Trichotichnus fedorenkoi Kataev & Hongbin & Wrase 2022, sp. n.

Trichotichnus (s. str.) fedorenkoi sp. n.

(Figs. 37, 68–73)

Type material. Holotype. Male, “N-Vietnam, 40 km W of Cao Bang Phia Oac Mt. 22°36′25′′N / 105°52′08′′E / h ~ 1650–1700 m, deciduous forest, 3–11.X.2018 leg. D. Fedorenko ” (ZIN).

Paratypes. Vietnam. CAO BANG: 1 female, same data as holotype (SIEE); 1 male, “N-VIETNAM, Cao Bang Prov. / vic. Tinh Tuc, Son Dong Nui / Pia Oac Nature Res., 850–1300 m, 09.–15.V.2014 / 22°37′55′′N, 105°52′98′′E / leg. A. Weigel by light” (NME). VINH PHUC: 1 male, N-Vietnam, Vinh Phuc Pr., vic. Tam Dao Town, Tam Dao NP, 700–1000 m, 21°27′N 105°38′E, 2–5.V.2013, A. Weigel leg. (NME); 1 female, Mts near Tam-Dao, 900 m, 2.XI.1962, O. Kabakov leg. (ZIN); LAO CAI: 1 female, Lao Cai Prov., near Cat Cat Vill., 2.5 km SW of Sa Pa, 22°19′37′′N 103°49′21′′E, 1400–1450 m, V. 2010, A.V. Abramov leg. (ZIN). NINH BINH: 1 female, Vietnam, N, Ninh Binh Pr., 90 km SW Hanoi, Cuc Phuong NP, primat rescue centre, 190 m, 20°14′24′′N 105°42′53′′E, at light, 25.IV.2012, A. Weigel leg. (NME).

Description. Habitus as in Fig. 37. Morphological character states are as described for T. schmidti sp. n., but differing as follows.

Body larger (length 8.5–9.1 mm). Dorsal microsculpture highly obliterated, meshes on head almost not recognized. Mesotarsomere 3 in male more elongate, in most specimens longer than wide. Last abdominal sternite (VII) in both sexes rounded at apex.

Median lobe of aedeagus (Figs. 68–70) in lateral view slightly arcuate, with almost straight apical half; apex thin, hooked ventrally; in dorsal view median lobe comparatively wide basally, evenly narrowed apically, with terminal lamella (Fig. 68) about as wide as long, roundly narrowed at apex. Ventral side edged laterally and slightly depressed between margins. Apical orifice in dorsal position, wide apically. Internal sac with a large curved spiny patch apically, narrowed to base.

. Female genitalia (Figs. 71 & 72): gonocoxite comparatively narrow in ventral view, about 0.6 times as long as gonosubcoxite, with relatively narrower base.

Proportions (2 males and 3 females measured): HWmax/PWmax 0.69–0.73; HWmin/PWmax 0.52–0.57; HWmax/HWmin 1.27–1.32; PWmax/PL 1.53–1.57; PWmax/PWmin 1.21–1.28; EL/EW 1.52–1.60; EL/PL 2.92–3.19; EW/PWmax 1.27–1.33.

Etymology. The species is named after our friend and colleague Dmitry Fedorenko (Moscow), an excellent carabidologist, who collected a part of the type series.

Distribution (Fig. 73). Known from North Vietnam (Lao Cai, Cao Bang, Vinh Phuc and Ninh Binh provinces) where it occurs at altitudes of about 190–1700 m.