Pterostichus (Chinapterus) lianhuaensis, Dorjderem & Shi & Liang, 2020
|
publication ID |
https://dx.doi.org/10.3897/zookeys.953.52282 |
|
publication LSID |
lsid:zoobank.org:pub:3C362CD3-1D85-47DE-A703-AF44067AC929 |
|
persistent identifier |
https://treatment.plazi.org/id/DE1CB5E1-EA91-4EDE-A244-70FC63F5DCFD |
|
taxon LSID |
lsid:zoobank.org:act:DE1CB5E1-EA91-4EDE-A244-70FC63F5DCFD |
|
treatment provided by |
|
|
scientific name |
Pterostichus (Chinapterus) lianhuaensis |
| status |
sp. nov. |
Pterostichus (Chinapterus) lianhuaensis sp. nov. Habitus, Figs 26 View Figures 24–29 , 27 View Figures 24–29 ; male genitalia, Figs 34-37 View Figures 30–41 , 45 View Figures 42–57 , 52-54 View Figures 42–57 ; female genitalia, Figs 61 View Figures 58–65 , 62 View Figures 58–65
Type series.
Holotype: male (IZAS) [Figs 26 View Figures 24–29 , 34 View Figures 30–41 , 35 View Figures 30–41 , 45 View Figures 42–57 , 52 View Figures 42–57 ], China, Gansu, Kangle, Lianhuashan, Shahetan station 34.93917N, 103.73472E / 2850 m, 2008.VI.1, WANG J. leg.; pit fall; Institute of Zoology. Paratypes: 1 male and 1 female (IZAS), 2012,VI,21 D 2960 m, China, Gansu, Kangle, Lianhuashan, 34.93577N, 103.75054E / Morii leg., Inst. of Zoology, CAS. 1 male and 2 females (IZAS) [Figs 27 View Figures 24–29 , 36 View Figures 30–41 , 37 View Figures 30–41 , 53 View Figures 42–57 , 62 View Figures 58–65 , 63 View Figures 58–65 ], 2012,VI,22. D 2960 m, Gansu, Kangle, Lianhuashan, 34.91943N, 103.72860E / Liang Hongbin, Sota leg., Inst. of Zoology, CAS. 1 male and 1 female (IZAS) [Fig. 54 View Figures 42–57 ], China, Gansu, Kangle, Lianhuashan, Shahetan station 34.93917N, 103.73472E / 2850 m, 2008.VII.6, WANG J. leg.; pitfall trap; Institute of Zoology.
Diagnosis.
Femora black; pronotum cordate, lateral margins strongly sinuate before basal angles, which clearly pointed outwards; basal foveae convex between inner and outer grooves; elytral basal pore present, third interval often with three setigerous pores; fifth tarsomere with one or two pairs of fine setae ventrally; right paramere strongly elongated and bent, apex slightly bent to dorsum, angulate at dorso-apical end.
Description.
BL 12.3-13.6 mm, BW 5.0-5.5 mm. Robust, black, femora completely black, elytra slightly shiny. Head large, frons smooth or very sparsely punctate; genae short, less than one-third length of eyes; eyes prominent. Pronotum cordate; widest slightly before middle, PW/PL = 1.31-1.40; lateral margins largely rounded before middle, strongly sinuate before basal angles; one mid-lateral seta present at apical one-third; basal margin slightly wider than apical margin, PBW/PAW = 1.02-1.13; basal angles rectangular, clearly protruding outwards; basal foveae narrow and deep, inner groove well present, apex reaching basal third of pronotum, outer groove obsolete; basal fovea convex between inner and outer grooves, not convex between outer groove and lateral margin, basal foveal area coarsely punctate; disc convex, smooth, finely transversely rugose on basal half; apical angles rounded, not protruding. Elytra oblong, EL/EW = 1.36-1.46; basal ridge slightly oblique; shoulder rounded, basal ridge and lateral margin forming an obtuse angle, humeral tooth small and obtuse; apical plica indistinct; basal setigerous pores present; scutellar striae complete; intervals slightly convex, microsculpture similar in both sexes, finely isodiametric; third interval usually with three setigerous pores, the basal one at basal seventh, adjacent to third stria, the apical two at basal two-fifths and two-thirds respectively, all adjacent to second stria, occasionally with four or five pores on one elytron; ninth interval with umbilical series regularly arranged, slightly sparser in middle; striae deep, indistinctly punctate. Fifth tarsomere with one or two pairs of setae ventrally; meso- and metatarsomere I and II with outer groove. Terminal ventrite shallowly depressed and finely rugose in males. Male genitalia. Ventral margin of median lobe near straight at middle, gradually bent downwards near apex; apical orifice opened left-dorsally; apical lamella small, rounded triangular, length subequal to basal width, apex rounded, weakly bent to left (Figs 34 View Figures 30–41 , 35 View Figures 30–41 ); apical lamella slightly twisted, forming a continuously curved dorsal-left surface (Fig. 45 View Figures 42–57 ). Right paramere strongly elongate and curved, the acute angle between basal portion and apical portion 85-90°; apex slightly thick, slightly angulate at dorsal-apical end, slightly bent to dorsum (Figs 52-54 View Figures 42–57 ). Endophallus bent to the ventral side of aedeagus, major portion of endophallus located at ventral side of median lobe apex; gp opened to basal-dorsum; gpl large and coniform; gpp large and cap-like, on ventral side of gp; three groups of lobes recognized: rl on ventral-right surface of endophallus, large, near rounded, without projection; lbl on ventral-left surface of endophallus, large and fully round, not divided into sub-lobes; lal on left surface of endophallus, very small, rounded or divided into two small sub-lobes (Figs 36 View Figures 30–41 , 37 View Figures 30–41 ). Female genitalia same as that of P. przewalskyi (Figs 62 View Figures 58–65 , 63 View Figures 58–65 ).
Distribution.
Only known from the type locality, Lianhua Shan mountain, Kangle County, south of Gansu province (Map 3 View Map 3 ).
Etymology.
The name of the new species refers to its type locality, Lianhua mountain.
Remarks.
This species is similar to P. przewalskyi in having a large body size, lateral margins of the pronotum strongly sinuate before basal angles, but differs from the latter in: (1) femora completely black; (2) basal foveae convex between inner and outer grooves; (3) elytra third interval usually with three pores, the basal one adjacent to the third stria; (4) fifth tarsomere with one or two setae ventrally. In P. przewalskyi , femora reddish brown; basal foveae of pronotum depressed between inner and outer grooves; elytral third interval usually with two pores, if with three the basal one adjacent to the second stria; fifth tarsomere glabrous ventrally. The male genitalia of these two species are very similar, with small differences in: (1) apical lamella of aedeagus weakly bent to left in P. lianhuaensis sp. nov. (Fig. 34 View Figures 30–41 ), almost straight in P. przewalskyi (Fig. 30 View Figures 30–41 ); (2) apex of right paramere slightly angulate at dorsal-apical end in P. lianhuaensis sp. nov., completely rounded in P. przewalskyi ; (3) right paramere more bent in P. lianhuaensis sp. nov., forming an acute angle 85-90°, versus 100-105° in P. przewalskyi ; (4) endophallus with lbl not divided and lal present in P. lianhuaensis sp. nov., lbl divided into two sub-lobes and lal absent in P. przewalskyi .
We noticed that this new species only has very minute differences from P. przewalskyi in the male genitalia. However, considering the stable gaps between their features (especially the external characters) and distributions, we decide to establish a new species but not a new subspecies. A similar situation is also present in the next new species, P. liupanensis . Several external differences among these three species are generally of interspecific level in other Pterostichus groups, such as the shape of the pronotum base and basal fovea, chaetotaxy on elytral third interval, and setae on the fifth tarsomere.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.