Pterostichus ( Morphohaptoderus ) lingjun, Wu & Chen & Shi, 2025
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publication ID |
https://doi.org/10.3897/dez.72.159716 |
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publication LSID |
lsid:zoobank.org:pub:4E7218B5-5027-4D89-BB17-6E60CEF7FE7E |
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DOI |
https://doi.org/10.5281/zenodo.17807487 |
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persistent identifier |
https://treatment.plazi.org/id/518B5E18-3ABA-5139-9B23-6AFF4868F5BD |
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treatment provided by |
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scientific name |
Pterostichus ( Morphohaptoderus ) lingjun |
| status |
sp. nov. |
[5] Pterostichus ( Morphohaptoderus) lingjun sp. nov.
Figs 2 F View Figure 2 , 3 E View Figure 3 , 5 E View Figure 5 , 12 J View Figure 12 , 15 View Figure 15
Type material.
Holotype: Hubei • ♂, labeled “ Hubei Province, Shennongjia, Guanmenshan , N 31.4362, E 110.3824, pitfall trap, 1361 m, 2022. VII. 29, Hongliang Shi & Ganyan Yang leg. ” [in Chinese] ( IZAS) GoogleMaps . Paratype: Hubei • 1 ♀, the same data as holotype ( CBFU) GoogleMaps .
Diagnosis.
Large-sized species for the subgenus ( BL = 11.5–11.6 mm); elytral microsculpture linear in males, granular in females; antennomere 3 without accessory seta; pronotal basal foveae densely punctate; area between lateral channel and outer sulcus shallowly ridged, at most with one or two fine punctures; the outer sulcus about half length of the inner one; elytral interval 3 with two setigerous pores, all adjacent to stria 2; male sternite VII asymmetrically depressed, without wrinkles; male genitalia with relatively thick and short lamellar tooth, much less than the length of lamellar apex.
Comparisons.
The new species, P. lingjun sp. nov., is external very similar to P. quyuani sp. nov., which was also found in Shennongjia, Hubei Province. These two species only have inconspicuous external differences which explicated as follows: (1) P. lingjun sp. nov. generally has a slightly larger body size; (2) the area between lateral channel and outer sulcus usually more distinctly punctate in P. quyuani sp. nov. (Fig. 3 E View Figure 3 ); (3) in P. lingjun sp. nov., the first discal pore on elytral interval 3 positioned relatively more towards the posterior. In the only two known specimens of P. lingjun sp. nov., the index of the first discal pore on elytral interval 3 is between 0.42 and 0.48 (derived from the ratio of the distance between elytral base and the first discal pore to EL), and this index is usually from 0.30 to 0.36 in P. quyuani sp. nov. However, because P. quyuani sp. nov. is a relatively common species, there are a few exceptional specimens in which this index approximates to that of P. lingjun sp. nov.
Although these two species have a striking external similarity, the characters on male sternite VII and aedeagus are distinct between them: (1) in P. quyuani sp. nov., the male sternite VII are distinctly wrinkled on left-posterior side (Fig. 2 B View Figure 2 ), but without wrinkles in P. lingjun sp. nov. (Fig. 2 F View Figure 2 ); (2) in the aedeagus of P. quyuani sp. nov., the lamellar denticle is particular large, nearly twice as long as the lamellar apex (Fig. 12 F – I View Figure 12 ); in contrast, in P. lingjun sp. nov., the lamellar denticle is much smaller than the lamellar apex (Fig. 12 J View Figure 12 ); (3) in P. quyuani sp. nov., the ventral surface of median lobe of aedeagus with a strong ridge that sinuate and extends to base (Fig. 8 C View Figure 8 ); but in P. lingjun sp. nov., this ridge is much shallower, straight and disappeared before base (Fig. 15 C View Figure 15 ). Although the above distinct differences exist for males, the females of these two species are very difficult to differentiate. The most reliable way to distinguish the females between these two species may merely be the altitude at which the specimens were collected. P. lingjun sp. nov. was only found in Guanmenshan of Shennongjia at the altitude of about 1361 m, but all specimens of P. quyuani sp. nov. were collected at the altitude above 1600 m.
P. lingjun sp. nov. is also similar to P. lisao sp. nov. for their male sternite VII depressed without wrinkles and median lobe of aedeagus relatively stout. These two species are different in the following aspects: (1) in P. lisao sp. nov., the outer sulcus of pronotal basal fovea strongly reduced, less than one-third length of inner one (Fig. 3 D View Figure 3 ); whereas in P. lingjun sp. nov., the outer sulcus is normal as other species, about half length of the inner one (Fig. 3 E View Figure 3 ); (2) in P. lingjun sp. nov., the male sternite VII more widely depressed, the depression with a branch extending to the basal-left side of the sternite (see the white arrow in Fig. 2 F View Figure 2 ); but the basal-left side not depressed in P. lisao sp. nov. (Fig. 2 E View Figure 2 ); (3) in the aedeagus of P. lingjun sp. nov., the lamellar denticle smaller, in lateral view much shorter than the lamellar apex (Fig. 12 J View Figure 12 ); whereas in P. lisao sp. nov., lamellar denticle larger, about in same length of lamellar apex (Fig. 13 A – E View Figure 13 ); (4) in P. lisao sp. nov., the lamellar denticle forming a distinct angle (about 110 °) with lamellar apex, but in P. lingjun sp. nov., these two structures almost collinear; (5) in the median lobe of aedeagus of P. lingjun sp. nov., the ventral surface only with one short ridge before apical orifice (Fig. 15 C View Figure 15 ), but with three ridges in P. lisao sp. nov. (Fig. 14 C View Figure 14 ).
P. lingjun sp. nov. is also similar to P. shennongjianus and P. wangshu sp. nov., all distributed in Shennongjia. The present new species is different from P. shennongjianus for the elytral interval 3 with only two setigerous pores; the area between lateral channel and outer sulcus less convex; male sternite VII more distinctly depressed. And from P. wangshu sp. nov., the present new species is different in the antennomere 3 without accessory setae, median lobe of aedeagus stouter with thicker apical lamella.
Description.
BL = 11.5–11.6 mm, BW = 4.5–4.7 mm; dorsal surface dark brown to black, appendages brown; elytral microsculpture linear in males, granular in females (Fig. 15 F, G View Figure 15 ).
Head slightly thickened, HW / PW = 0.57–0.58; frons without puncture; frontal sulci short and shallow; antennae reaching elytral basal sixth, antennomere 3 without accessory seta; eyes large and hemispherical, tempora very shortly swollen behind eyes; submentum with one seta on each side.
Pronotum rounded-rectangular, wider than length, PW / PL = 1.31–1.37, widest near middle, PBW / PW = 0.70–0.74. Anterior margin concaved at middle, slightly narrower than posterior margin, PAW / PBW = 0.81–0.82; anterior angles broadly rounded, weakly projecting; lateral margins evenly arched, gently narrowed toward base, without sinuation before posterior angles, posterior angles right-angled, usually with a faint denticle weakly projecting out. Basal foveae (Fig. 3 E View Figure 3 ) densely punctate along inner and outer sulci, as well as on intersulcate area; inner and outer sulci both with well-defined boundaries; inner sulcus straight and oblique, outer sulcus shallower, about half length of inner one; intersulcate area slightly convex; lateral channels relatively wide, with fine but distinct punctures along their full length; area between lateral channel and outer sulcus shallowly ridged, without or with one or two very fine punctures. Pronotal disc with very faint transverse wrinkles aside median line; median line shallow; basal median area with a few punctures near inner sulcus.
Elytra broad and flat, lateral sides slightly expanded behind middle, BW / EL = 0.68–0.69. elytral basal border nearly straight at middle, strongly curved anteriorly near shoulder, forming a faint obtuse angle with lateral margin, humeral tooth small, apex faintly pointed; striae very finely punctate before middle; parascutellar striole joined to apical portion of stria 1, angular base of stria 1 short with free apex (Fig. 3 E View Figure 3 ). Parascutellar pore present; elytral interval 3 with two setigerous pores, the first pore only slightly anterior to the middle, all pores adjacent to stria 2; umbilical pore series on ninth interval sparse in middle, composed of 16–18 pores (6–7, 2–3, 8–9).
Fifth tarsomeres with 4–5 pairs of setae ventrally.
Male sternite VII shallowly but distinctly depressed at middle, the depression somewhat asymmetric and not wrinkled, with a branch extending to the basal-left side of the sternite; with strong isodiametric microsculpture on center of the depression, gradually turned to shallower and transverse microsculpture to lateral regions; apex of sternite truncated (Fig. 2 F View Figure 2 ).
Median lobe of aedeagus (Fig. 15 B View Figure 15 ) stout; in lateral view, ventral margin evenly curved along the full length, nearly straight before apical lamella, abruptly bent ventrally near apex; apical orifice large, strongly turned to left, opened to left-dorsal surface of aedeagus. Ventral surface with a short ridge before apical orifice (Fig. 15 C View Figure 15 ): right ridge sharp, only present on apical orifice and apical lamella; median ridge strongest, from the level of base of apical orifice to midpoint of apical orifice; left ridge absent. Apical lamella relatively thick and short (Fig. 15 A View Figure 15 ), wide in dorsal view, apex widely rounded; with small lamellar denticle on left margin, a little distant from base of apical lamella; in lateral view, lamellar base about in similar length of lamellar apex, lamellar denticle short, distinctly shorter than lamellar apex ( laL / ldL = 1.50), nearly collinear with lamellar apex. Right paramere short, apex rounded (Fig. 15 E View Figure 15 ).
Endophallus of male genitalia not studied due to restricted materials.
Gonocoxite 2 of female ovipositor crescent-shaped (Fig. 5 E View Figure 5 ), sharply pointed apically; outer margin with two ensiform setae of normal size, length of the largest ensiform seta ca. 0.06 mm, dorsal margin with one ensiform seta near middle, strongly ridged from the ensiform seta to apex of gonocoxite 2, one nematiform seta located on the apical sixth of outer surface.
Distribution.
This species is only known from the type locality, Guanmenshan, in Shennongjia, Hubei Province. The altitude is much lower ( 1361 m) than other species distributed in Shennongjia.
Etymology.
The scientific name of the new species is derived from Qu Yuan’s work “ Li Sao ”: 名余曰正则兮 [Ming Yu Yue Zheng Ze Xi], 字余曰灵均 [Zi Yu Yue Ling Jun]. This couplet can be translated as: My formal name was Zhengze, and my courtesy name was Lingjun. Lingjun (灵均), which implies equilibrium, is Qu Yuan’s declared literary name in “ Li Sao. ” The name is treated as a noun in apposition.
| IZAS |
Institut Zoologii Akademii Nauk Ukraini - Institute of Zoology of the Academy of Sciences of Ukraine |
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.
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Tribe |
Pterostichini |
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SubTribe |
Pterostichina |
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Genus |
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SubGenus |
Morphohaptoderus |