Rhyacophila morsei concaviuscula, Sun, Chang-Hai, 2016
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publication ID |
https://doi.org/ 10.11646/zootaxa.4072.4.3 |
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publication LSID |
lsid:zoobank.org:pub:A31B56DC-EC3F-4A0C-8FF9-F05657EA4365 |
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DOI |
https://doi.org/10.5281/zenodo.6062583 |
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persistent identifier |
https://treatment.plazi.org/id/D71487A1-7E6E-5D46-FF73-32828944973C |
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treatment provided by |
Plazi |
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scientific name |
Rhyacophila morsei concaviuscula |
| status |
subsp. nov. |
Rhyacophila morsei concaviuscula n. ssp.
Figs. 5 View FIGURE 5 A–E
Length of each forewing 8.0 mm. Body (in alcohol) yellowish brown. Head yellowish brown; antennae yellow, palpi brown. Thorax yellowish brown dorsally and light brown laterally and ventrally; legs yellowish brown, spurs dark brown; wings light brown. Abdomen dark brown dorsally and yellowish brown ventrally.
Male genitalia. Segment IX (IX) with upper portion longer than its lower portion in lateral view ( Fig. 5 View FIGURE 5 A), upper margins slightly sinuate, each anterior margin almost straight with shallow incision in lower part, upper half of posterior margin straight and lower half shallowly incised; trapezoidal in dorsal view ( Fig. 5 View FIGURE 5 B), with its anterior margin slightly concave, posterior margin irregularly convex, wider than long. Segment X in dorsal view subrectangular ( Fig. 5 View FIGURE 5 B), apex shallowly incised; upper portion (u.p.) large, shallowly biconcave anterodorsally and posteriorly in lateral view ( Fig. 5 View FIGURE 5 A), somewhat saddle-like, dorsal margin sinuate, posteroventral angles produced into pair of small lobes; lower portion (l.p.) vertical, slender in lateral and caudal views ( Figs. 5 View FIGURE 5 A, 5C, 5D), with pair of small subapical lobes, lower margins shallowly concave in caudal view. Anal sclerites (a.s.) small, button-like, with long roots (r.). Apical band (u.) irregular in lateral view ( Fig. 5 View FIGURE 5 D), pentagonal in caudal view with lateral arms curved ( Fig. 5 View FIGURE 5 C). Tergal strap (t.s.) in lateral view triangular ( Fig. 5 View FIGURE 5 D), with its base fine and progressively enlarged to distal end. First joint of each inferior appendage trapezoidal, dorsal margin about half as long as ventral margin, distal margin straight in lateral view ( Fig. 5 View FIGURE 5 A); second joint separated into two branches with equal width and rounded apices in lateral view. Phallic apparatus complicated: Phallotheca (pht.) rectangular; dorsal process (d.p.) and aedeagus (aed.) in lateral view ( Fig. 5 View FIGURE 5 D) tube-like and equal in length and width, in dorsal view dorsal process progressively wider from base to distal end; ventral plate of aedeagus trifurcate, with middle lobe (m.l.) broad and apically truncate, pair of lateral lobes (l.l.) pointed and slightly shorter than middle lobe. Paramere (par.) large, its base membranous, distal half in lateral view somewhat elliptical, with dense fringe of setae apically.
Holotype. Male: CHINA: Gui-zhou Province, Chi-shui city, Hu-shi town, Nan-zhu-lin-fang subdivision, Jinsha-gou work area, Gan-gou, 28.4734°N, 106.0056°E, elev. 460 m, 9 June 1995, collected by WANG Bei-xin and SUN Chang-hai.
Diagnosis. The male genitalia of the new subspecies are very similar to those of the more northern R. morsei morsei , but differ from the latter in that (1) the upper portion of segment X in lateral view has its dorsal margin slightly sinuate (almost straight in R. morsei morsei ); (2) the upper portion of segment X in dorsal view is as wide as long (obviously wider than long in R. morsei morsei ).
Etymology. The specific epithet is the Latin word concaviusculus, meaning “slightly concave” in reference to the upper portion of segment X with a shallow concavity in lateral view.
Distribution. China (Gui-zhou).
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.