lobe, swollen in apical parts, each with two groups of setae on apico-internal margins: 14–15 setae in distal and 5–7 setae in basal group.
Female. Sternite VIII prominent in middle of posterior margin; spermatheca ( Fig. 45 View Figs 42–45 ) sclerotized, basal porch emarginated on apical margin, spermatheca duct stout, coiled at first bend, capsule small.
Etymology. The specific name is derived from the high altitude of the type locality; adjective.
Distribution. China (Yunnan).
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.