Bothynogria annamita, Telnov, 2023

Telnov, Dmitry, 2023, New and poorly-known taxa of Lagriinae Latreille, 1825 (Coleoptera: Tenebrionidae) predominantly from the collections of the Naturkundemuseum Erfurt. 1, Baltic Journal of Coleopterology 23 (1), pp. 1-33 : 1-33

Bothynogria annamita sp. nov. ( Figs 12-13 )

urn:lsid:zoobank.org:act:18AA7124-0A2C-40B5-8FF3-6BF106302B6F

Type material designated. Holotype male NME: C– VIETNAM, Thira Thiên-Huế Pr. Phú L ộc, Bach Mã NP, 16°11'39''N 107°51'12''E, 1250–1400m 05.-09.V.2019, leg. A. Skale cutting area /prim. forest [printed] [the antennomeres 10–11 of the left and 9–11 of the right antenna missing].

Derivatio nominis. Named after the Annamite Range in Indochina Peninsula where the new species occurs.

Measurements. Holotype male, total body length 8.3 mm; head length 1.3 mm, maximum head width across compound eyes 1.3 mm, pronotal length 1.3 mm, maximum pronotal width across base 1.5 mm, elytral length 6 mm, combined maximum elytral width across postmedium 3.4 mm.

Description. Holotype male ( Fig. 12A ).

Dorsal and ventral forebody uniformly dark rufous. Elytra yellow, narrow, elongate scutellar spot, suture and irregularly shaped, transversely-elliptical median spot black to black-brown. Legs dark rufous, three to four terminal antennomeres nearly black. Ventral pterothorax black-brown, abdomen brown with yellowish terminalia. Head elliptical, about same wide as long, slightly glossy dorsally and ventrally. Labrum shallowly emarginate at anterior margin. Epistoma deeply V-shapely emarginate at anterior margin. Frontoepistomal impression deep, distinct. Anterolateral area of frons slightly projected laterodorsad to hold insertion of antenna. Compound eye large, strongly kidney-shaped, strongly emarginate at anterior, broadly and shallowly - at posterior margin in lateral view, not touching insertion of antenna, moderately prominent in lateral and dorsal aspects. Interfacetal setae not observed. Minimum interocular distance about 0.8× a length of dorsal eye portion. Tempus about half a length of dorsal eye portion, constricted posteriad, posterior temporal angle round- ed, head base subtruncate. Head dorsum moderately densely punctate with circular to irregularly shaped, moderately deep punctures. Intervening spaces narrower than to as wide as punctures, glossy. Head dorsal setation yellowish, long to moderate, moderately dense, sub- to erect, not concealing dorsal sculpture of head. Antenna long, filiform and slender, antennomeres 1–10 extending towards mesocoxa when directed posteriad (the total length of male antenna is unknown since two terminal

17 antennomeres of both antennae are missing in the only available specimen). Basal antennomere slightly thickened, about 1.7× as long as antennomere two. Antennomere two strongly shortened. Antennomere three about 2.5× as long as antennomere two, about as long as each antennomere four and five. Antennomeres 7–9 slightly thickened compared to previous antennomeres, denser punctured and subopaque. Terminal maxillary palpomere strongly securiform. Cranial ‘neck’ partially exposed from beneath anterior margin of pronotum, glossy dorsally and ventrally, punctured similar as head dorsum. Pronotum trapezoid, slightly transverse, slightly glossy dorsally and laterally, and flattened dorsally, subtruncate at both anterior and posterior margin. Maximum width across base, slightly expanding premedium on lateral margins, slightly constricted anteriad and prebasally. Anterior rim or bead not present, posterior margin indistinctly beaded by a row of punctures. Antero- and posterolateral angles obtuse angulate in dorsal view. Pronotal disc with a vague, paired elliptical postmedian impression. Dorsal pronotal punctures similar to those on dorsal head but denser and shallower. Intervening spaces narrower than punctures, slightly elevated, glossy. Dorsal pronotal setae as those on head but whitish and some setae appressed. Pronotal hypomeron separated from disc by rather deep furrow which discontinuous shortly ahead of posterolateral angle. Scutellar shield small, triangular, apically pointed, glossy, setose. Elytron widened postmedium, dorsally moderately convex, slightly glossy. Apical sutural angle narrowly rounded. Elytral punctures more regularly circular and larger but sparser compared to those on dorsal forebody, rather deep. Intervening spaces generally wider than to as wide as punctures. glossy. Elytral setae whitish, long, moderately dense, suberect. Epipleuron complete, broad in basal half, densely punctured and sparsely setose. Metathoracic wings fully developed (functional). Legs

18 long, slender, femora and tibiae slightly glossy, femora slightly thickened, sparsely setose, tibiae densely and long, whitish to yellowish setose. Tibiae subequally long to corresponding femora. Male protibia with a minute denticle in distal third at inner margin ( Fig. 12B ), meso- and metatibia with a conspicuous median denticle at inner margin and a row of much smaller denticles (one or two in front and several between median denticle and distal part of tibia)

( Fig. 9a ). Tarsomeres widened likely pointing on arboreal lifestyle. Basal metatarsomere shorter than combined length of remaining metatarsomeres. Male tergite VII and morphological sternite VII broadly rounded at posterior margin. Aedeagus as in Fig. 13 .

Sexual dimorphism. Female is unknown.

Differential diagnosis. Bothynogria annamita sp. nov. is unique among its congeners due to the striking dorsal body colouration, the unidenticulate protibia, the long setae of the dorsum and the remarkably shallow (indistinct)paired postmedian impression of the pronotum.

Ecology. Occurs at about 1250–1400 m. Diurnal, observed on low vegetation.

Distribution. Annamite Range in central Vietnam.

‘criticus’ to point on weakness of the present concept of lagriine genera, in general, and Cerogria -similar genera, in particular, introduced by Borchmann in the early 1900s and largely unchanged since that. See ‘Discussion’ for the details.

Measurements. Holotype male, total body length 8.3 mm; head length 1.2 mm, maximum head width across compound eyes 1.3 mm, pronotal length 1.5 mm, maximum pronotal width across midlength 1.55 mm, elytral length 5.6 mm, combined maximum elytral width across postmedium 3 mm. Paratype females 9.3–9.8 mm long.

Note. Male terminal antennomere is serrate/denticulate or carinate at posterior margin ( Borchmann 1936; Wu et al. 2021). Since the shape of male terminal antennomere remains unknown for this species, its position in Bothynogria is tentative.

Figures

Fig. 12. Bothynogria annamita sp. nov., holotype male. A – Habitus, dorsal view; B – Right protibia, dorsal view [not to scale].

Fig. 13. Bothynogria annamita sp. nov., holotype male, aedeagus in dorsal (A), ventral (B) and lateral (C) view.

Fig. 9.Bothrichara skalei sp. nov. A – Holotype male, habitus, dorsal view; B – Paratype male, habitus, dorsal view; C – Paratype male, metatibia, dorsal view [not to scale].