Pterostichus laocaiensis Fedorenko, 2019

Fedorenko, D. N., 2019, New species of Pterostichus subgenus Circinatus (Coleoptera: Carabidae: Pterostichini) from Vietnam, Russian Entomological Journal 28 (4), pp. 358-369 : 368-369

publication ID

https://doi.org/ 10.15298/rusentj.28.4.03

persistent identifier

https://treatment.plazi.org/id/03A72929-FB5E-FF85-FCDF-E3CFFEB5BFDC

treatment provided by

Felipe

scientific name

Pterostichus laocaiensis Fedorenko
status

 

4. Pterostichus laocaiensis Fedorenko View in CoL , sp.n.

Figs 7 View Figs 4–7 , 14–15 View Figs 8–15 , 20 View Figs 16–20 , 26–27 View Figs 21–30 , 41–42 View Figs 37–42 .

MATERIAL. Holotype ♂ ( ZMMU) and paratype ♂ ( SIEE), labelled: ‘N Vietnam, Lao Cai Prov., Hoang Lien Son Mt. Ridge, env. Fansipan [=Phahg Xi Pang] Mt , Tram Ton , h=1950–2100 [m], 15–30.VII.2007, leg. D. Fedorenko’.

DIAGNOSIS. As for P. phangxipang sp.n., except for pronotal posterolateral seta missing, body slender, pronotum barely longer than wide and subsinuate on sides in basal half, pronotal and elytral microsculpture consisting of dense transverse lines; elytral basolateral bead missing, parascutellar striole entire; meso- and metatarsomeres 1–3 carinate and sulcate laterally; distal femoral seta missing. For additional differences see description.

DESCRIPTION. Body slender ( Fig. 7 View Figs 4–7 ), BL 13–13.2 mm.

Head: Frontal sulci straight and slightly diverging. Labrum sinuate apically.

Pronotum very slender, broadest two fifths from apex, barely longer than wide, PW/PL 0.93–0.97, PW/HW 1.28– 1.35, with sides subsinuate before base. Base subconvex to truncate, PB/PA 0.81–0.85; apex subconvex to truncate between slightly projecting apical angles, with apical bead entire or interrupted just medially. Disc with indistinct basal and apical transverse impressions; median line fine and nearly entire, ill-defined basally and almost reaching apex; sublateral line missing. Basal sulci γ- shaped combined, inner long, running in basal two fifths and S-shaped, anteriorly parallel, then diverging and afterwards incurved just in front of base; outer sulcus vestigial, very short and shallow, running close to lateral bead. Lateral bead obliterate just in front of basal angle.

Elytra oblong, EW/EL 1.78–1.80, EW/PW 1.26–1.33, broadest three fifths from base, with an indistinct preapical sinuation, apices truncate combined or rounded separately each. Base long, with lateral bead obliterate; humeral tooth vestigial. Intervals convex. Discal seta d2 about 3/5 distant from base. USS: 16–17.

Prosternal process with posterior declivity convex, narrow and subcostate at medial constriction.

Aedeagus ( Figs 14–15 View Figs 8–15 , 20 View Figs 16–20 , 26–27 View Figs 21–30 ): median lobe ventrally carinate in basal half, with a convex ridge in middle third of right ventrolateral margin; apex in dorsal view fairly long, parallel-sided, rounded apically, with a shallow groove that is oblique to the right. Everted and inflated internal sac ( Figs 41–42 View Figs 37–42 ) bent to the left and then ventrad.

NAME. Refers to Lao Cai Province, Vietnam, from where the species is described .

DISTRIBUTION. Known from the type locality only, Mt. Phang Xi Pang , northern Vietnam .

HABITATS AND HABITS. The species was hand collected under bark of a not quite fallen dead tree in a cloudy forest.

Acknowledgements. This study was funded by the Presidium of the Russian academy of sciences, Program No.41 “Biodiversity of natural systems and biological resources of Russia ”.

ZMMU

Zoological Museum, Moscow Lomonosov State University

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Carabidae

Genus

Pterostichus

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