Lepidostoma indivisum, Mey & Malicky, 2021

Mey, Wolfram & Malicky, Hans, 2021, Caddisflies from Myanmar: New records and descriptions of new species (Insecta, Trichoptera), Zootaxa 5060 (4), pp. 533-565 : 541

Lepidostoma indivisum spec. nov.

( Figs 6A–6E )

LSID urn:lsid:zoobank.org:act:44FC8761-C784-4915-94D3-D8CFEBFECA10

Holotype ♂ (pinned), Myanmar, Kachin, Kanphant , 40 km north, 3 km east of three-river-junction, 2450 m, 26°23’12.7”N 98°39’36.6”E, 3.x.2010, leg. S. Naumann, genitalia in glycerine vial ( MfN).

Etymology. The specific name is the Latin adjective “ indivisum, “undivided,” referring to the undivided, simple form of segment X of the male genitalia.

Diagnosis. Considering the male genitalia, the new species resembles L. kjeri Parey & Pandher 2019 recently described from Arunachal Pradesh, India. The scapes and maxillary palpi are of different form. In the forewing venation, the discoidal cell is longer than its stalk, and the anal field is much narrower than in L. kjeri.

Description. Length of each forewing 8.5 mm. Head grey-brown, setal warts with long black bristles and short, grey, scale-like hairs, frons smooth, with median depression; scapes without processes, bearing long, black bristles, short scale-like hairs and small hairs, flagellomeres yellow. Terminal segments of maxillary palpi with apical brush of black, androconial hairs ( Fig. 6D ), labial palpi yellow-brown. Thorax dark brown dorsally, legs yellow-brown, spurs 2.4.4. Forewings grey-brown, covered by short scale-like hairs and black hairs on membrane and veins, base of costa with hair comb ( Fig. 6E ); wing venation in fig.

Male genitalia ( Figs 6A–6C ). Segment X simple and symmetrical, with main process broad, irregularly square, having length and height nearly equal in lateral view. First article of each inferior appendage with short, ventral extension at apex best seen in ventral view, basodorsal process clavate and curved dorsocaudad; second article clavate in dorsal/ventral views. Phallic apparatus with aedeagus strongly recurved at base, parameres symmetrical, apical portions curved caudoventrad.

Figures

FIGURES 5, 6. Myanmar Trichoptera spp. 5A–5E, Lepidostoma pennicularium spec. nov., scale = 0.5 mm: 5A, genitalia, left lateral; 5B, genitalia, ventral; 5C, genitalia, dorsal; 5D, head, left lateral; 5E, right forewing venation, dorsal.