Pareuryaptus morosus
Creators: name: Fedorenko, D. N.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Carabidae
Pareuryaptus
Pareuryaptus morosus

description: 8. Pareuryaptus morosus (Tschitschérine, 1900)
Figs 13, 21, 29, 33, 90–91, 118–123, 127–130, 133– 136, 144–147.
Tschitschérine, 1900: 162, 164 (Trigonotoma; ‘Cambodge’); Lesne, 1904: 78; Jedlička, 1962: 315; Dubault et al., 2008: 206, 210; Roux et al., 2016: 58. — namptap Kirschenhofer, 2011: 36 (Mt Phou Phakhao, Laos); Roux et al., 2016: 68, syn.n. — adoxus Tschitschérine, 1900: 162 (Trigonotoma; Saigon); Jedlička, 1962: 315; Dubault et al., 2008: 206; Roux et al., 2016: 52; Li et al., 2022: 3, syn.n. — loeffleri Kirschenhofer, 2007: 9 (Trigonotoma; Doi Pha Hom Pok, N. Thailand); Dubault et al., 2008: 206, 210; Roux et al., 2016: 74, syn.n. —? cyanellus Tschitschérine, 1900: 162, 165 (Trigonotoma; Chau Doc, southern Vietnam); Dubault et al., 2008: 206, 209; Roux et al., 2016: 74.
MATERIAL. P. morosus: ♂, 4♀♀ (SIEE), Vietnam, Dong Nai Province, Cat Tien National Park, at light HQL 450, 17.V.– 18.VI.2005 (D. Fedorenko); ♂ (SIEE), Thailand, Ta Phraya District, La Lu Nat. Park, h = 132 m, at light, 14°02′36″N, 102°33′13″E, 17.V.2010 (V.K. Zinchenko); ♂ (ISEA), same data, except for 14°02′31.3″N, 102°34′04.6″E, 15–19.V.2010 (A.V. Korshunov); ♂ (SIEE), Prov. Nakhon Ratchasima (Korat): Saeng Sang, Lam Sae Dam, National Park Tha Plan, h = 250 m, 14°16′40″N / 102°25′28.5″E, 23–26.VI.2013 (A.V. Korshunov). — P. adoxus: 4♂♂, 13♀♀ (SIEE), Vietnam, Cat Tien National Park, at light HQL 450, various dates between 17.V. and 19.VI.2005 (D. Fedorenko); 2♂♂, 3♀♀ (SIEE), Ba Ria – Vung Tau Province, Xuen Moc Nature Reserve, at light, 17.V.1991 (N. Belyaeva); ♀ (ZIN), Cochinchine, Cap St. Jacques; ♂ (ZIN), ‘ Trigonotoma / curtula Chaud / Cochinchine’; 2♀♀ without labels except ‘к[оллекциЯ]. Чичерина [c. Tshitsherin]’; ♂, ‘ Saïgon / coll./ Lésiléuc’.
P. cyanellus?: ♀ (ISEA), Thailand, Ta Phraya Distr., La Lu Natn. Park, h = 122 m, 14°02′31.3″N, 102°34′04.6″E, 15– 19.V.2010 (A.V. Korshunov); ♂, Prov. Nakhon Ratchasima (Korat): Saeng Sang, Lam Sae Dam, National Park Tha Plan, h= 250 m, 14°16′40″N / 102°25′28.5″E, 7–8.VI.2010 (A.V. Korshunov).
Aedeagus and internal sac examined in eight (four of P. adoxus and four of P. morosus) or six (three of P. adoxus and three of P. morosus) males, respectively; genitalia and reproductive tract examined in two females (of P. adoxus).
DIAGNOSIS. As for P. chalceolus, except for body medium-sized, terminal maxillary palpomere slender and subfusiform, and elytral microsculpture consisting of moderately to very transverse meshes.
REDESCRIPTION. As for P. chalceolus, except as follows: BL 11.7–15.9 mm. Elytra with more or less distinct greenish luster, elytral interval 9 same coloured or almost so; sometimes pronotum with slight violaceous luster along sides and base. Pronotum as in Figs 90–91: more finely punctate in general, mostly with few or no punctures inside lateral groove. Basal foveae moderately wide and less deep, with outer sulcus and shallow inner sulcus traceable, sometimes narrow and deep. Elytral intervals nearly flat to convex. Posterior inclination of prosternal process rather narrow subconvex to subcostate. Propleura nearly smooth, mostly with 0–2, rarely up to eight, coarse punctures.
Aedeagus (Figs 118–123, 127–130, 133–136, 144–147): internals sac at a slightly acute angle with apical half of aedeagus, its distal part moderately long; preapical bulb large, proximal dorsal vesicle missing, proximal one small yet distinct, while varying slightly in size, at a distance from dorsal sclerite.
GEOGRAPHIC DISTRIBUTION. Thailand to Vietnam.
HABITATS AND HABITS. No data except that all the specimens examined were taken at light at low altitudes. In the Cat Tien National Park, this light was positioned at the edge of broad-leaved monsoon forest near the Dong Nai river.
COMMENTS. Pareuryaptus morosus, P. adoxus and P. cyanellus were described together based on the holotypes only, female from Cambodia or male from Saigon, or male from Chau Doc, respectively. According to the descriptions, these three, especially the former two, were very similar to each other and originated from fairly close localities. Flat elytral intervals, combined with body barely larger, 14 mm in length (vs. convex intervals, in couple with BL 13 mm), were only the character combination to differentiate P. adoxus from P. morosus.
My comparison between numerous specimens from the Cat Tien NP led me primarily to the conclusion that there existed separate two, larger (BL 13.6–15.9 mm) or smaller (BL 11.7–13.3 mm), species. However, aedeagi, including internal sacs, re-examined are very similar in both and the other differences are subtle. These only concern body ratios (Table) and may have come from differences between the specimens measured in body size. Other two morphometrics, mp4L/W and mp3L/mp4L, are more different, while varying between specimens of smaller size (P. morosus) from different localities such as southern Vietnam, Laos, and Thailand.
Pareuryaptus loeffleri and P. namptap are here considered as conspecific with P. morosus, as they have no significant differences from P. adoxus or P. morosus, respectively. Both were described as distinctive from either P. aethiops or P. curtulus, yet by no comparison with similar species such as P. adoxus or P. morosus, or P. chalceolus. Besides, the terminal maxillary palpomere of P. namptap as originally illustrated in Kirschenhofer [2011: Abb.4] somewhat disagrees with that illustrated in Roux et al. [2016: 69]. It is slightly longer, mp4L/W 4.1 (vs. 3.7), thus being hardly different from those of the examined specimens of P. morosus from the Cat Tien NP (Tab. 4) or China [Li et al., 2022]. Similar values of the ratio (mp4L/W 3.3–3.6) are peculiar to some specimens from Thailand, which are not different from the other examined ones of P. morosus in appearance, as well as in endophallic characters. Finally, Dubault et al. [2008] demonstrated that slightly bluish body dorsum of the holotype of P. cyanellus was an artifact, which reduced the character combination to diagnose P. cyanellus from P. morosus to the only character, the palpomere 4 being by comparison broadest, mp4L/W 3.1. This might suggest that P. cyanellus and P. morosus are conspecific, with their differently shaped terminal maxillary palpomeres coming from high individual or geographical variability of one species.
The name P. morosus is here selected as valid since the holotype of P. adoxus has not been found in ZIN Collection, T.S. Tshitsherin Collection included, while all the four specimens of P. adoxus from this collection being misidentified as Trigonotoma curtula.
description: Published as part of Fedorenko, D. N., 2024, Notes on Trigonotoma and Pareuryaptus (Coleoptera: Carabidae: Pterostichini) from Vietnam, pp. 43-71 in Russian Entomological Journal 33 (1) on pages 66-67, DOI: 10.15298/rusentj.33.1.05, http://zenodo.org/record/14162968