Nebria (Epinebriola) numburica, C.Huber & J.Schmidt, 2017

Huber, Charles & Schmidt, Joachim, 2017, Notes on the Nebria subgenus Epinebriola K. DANIEL, 1904 with the description of Barbonebriola subgen. nov. and 13 new species from the Himalaya-Tibet orogen (Coleoptera, Carabidae, Nebriini), Contributions to Natural History 36, pp. 1-85 : 51-54

publication ID	https://doi.org/ 10.5169/seals-787049
DOI	https://doi.org/10.5281/zenodo.6315671
persistent identifier	https://treatment.plazi.org/id/03948799-FFE9-FFF6-FF41-FC88FC68FBFE
treatment provided by	Carolina
scientific name	Nebria (Epinebriola) numburica
status	sp. nov.

Treatment

Nebria (Epinebriola) numburica View in CoL sp. nov. ( Fig. 26 View Fig )

Holotype ♂: Nepal, Solu Khumbu , S Dudh Kund , 4400 –4600 m, 27°42' N, 86°35' E, 25. V. 2013, leg. J. Schmidt ( cSCHM). GoogleMaps

Paratypes: 79 ♂ 45 ♀, same data as holotype ( NMBE, cSCHM) GoogleMaps ; 1 ♂ 1 ♀, Nepal, Solu Khumbu , S Dudh Kund , 4200–4400 m, 27°40'36" N, 86°35'26" E, 25. V. 2013, leg. J. Schmidt ( cSCHM) GoogleMaps ; 2 ♂ 2 ♀, Nepal, Solu Khumbu , S Dudh Kund , 4000–4100 m, 27°40'36" N, 86°35'26" E, 25. V. 2013, leg. J. Schmidt ( cSCHM) GoogleMaps .

Body length 11–12 mm. Colour black, shiny, appendages of head brown. Antennae brown, rarely the antennal scape or the entire antenna blackish darkened. Legs black, knees brownish lightened, tarsi brown.

Head with a shallow transverse impression behind the prominent eyes. Labrum with anterior margin straight, bearing six setae. Apical margin of clypeus straight. Clypeus laterally unisetose. Head supraorbitally unisetose, rarely asymmetrically bisetose or bisetose (in a single case in the type series). Frontal furrows shallow. Vertex finely transversally wrinkled but impunctate. Antennae long and slender extending to the middle of the elytra. Antennal scape elongate, as long as the eye's diameter, basally narrowed, cylindrical apically, with one dorsal seta. 2 nd Antennomere with one seta ventroapically. 4 th antennomere apically with a collar of long setae, without additional short setae. Penultimate labial palpomere bi- or trisetose, rarely asymmetrically with two and three setae. Ligula spiny, with two lateral setae. Maxillary stipes laterally straight, with 5–7 setae. Mentum with bifid medial tooth. Submentum with a row of 10–13 setae. Not or inconspicuously punctate on vertex. Microsculpture of the head isodiametric.

Pronotum transverse, subcordate, moderately convex, narrowed basally, lateral margin straight in basal half, rarely with a faint concave sinuation in front of the basal angles ( Fig. 31F View Fig ). Lateral groove very narrow, conspicuous, broadened basally. Lateral margin basally blade-like. Posterior angles acutely projected posteriorly. Anterior angles wide, rounded, weakly protruding. Basal margin bisinuate, with a deep incision towards the basal fovea. Pronotal disc weakly convex. Basal fovea deepened, apical and posterior transverse impressions well-defined; median longitudinal impression weak. Basal fovea and transverse impressions sparsely punctate, lateral groove only in the basal, broadened part punctate. Punctation of the apical transverse impression extended to the apical margin. Posterior part of the median longitudinal impression with faint wrinkles. Apical margination of the pronotum restricted to lateral one-third, merges with a distinct ridge at the apex of the anterior angle; the ridge continues along the lateral groove to the hindmost lateral seta. Basal margination of the pronotum absent. Basolateral seta present. 3–5 (rarely two) midlateral setae in the apical half of the pronotum. Midlateral setae conspicuously inserted on the egde of the lateral margin, the large insertion grooves disturb the outline of the pronotum. Microsculpture of the pronotum isodiametric, impunctate on disc. Proepisternum sparsely and faintly punctate; prosternal process elongate, rounded apically, unmargined.

Elytral silhouette moderately convex, ovoid-elongate, narrowed basally, widest in the apical half of the elytra, no subapical sinuation. Elytral apex sharp, rounded. Basal margination straight, smoothly merged, or joined at an obtuse angle, with the lateral margination. Humeral carina faintly developed. Subapical carina absent. Striae on disc finely punctuate, striae only very weakly deepened, nearly inexistent. Striae and punctation obliterate towards the basal margin and towards the apex; striae 6–8 visible as a faint trace of punctation. Intervals flat; 3 rd interval with 5–8 long setae adjoining stria 3. 5 th interval often (59%) with 1–3 setae. 7 th interval rarely (14%) with 1–4 setae. Scutellar seta present. Microsculpture transverse-oblong. Mesepisterna smooth with a few strong punctulae. Metepisterna 1.6 times as long as wide; smooth. Hind coxa with 2–4 basal and one apical setae. Hindwings present as a short strap-like vestige.

Sternum 3 with a row of 4–7 medial setae. Sterna 4–6 each with 3–6 posterior paramedial setae; anal sternum with 1–3 paramedial setae in male, 3–4 in female. All sterna with faint impressions laterally.

Legs long and slender. All tarsi dorsally glabrous, rarely with a few short setae. Protarsus of male with tarsomeres 1–3 distinctly broadened, with pads of adhesive setae ventrally. Apex of hind tarsomere 4 ventrally markedly projected. Meso- and metatarsomeres 2–4 ventroapically with long setae. All tarsomeres 5 ventrally with two rows of 3–4 short setae. Metatarsomere 5 longer than the metatarsomeres 3+4.

Male genitalia: Edeagus ( Fig. 20E View Fig ): Basal part of the median lobe wide, with triangular basolateral lobes. Mid-shaft strongly curved at base on the inner side, and shallowly curved on the outer side forming a flat angle; moderately curved at apex. Apex long, slender, acute, faintly deflected to the left. Midshaft of the endophallus asetose.

Female genitalia: Gonocoxa ( Fig. 10F View Fig ): Gonocoxite 2 triangular, half the length of gonocoxite 1, broad at base. Apex broadly rounded, slightly arcuate dorsally, dorsally slightly grooved ( Fig. 10G View Fig ). Ventral preapical insertion furrow elongate-oval, with two nematiforme setae. Gonocoxites ventrally unjointed and continuously sclerotized, dorsally separated by a membranous area.

Body ratios: hea.w/fro.w = 1.46± 0.034 (1.39–1.53); prm.w/hea.w = 1.24± 0.023 (1.19–1.30); prm.w/prp.w = 1.53±0.047 (1.41–1.57); pra.w/prp.w = 1.16± 0.030 (1.09–1.20); ely.w/prm.w = 1.59±0.044 (1.51–1.69); prm.w/prm.l = 1.31± 0.038 (1.26–1.38); ely.l/ely.w = 1.62±0.027 (1.58–1.67).

Etymology: The specific epithet refers to the Numbur Mountain North of the type locality.

Diagnosis: Due to the polysetose lateral margin of the pronotum and the polysetose 3 rd abdominal sternum N. numburica sp. nov. belongs to the molendai species group ( N. molendai , N. christinae , N. numburica ). The molendai species group is also characterized by the similar shape of gonocoxite 2, which have a broadly rounded apex in contrast to the similar gonocoxite 2 of N. tuberculata sp. nov. with an acuminate apex. These three species of the molendai group inhabit the neighboring massifs of the Rolwaling Himal and the Solu Khumbu Massif. N. numburica sp. nov. differs from N. christinae by the transverse pronotum, which is very slender in N. christinae . N. numburica sp. nov. differs from N. molendai by the sparsely punctate pronotum, which is coarsely and densely punctate in N. molendai , and by the long and slender apex of the median lobe, which is shorter in both N. molendai and in N. christinae .

The rasa species group ( N. rasa , N. schawalleri , N. martensi ) of Eastern Nepal, which is characterized by the polysetose lateral margin of the pronotum as in the molendai species group, differs from the molendai species group by the absence of setae on the 3 rd abdominal sternum (present in the molendai species group).

Distribution ( Fig. 41 View Fig ): Known only from the type locality in the headwaters of the Dudhkund Khola on southern slope of the Shorong Himal, Solu Khumbu district, eastern Central Nepal.

Habitat ( Fig. 27 View Fig ): The specimens were collected alongside melt water streams and at the edge of a rivulet in the lower alpine and subalpine zones.

Monophyly. The monophyly of the molendai species group ( N. molendai , N. christinae and N. numburica sp. nov.) appears clearly and is suggested by four characters: the polysetose lateral margin of the pronotum, the absence of setae on the 3 rd abdominal sternum, and the resemblances in the shapes of the median lobes and of the gonocoxites 2. Moreover, the separated distribution of the molendai species group is also consistent with its monophyly.