Psychomyia tripetala, Peng & Wang & Sun, 2020

Peng, Lang, Wang, Bei-Xin & Sun, Chang-Hai, 2020, Four new species of Psychomyia (Trichoptera: Psychomyiidae) from China, with re-descriptions of two species, Zootaxa 4860 (2), pp. 227-242 : 232-235

publication ID	https://doi.org/ 10.11646/zootaxa.4860.2.5
publication LSID	lsid:zoobank.org:pub:24F73335-2E27-4353-8760-7D47E0D19F53
DOI	https://doi.org/10.5281/zenodo.4413723
persistent identifier	https://treatment.plazi.org/id/03ED8785-2D07-B86B-FF08-F9F7FF6DFE2E
treatment provided by	Plazi
scientific name	Psychomyia tripetala
status	sp. nov.

Treatment

Psychomyia tripetala n. sp.

( Fig. 4 View FIGURE 4 a–4e)

Description: Length of each forewing 2.7–3.0 mm (n = 10). Specimens in alcohol with compound eyes black, body brown. Forewings with forks II, III, IV, and V present, crossveins s, r, m-cu zigzagged; hind wings with forks II, III, and V present, fork III short, about 1/4 as long as its stalk, R 1 absent, R 2+3 ending at middle of Sc ( Fig. 7d View FIGURE 7 ).

Male genitalia: Tergum and sternum IX distinctly separated. Tergum IX trilobed in dorsal view (l.l.IX and m.l.IX in Fig. 4c View FIGURE 4 ), lateral lobes trapezoidal with terminal margins slightly concave, median lobes fused with each other, clearly membranous, subrectangular, with distal margin slightly notched mesally; in lateral view (l.l.IX and m.l.IX in Fig. 4a View FIGURE 4 ) median lobe subrectangular, lateral lobes semicircular. Sternum IX subrectangular with triangular process on posterolateral margin in lateral view ( Fig. 4a View FIGURE 4 ), trapezoidal in dorsal view with anterior margin slightly concave. Preanal appendages (pre.app. in Fig. 4a, 4c, 4d View FIGURE 4 ) large, slightly clavate in lateral view ( Fig. 4a View FIGURE 4 ), setose; in dorsal view ( Fig. 4c View FIGURE 4 ) each tapering from 1/5 length to distal end, each inner margin with strong seta subapically; in ventral view ( Fig. 4d View FIGURE 4 ) with mesal surface less sclerotized, setose, and concave in distal 2/3. Coxopodites in lateral view subtriangular (cox. in Fig. 4a View FIGURE 4 ), in ventral view each with basomesal process slender and curved posterad (cox. in Fig. 4d View FIGURE 4 ); harpagones larger than coxopodites, in lateral view (har. in Fig. 4a View FIGURE 4 ) each with narrow base and bifurcate apex, dorsal branch finger-like, ventral branch semicircular; in ventral view (har. in Fig. 4d View FIGURE 4 ) with lateral margins parallel to each other, and ventral branches fused with each other in basal 3/4. Phallic apparatus in lateral view ( Fig. 4a View FIGURE 4 ) having endotheca with basal half cylindrical and distal half expanded, upper margin convex posterodorsally, apicoventral margin produced into finger-like process; pair of long processes arising from base of endotheca (treated as “parameres” here) curved dorsad near base and pointing posterad at mid-length in lateral view, forked into pair of sinuous processes in ventral view.

Diagnosis: The species is unique in Psychomyia in having a trilobed tergum IX and a pair of paramere-like processes. These characters cause difficulty assigning it to any of Schmid’s species groups. However, by these unique two features, this new species can be easily diagnosed from the congeneric members.

Holotype: Male, P. R. China, Jiang-xi Province , Long-nan City, Da-qiu-tian Conservation Station of Jiu-lianshan National Nature Reserve, 24°21′00″N, 114°16′12″E, alt. 377 m, 10 June 2005, leg. L. Yang ( NJAU). GoogleMaps

Paratypes: 14 males, same data as holotype ( NJAU) GoogleMaps .

Distribution: China (Jiang-xi).

Etymology: The Latin adjective tripetalus, - a, - um means “having three petals”, referring to the trifurcate ter- gum IX.