Pterostichus (Tausternus) hoii, Fedorenko, 2020

Fedorenko, D. N., 2020, New taxa of Pterostichini (Coleoptera: Carabidae) from Vietnam, Russian Entomological Journal 29 (1), pp. 38-52 : 41

Pterostichus (Tausternus) hoii Fedorenko, sp.n.

Figs 1–13 .

MATERIAL. Holotype ♂ and two paratypes ♀♀ ( ZISP), labelled: ‘ Vietnam, Kon Tum Prov [ince]., Central Highlands , 2–3 km W of Ngoc Linh Mt., 15°05´N, 107°57´E, 1700–1900 m, 25.III– 14.IV.2004, A.V. Abramov’; two paratypes, ♂ ♀ ( SIEE) from the same exact locality, with label ‘ Vietnam, Kon Tum Prov., 2–3 km W of Ngoc Linh Mt., 15°05´N, 107°57´E, h= 1600–2150 m, pitfall traps, 19.III–IV.2006, leg. A.Anichkin’.

DESCRIPTION. As for the subgenus. Additional features: Dorsal microsculpture distinct, consisting of isodiametric meshes over head and elytra, and of small, slightly transverse meshes over pronotum.

Head: Genae distinctly longer than eyes, adjoining neck at very obtuse angle. Frontal foveae slightly diverging and deepened to the level of anterior margin of eye, then in form of oblong, wide and deep, foveae converging to and barely surpassing the level of posterior margin of eye; anteriorly extended onto clypeus into divergent shallow impressions. A superficial median V- or Y-shaped line between frontal foveae. Labrum rectangular, slightly transverse, sexsetose, apex more or less emarginate in form of a wide V.

Pronotum varying slightly in shape following sides ranging from slightly and evenly rounded in apical two thirds and subsinuate behind, with a subtle convexity near posterolateral seta, to nearly parallel in apical three fifths and then converging toward and sinuate a fifth from base. Median line fine yet deep, mostly reaching base and obliterate rather far from apex. Inner basal sulcus extended apicad into a very shallow line running parallel to lateral margin and disappearing a fifth from apex. PW / PL 1.03– 1.09 (1.05, n=5), PW / HW 1.33 – 1.39 (1.36), PB/ PA 0.90–0.94 (0.90, n=4), PLw/ PL 0.36–0.40 (0.38); in a female paratype ( Fig. 4 ), PB/PA 0.82, PLw/ PL 0.53.

Elytra broadest at or slightly behind middle, EL/EW 1.60–1.69 (1.64, n=5), EW/ PW 1.16–1.23 (1.19). Striae deep impunctate or indistinctly crenulate. Intervals convex, 1st joining lateral bead at sutural angle; 7 th, 5 th, and 3 rd confluent preapically in succession. Parascutellar seta distant rather far from the site of basal ridge.

Underside vaguely and sparsely punctate across mesoventrite; sometimes extreme sides of metaventrite and/or metepisternum, or propleura, or abdominal sternite III with a similar punctation.

Aedeagus ( Figs 10–13 ): median lobe strongly curved at base, ventral margin with a large blunt tooth; apex moderately long, triangular in lateral view, rounded in dorsal view. Left paramere characteristic of Pterostichus , right paramere short, apically triangular and bulbous.

NAME. Patronymic, given after my good friend and colleague, Vietnamese geographer Dr. Nguen Dang Hoi.

Figures

Figs 1–9. Pterostichus (Tausternus) hoii sp.n.: 1 — habitus of paratype ♀; 2, 3 — head and pronotum; 4 — variant form of pronotum; 5 — body apex; 6–9 — left metatibia of male (6, 8) and female (7, 9); 1, 4 — dorsal aspect; 2 — ventral aspect; 3, 5, 8–9 — left lateral aspect; 6–7 — caudal aspect. Рис. 1–9. Pterostichus (Tausternus) hoii sp.n.: 1 — габитус дорЗально, паратип ♀; 2, 3 — голова и переднеспинка; 4 — вариант формы переднеспинки; 5 — верШина тела; 6–9 — ЗаднЯЯ леваЯ голень самца (6, 8) и самки (7, 9); 1, 4 — дорЗально; 2 — вентрально; 3, 5, 8–9 — слева; 6–7 — каудально.

Figs 10–13. Pterostichus (Tausternus) hoii sp.n.: 10–11 — median lobe of aedeagus; 12 — right paramere; 13 — female genitalia and reproductive tract (spermathecal gland and major part of spermatheca removed), ventral aspect; 10 — left lateral aspect; 11 — dorsal aspect; bc — bursa copulatrix; gsc — gonosubcoxite; LTIX — laterotergite IX; ov — common oviduct; sbs — spermathecal basal sclerite; sc — seminal canal. Scale bars: 1 mm. Рис. 10–13. Pterostichus (Tausternus) hoii sp.n.: 10–11 — среднЯЯ долЯ Эдеагуса; 12 — праваЯ парамера; 13 — половой аппарат самки (больШаЯ часть сперматеки и желеЗа сперматеки удалены), вентрально; 10 — слева; 11 — дорЗально; bc — копулЯтивнаЯ сумка; gsc — гоносубкоксит; LTIX — латеротергит IX; ov — обЩий Яйцевод; sbs — баЗальный склерит сперматеки; sc — семенной канал. МасШтаб: 1 мм.