Ptomaphaginus gutianshanicus, Wang, Cheng-Bin & Zhou, Hong-Zhang, 2015

Wang, Cheng-Bin & Zhou, Hong-Zhang, 2015, Taxonomy of the genus Ptomaphaginus Portevin (Coleoptera: Leiodidae: Cholevinae: Ptomaphagini) from China, with description of eleven new species, Zootaxa 3941 (3), pp. 301-338 : 317-319

publication ID

https://doi.org/ 10.11646/zootaxa.3941.3.1

publication LSID

lsid:zoobank.org:pub:9907D081-A413-44F1-ABF6-76CC13DC8813

DOI

https://doi.org/10.5281/zenodo.5691670

persistent identifier

https://treatment.plazi.org/id/03EC87E6-FF95-8808-9DBF-1BF0FC990D59

treatment provided by

Plazi

scientific name

Ptomaphaginus gutianshanicus
status

sp. nov.

Ptomaphaginus gutianshanicus View in CoL sp. nov.

( Figs. 1 View FIGURE 1 A–K; 10A–J)

Type material. Holotype: CHINA, Zhejiang: ♂, Gutianshan [=Mt. Gutian], 296–402 m, broadleaved mixed forest, pitfall trap, 30.IV–3.V.2010, Chong-Ling Liu leg. (IZ-CAS). Paratypes: 20♂♂, 48♀♀, same data as holotype (IZ-CAS); 2♀♀, same data as holotype except: 446–715 m, 11–14.VI.2009 (IZ-CAS); 1♀, same data as holotype except: 296 m, 20–23.VI.2009 (IZ-CAS); 2♀♀, same data as holotype except: 500–750 m, 22–25.VI.2009 (IZ-CAS); 1♀, same data as holotype except: 429 m, 2–5.VIII.2009 (IZ-CAS); 1♀, same data as holotype except: 446–715 m, 9–12.IX.2009 (IZ-CAS); 1♀, same data as holotype except: 560 m, 16–19.IX.2009 (IZ-CAS); 1♂, 1♀, same data as holotype except: 446–715 m, 23–27.IX.2009 (IZ-CAS); 1♀, same data as previous except: 19–22.X.2009 (IZ-CAS); 79♂♂, 114♀♀, same data as holotype except: 446–715 m, 1–4.V.2010 (IZ-CAS); 17♂♂, 37♀♀, same data as holotype except: 390–605 m, 2–5.V.2010 (IZ-CAS); 2♂♂, 2♀♀, same data as holotype except: 543–823 m, 10–13.V. 2010 (IZ-CAS); 6♂♂, 16♀♀, same data as holotype except: 308–605 m, 23–27.V.2010 (IZ-CAS); 7♂♂, 9♀♀, same data as holotype except: 446–823 m, 25–29.V.2010 (IZ-CAS).

Description. Male. EBL: 2.37 mm. Length of different body parts: HL: AL: PL: ELL = 0.40: 0.73: 0.65: 1.23 mm; width: HW: EW: PW: ELW = 0.67: 0.08: 1.12: 1.00 mm. Proportion of antennomeres from base to tip in µm (length × width): 127 × 39, 100 × 38, 53 × 32, 43 × 39, 46 × 44, 34 × 59, 51 × 69, 22 × 67, 62 × 75, 59 × 77, 115 × 76.

Habitus elongated oval, relatively convex and rather lustreless. Moderately pigmented: mostly chestnut brown, occiput somewhat darker; only mouthparts, antennae, elytral apex and tarsi yellowish. Dorsum continually clothed with fine, recumbent and sallow pubescence. Insertions of pubescence on dorsal surfaces of pronotum, scutellum, elytra and femora align along transverse striolations ( Fig. 1 View FIGURE 1 A).

Head moderately short and gently convex, surface finely punctured, without visible transverse striolations, HW/HL = 1.67; anterior margin round. Compound eyes well developed, EW/HW = 0.12. Antennae slender but not very long ( Fig. 10 View FIGURE 10 A), AL/HW = 1.10; 5th slightly longer than 4th; 6th wider than long; 9th and 10th slightly wider than long; 11th pear-like.

Pronotum moderately transverse and convex ( Fig. 10 View FIGURE 10 D), widest at base, PW/PL = 1.72. Sides almost rectilinearly narrowing from posterior to anterior; hind corners drawn out and bluntly rouned. Posterior margin with distinct postero-lateral emargination. Surface transversely striolated, SP: 41–45, interspaces narrower than that on elytra.

Elytra of medium length and weakly convex, widest directly after base, ELL/EW = 1.23. Sides feebly curved, gradually narrowing from base to apices; apices obliquely truncated ( Fig. 1 View FIGURE 1 A). Surface transversely striolated, SE: 65–68. Metathoracic wings fully developed.

Prolegs robust, with basal three protarsomeres strongly expanded ( Fig. 10 View FIGURE 10 B): TW/BTW = 1.30. Spinal arrangement on ventral side of protibia as shown in Fig. 10 View FIGURE 10 B. Profemora wider than protibiae, and carried long hairs on ventral side. Mesotibiae feebly arcuate.

Ventrite VII simple. Ventrite VIII with a large fossa subround and shallow, slightly emarginate posteriorly ( Fig. 10 View FIGURE 10 E). Segment IX: spiculum gastrale elongate, narrowly rounded at posterior end ( Fig. 10 View FIGURE 10 F).

Aedeagus oblong in dorsal view ( Fig. 10 View FIGURE 10 G): median lobe moderately narrowed from base to apex, apical margin truncated; right apical expansion weakly sclerotized, stuck out of apical margin, acuminating to a narrowly subround apex (shape somewhat variable); parameres relatively wide, firmly attached to median lobe. Ventral operculum poorly sclerotized, limit inconspicuous, divided in apical half, two lobes asymmetrical, subrounded apically on different levels ( Fig. 10 View FIGURE 10 H). In lateral view, median lobe of about apical 1/3 obviously bent ventrad, apex thinned, and several ventrally-oriented fine setae inserted at subapex ( Fig. 10 View FIGURE 10 I). Internal stylus quite slender.

Female. Similar to male in general appearance, except for the following characters: protarsi normal, profemora without long hairs on ventral side ( Fig. 10 View FIGURE 10 C) and ventrite VIII regularly rounded posteriorly. Spermatheca ‘C’ shape ( Fig. 10 View FIGURE 10 J).

Distribution. China (Zhejiang).

Etymology. The specific epithet is from the Chinese name (Pinyin) of the type locality “Gutianshan” in Zhejiang province, China.

Remarks. This new species well resembles P. similis Schweiger from Fujian, China in general appearance and their type localities also with geographical proximity, but the new species has spiculum gastrale elongate, median lobe with apical margin truncated, and apex thinned in lateral view; while spiculum gastrale of the latter very widely subelliptic ( Fig. 4 View FIGURE 4 ), median lobe with apical margin round, and apex significantly thickened in lateral view. And this new species is also similar to P. sauteri (Portevin) , but it can be distinguished from the latter by the shape of spiculum gastrale, apical expansion of aedeagus, wider parameres and the shape of ventral operculum. In addition, it is less common to collect a large number of Ptomaphaginus specimens at one location, and we learn from the collector that there were so many logs during his collection time at Gutianshan, this kind of ecological condition might have stimulated the rising of population density.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Leiodidae

Genus

Ptomaphaginus

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