Himalopsyche viteceki, Hjalmarsson, 2019

Hjalmarsson, Anna E., 2019, Delimitation and description of three new species of Himalopsyche (Trichoptera: Rhyacophilidae) from the Hengduan Mountains, China, Zootaxa 4638 (3), pp. 419-441 : 425-426

Himalopsyche viteceki sp. nov.

Figures 2 A–2E, 3A–3C

Material examined. Holotype. 1 male: China, Yunnan, Diqing Tibetan Autonomous Prefecture, Dêqên County, Yakou , Baima Snow Mountain , 28°18.09’N, 99°8.60’E, ca 3430 m asl; leg. Chen, Hjalmarsson , Li , 30.vii.2013. Deposited in Senckenberg Research Institute , Frankfurt am Main , Germany. BOLD Process ID SPHIM410-17 , Field ID AH0683, Museum ID SMFTRI00017216.

Paratypes. 4 males, 2 females: Same collection data as holotype. Deposited in Senckenberg Research Institute , Frankfurt am Main, Germany (SMFTRI00017215, SMFTRI00018190, SMFTRI00018191, SMFTRI00017212, SMFTRI00017213) and Senckenberg Deutsches Entomologisches Institut, Müncheberg , Germany (SMFTRI00018192) . 1 female: Myanmar , Kachin Hills, leg. S. Naumann, 3.x.2010. Stored in Museum für Naturkunde, Berlin, Germany .

Diagnosis. Males of the new species are most similar to those of H. alticola , H. martynovi , and H. immodesta sp. nov., but (1) superior appendages each without a distinct incision between mesal and lateral lobes (with a distinct incision in H. alticola , H. martynovi , and H. immodesta sp. nov.); (2) the ventrocaudal margin of the lateral lobe of each superior appendage is straight with a mesal triangular protrusion (concave in H. alticola , pointed in H. martynovi ); (3) the mesodorsal margin of each superior appendage has an oval tip lacking a ventral triangular protrusion (oval tip with ventral triangular protrusion in H. immodesta sp. nov.); (4) the tip of the distal segment of each inferior appendage is subrhombic and projecting mesodorsad in an obtuse angle (the tip of the distal segment is suboval in H. martynovi and subrhombic, but projecting perpendicularly mesodorsad in H. immodesta sp. nov.). Females of the new species are most similar to H. tibetana and H. velata sp. nov., but (1) in lateral view, segments IX and X seemingly are fused, with IX forming lateral tongue-like sclerites projecting ventrad (IX triangular in H. tibetana , IX completely fused with X in H. velata sp. nov.); (2) in ventral view, the center of the ventral margin is elevated and forming a narrow, finger-like ventromesal process (elevated and forming a triangular protrusion in H. tibetana and H. velata ); (3) the posterior margin of VIII has a posterior lobe in the ventral portion (posterior margin of VIII without such lobe in H. tibetana and H. velata ); (4) segment VIII in lateral view has a ventromesal protuberance in the caudal portion (without a ventromesal protuberance in H. tibetana and H. velata ); (5) the ventromesal lobes are short, stout, and projecting dorsad (ventromesal lobes elongate and finger-like in H. velata ).

Description. Adults. Habitus (in alcohol) dark; sternites beige, tergites dark; legs beige with dark stripes. Wings with dark pattern and dark setae on veins. Male maxillary palps each 5-segmented, spur formula 3-4-4. Length of each forewing in males 18–20 mm, in females 22–24 mm.

Male genitalia ( Figure 2 ). Segment IX dorsally longer than ventrally and seemingly fused with tergum X; in dorsal view anteriorly concave, lateral margins slightly convex, caudally with pair of shallow mesolateral incisions at base of processes of tergum X ( Figure 2D ); segment IX in lateral view dorsally slightly convex, caudal margin dorsal portion straight with distinct small dorsal indentation at base of tergum X and ventral portion deeply incised (2/3 of segment length) at insertions of inferior appendages ( Figure 2A ); in ventral view anteriorly straight with two shallow sublateral indentations, caudally obtusely convex ( Figure 2E ). Tergum X with deep mesal incision forming two parallel ridges; in dorsal view elongate subtriangular with deep mesal incision ( Figure 2D ); in lateral view projecting dorsad in oblique angle from segment IX, dorsal margin convex and connected with anal sclerites and superior appendages by membranous structure ( Figure 2A ). Anal sclerites not fused ( Figure 2D ); in lateral view sinuous, hooked ventrad apically ( Figure 2A ). Superior appendages complex, each laterally compressed and in lateral view planar, indistinctly bilobed, approximately as long as inferior appendages ( Figure 2A ); their mesodorsal lobes in lateral view each evenly curved with oval tip and projecting caudoventrad, in dorsal view digitate ( Figures 2A, 2D ); each lateral lobe laterally compressed and planar, its dorsal margin fused with mesodorsal lobe, in lateral view with dorsocaudal margin concave, ventrocaudal margin straight with mesal triangular protrusion, ventral margin straight with very indistinct concavity ( Figure 2A ), in dorsal and ventral views with triangular subterminal protrusion projecting mesad ( Figures 2D, 2E ). Inferior appendages each 2-segmented: Basal segment bilobed, mesodorsal lobe in lateral view acute-oval with subterminal ventral indentation, lateroventral lobe digitiform; distal segment dorsally longer than ventrally, tip of distal segment in lateral view subrhombic, projecting mesodorsad with fine dense thorns on mesal face ( Figure 2A ). Aedeagus positioned dorsally and on left side of paramere, sinuous, wider at base, tapering towards apex, apex projecting ventromesad; in lateral view sinuous, apex projecting ventrad with small opening on ventral face of apex; in ventral view wide with distinct angle at 2/3 of its length, caudal third pipe-shaped, curving mesad, with opening semi-circular ( Figures 2B, 2C ). Paramere spinose, somewhat shorter than aedeagus, in ventral view with rounded base ( Figures 2B, 2C ).

Female genitalia ( Figure 3 ). Segment VIII synsclerous, not divided into tergite and sternite, in dorsal view anteriorly broader than caudally, anterior margin straight, lateral corners with protrusions, lateral margins straight, oblique, caudal margin broadly incised and with rounded lateral corners ( Figure 3B ); in lateral view dorsal margin straight, caudal margin with dorsal portion rounded, mesal portion straight, and ventral portion forming lobes projecting caudad and connected to pair of strong ventromesal lobes projecting caudad and covered with fine pubescent hair, ventromesal process ventral to the ventromesal lobes and projecting dorsocaudad from segment VIII, about half as long as ventromesal lobes and with long, thick setae, ventral margin of VIII in lateral view straight, oblique, with mesal protuberance in caudal portion ( Figure 3A ); segment VIII in ventral view anterior margin slightly convex with two pairs of sublateral anterior protrusions, lateral margins straight and sweeping inward caudally, caudal margin with deep incisions between ventrolateral lobes and ventromesal lobes, ventrolateral lobes in ventral view narrow and projecting mesocaudad, ventromesal lobes digitiform and projecting laterocaudad, ventromesal process digitiform and 1/3 as long as ventromesal lobes ( Figure 3C ). Ventromesal lobes thick and covered with very short, pubescent hair, in lateral view dorsal margins convex, ventral margins concave, in ventral view finger-like and projecting caudolaterad ( Figure 3A ). Segment IX indistinct, lightly sclerotized and dorsally fused with segment X, in lateral view tongue-shaped and projecting slightly ventrad ( Figures 3A, 3B ). Segment X membranous with distinct pair of sclerotized patches dorsmesally, and pair of smaller sclerotized patches basolateral of the larger pair ( Figures 3A, 3B ); dorsal lobes each with small pair of cerci projecting caudad ( Figures 3 A–C). Apodemes extending from segment X through segment VIII, extending anterad ( Figures 3A, 3B ). Bursa copulatrix as pictured with dotted outline in dorsal and lateral views ( Figures 3A, 3B ).

Etymology. Named for Simon Vitecek, entomologist.

Distribution. China (Yunnan); Myanmar ( Figure 8A ).

Figures

FIGURE 2. Male genitalia of Himalopsyche viteceki sp. n. 2A, left lateral; 2B, phallic apparatus, left lateral; 2C, phallic apparatus, ventral; 2D, dorsal; 2E, ventral. Abbreviations: IX = abdominal segment IX; X = tergum X; a.s. = anal sclerite; s.a. = superior appendages; i.a. = inferior appendages; a. = aedeagus; p. = paramere.

FIGURE 3. Female genitalia of Himalopsyche viteceki sp. n. 3A, left lateral; 3B, dorsal; 3C, ventral. Abbreviations: VIII = abdominal segment VIII; IX = tergum IX; X = tergum X; b.c. = bursa copulatrix; vm.p. = ventromesal process of segment VIII.

FIGURE 8. Maps of Himalopsyche spp. localities. 8A, type localities of Himalopsyche viteceki sp. n., H. immodesta sp. n., and H. velata sp.n.; 8B, sampling localities of specimens belonging to the H. martynovi-Complex and H. epikur.