Orphnus parvus ( Wiedemann, 1823 )

Frolov, Andrey V. & Akhmetova, Lilia A., 2021, Review of the Orphninae (Coleoptera: Scarabaeidae) of Sri Lanka, with description of a new species of genus Orphnus Macleay, 1819, European Journal of Taxonomy 767 (1), pp. 40-54 : 48-52

Orphnus parvus ( Wiedemann, 1823)

Fig. 5

Geotrupes parvus Wiedemann, 1823: 6 .

Orphnus nanus Westwood, 1845: 177 (synonymy by Arrow 1912).

Orphnus parvus – Gemminger & Harold 1869: 1073 (catalogue). — Arrow 1912: 30 (catalogue). — Schmidt 1913: 80 (catalogue). — Frolov 2012: 794 (catalogue).

Differential diagnosis

Orphnus parvus is similar to O. bicolor in having the pronotum without a tubercle on base medially and endophallus with a few groups of spinules. It differs from the latter in having the parameres in dorsal view without notches basad of lateral teeth ( Fig. 5G ), shorter parameres (about 0.5 length of phallobase [ Fig. 5E ] as opposed to 0.7 length of phallobase in O. bicolor [ Fig. 4E ]), and abdominal sternite 8 medially as long as sternites 4–7 combined (as opposed to sternite 8 medially distinctly longer than sternites 4–7 combined in O. bicolor ).

Type material of Geotrupes parvus

Lectotype (here designated, Fig. 5 A – C ) INDIA • ♂; “Bengal Mai 1808 Parvus ♂ Wied. / Mus. Westerm. / TYPE”; ZMUKK .

Paralectotype INDIA • 1 ♂; “Mus. Westerm. / TYPE”; ZMUKK .

Type material of Orphnus nanus

Lectotype (here designated, Fig. 5 D – H ) INDIA • 1 ♂; “TYPE COL: 482 1/2 Orphnus nanus Westw. HOPE DEPT.OXFORD / Orphnus nanus Westw East Ind [...] Hearsey / TYPE WESTWOOD Trans. Ent. Soc. 4.1846.P.177 Coll. Hope Oxon. / […] / W / LECTOTYPUS Orphnus nanus Westw. Frolov et al. 2016 ”; ZMUKK .

Paralectotype INDIA • 1♂;“TYPE COL: 482 2/2 Orphnus nanus Westw. HOPE DEPT.OXFORD /TYPE WESTWOOD Trans. Ent. Soc. 4.1846.P.177 Coll. Hope Oxon. / Prof. Westwood’s private collection purchased from Miss Swann 1895 Collected by Gen. Hearsey in India / [9…H] / Orphnus nanus Westw ”; ZMUKK .

Additional material examined

SRI LANKA • Central Province – 2 ♂♂; Kandy ; 7°18′ N, 80°38′ E; MHNG • 1 ♀; Peradenyia ; 7°16′ N, 80°35′ E; MHNG • 1 ♂, 1 ♀; same locality data as for preceding; Friederichs S.G. leg.; MNHB • 1 ♂; same locality data as for preceding; 3 Apr. 1907; O. John leg.; ZIN • 1 ♀; Sigiriya ; 7°57′ N, 80°45′ E; Oct. 1977; MHNG • 2 ♀♀; Weragamtota ; 7°19′ N, 80°59′ E; 13 Sep. 1953; F. Keiser leg.; NHMB . – North Central Province • 1 ♀; Anuradhapura ; 8°19′ N, 80°24′ E; Friederichs S.G. leg.; MNHB • 1 ♂; Kala Oya ; 8°13′ N, 80°06′ E; 7 Nov. 1983; MNHN • 1 ♀; same locality data as for preceding; 8 Nov. 1983; MNHN • 1 ♀; Vilpattu Nat. Park, Talawila ; 8°25′ N, 80°03′ E; 9 Nov. 1983; G.S. Medvedev leg.; ZIN . – Southern Province • 1 ♀; 9 km SW of Yala ; 6°22′ N, 81°31′ E; 21 Oct. 1982; V.F. Zaitzev leg.; ZIN • 8 ♂♂; Southern Province, Bentota ; 6°26′ N, 79°60′ E; 23 Mar. 1973; G. Zimmermann leg.; MNHB • 1 ♂; Point de Galle ; 6°01′ N, 80°13′ E; MHNG • 1 ♂; Tissamaharama ; 6°17′ N, 81°17′ E; 8 Aug. 1978; P. Cabella leg.; MCSN • 2 ♂♂, 2 ♀♀; same locality data as for preceding; 30 Oct. 1983; MNHN • 2 ♂♂; Yala ; 6°22′ N, 81°31′ E; 21 Oct. 1982; G.S. Medvedev leg.; ZIN . – Western Province • 1 ♂; Colombo ; 6°56′ N, 79°51′ E; Friederichs S.G. leg.; MNHB • 1 ♂; same locality data as for preceding; Mar. 1953; G. Frey leg.; MHNG • 1 ♂, 1 ♀; Negombo ; 7°12′ N, 79°50′ E; 23 Mar. 1973; B. Huttler leg.; NMPC • 1 ♀; Wadduwa ; 6°40′ N, 79°56′ E; V. De Poll leg.; MNHN. – Sri Lanka (no exact locality) • 2 ♂♂, 1 ♀; OUM • 1 ♀; MHNG • 1 ♂; MNHB • 1 ♂; Friederichs S.G. leg.; MNHB • 1 ♂; Parry leg.; IRSNB • 1 ♂; S. Niethner leg.; MNHB .

Variation

Body length of the examined specimens varies from 6.1 to 8.2 mm (males) and 6.0 to 7.5 mm (females).

Distribution

The species is distributed rather widely throughout Sri Lanka except for the north-eastern part ( Fig. 5J ).

Figures

Fig. 5. Orphnus parvus (Wiedemann, 1823). A–C. Lectotype, ♂ (ZMUKK). D–H. Lectotype of Orphnus nanus Westwood, 1845, ♂ (ZMUKK). I. ♀ (MNHN). A–B, H–I. Habitus in dorsal view. C, E. Labels. D. Endophallus. F. Aedeagus in lateral view. G. Parameres in dorsal view. J. Distributional record map. Scale bars: A–B, H–I = 1.0 mm; D, F–G = 0.5 mm.

Fig. 4. Orphnus bicolor (Fabricius, 1801). A–F. Lectotype, ♂ (ZMUKG). G–H. ♀ (MNHN). A–B, G–H. Habitus in dorsal view. C. Labels. D. Endophallus. E. Aedeagus in lateral view. F. Parameres in dorsal view. I. Distributional record map. Scale bars: A–B, G–H = 1.0 mm; D–F = 0.5 mm.