Parachorius humeralis ( Arrow, 1907 ) Tarasov, 2017

Tarasov, Sergei, 2017, A cybertaxonomic revision of the new dung beetle tribe Parachoriini (Coleoptera: Scarabaeidae: Scarabaeinae) and its phylogenetic assessment using molecular and morphological data, Zootaxa 4329 (2), pp. 101-149 : 126-127

Parachorius humeralis ( Arrow, 1907) new combination

( Figs. 13 , 26B )

Cassolus humeralis Arrow, 1907: 416

Cassolus humeralis ; Gillet 1911: 39

Cassolus humeralis ; Arrow 1931: 361

Cassolus humeralis ; Balthasar 1963: 262 Cassolus humeralis ; Kryzhanovsky & Medvedev 1966: 394 Cassolus humeralis ; Bacchus 1978: 104

Cassolus humeralis ; Paulian 1980: 57

Type locality. Assam Sudiya [ Assa , northeastern India].

Distribution. The species is known only from northeastern India (Sikkim, Assam, Meghalaya).

Diagnosis. This species is most similar to P. asymmetricus from which it differs by the symmetrical aedeagus as well as first and second teeth of protibia being distinctly separated from each other. From other Parachorius species P. humeralis can be separated by (1) elytron usually bearing yellow humeral spot (rarely not), (2) aedeagus shape, (3) apical half of metafemoral posterior margin from slightly to largely dilated and produced in sharp or rounded angle, and (4) dilation of metafemur steeply reducing near apex.

Description. Body. Body, black or brown, dark, length 3.8–5.0 mm. Elytra with yellow humeral spot or uniformly colored.

Head. Clypeus with two teeth, outer margin of each tooth distinctly notched basally.

Pronotum. Pronotum rounded laterally. Frontal angles rounded. Disc covered with punctures separated by 0.5– 2.0 puncture diameter(s). Pronotum in anterior-posterior direction notably shorter than elytra.

Elytra. Elytra covered with sparse punctures.

Wings. Wings normally developed.

Legs. Profemur with almost straight or sinuate anterior margin. Protibia with apical spur approximately reaching middle of protarsomere 3. First tooth notably modified in males, approximately twice as wide as second tooth; first and second teeth distinctly separated from each other; first tooth distinctly separated from denticles located between first and second teeth. Metafemoral posterior margin not serrate, largely dilated in apical half of metafemur and produced in sharp angle or slightly dilated in apical forth of metafemur and produced in rounded angle preapically; dilation gradually reducing preapically. Metatibia slightly sinuate, inner margin not denticulate, produced in small angle apically.

Metasternum. Transverse basal ridge of metasternum reduced and extremely short.

Aedeagus. Parameres symmetrical, with horn-like upper lobes dorsally.

Material examined. Lectotype: India: 1 male, "? / LECTOTYPE / Doherty / Assam Sudiya / 60468 / Fry Coll. 1905-100 / Cassolus humeralis / Arrow type? A. a. m., 1907 / Cassolus humeralis Arrow ? M.E. Bacchus det 1975. LECTOTYPE", 27°50'N, 95°45'E (BMNH). Paralectotypes: 1 male, 1 female, Assam, Patkai Hills (BMNH). 1 male, Darjiling, Gopaldhara, Runbong Valley, Sikkim, British Museum 1922-307, 27°2.1'N, 88°15.8'E, on vii/1920 (H. Stevens) (BMNH). 1 male, Gopaldhara, Runbong Valley, Sikkim, 1916-218, 27°2.1'N, 88°15.8'E (H. Stevens) (ISNB). 1 male, Gopaldhara, Runbong Valley, Sikkim, 1916-218, 27°2.1'N, 88°15.8'E (H. Stevens) (BMNH). 1 male, Gopaldhara, Runbong Valley, Sikkim, British Museum 1922-307, 27°2.1'N, 88°15.8'E (H. Stevens) (BMNH). 1 male, Assam, Bhalukpong, 27°2'N, 92°35'E, 150 m, on 26/v–3/vi/2009 (P. Pocholatko) (BMNH). 1 male, Darjeeling, Mungpo, B.M. 1931-452, 26°58.3'N, 88°22.3'E (M. Cameron) (BMNH). 1 male, Meghalaya, SW of Cherrapunjee, 25°13.5'N, 91°40'E, 900 m, on 5–24/v/2005 (P. Pocholatko) (BMNH). 1 male, Shilong, 25°33.9'N, 91°53' E, 6/iv/1918, (BMNH). 1 male, W Bengal, Darjeeling, North Point, No 890, 27°2.1'N, 88°15.8'E, 1500 m, from traps with carcass, 23/x/1967 (G. Topal) (ZIN).

Figures

FIGURE 13. Morphology of Parachorius humeralis. (A – B) aedeagus (Darjeeling). (C) aedeagus. (D) habitus (male, holotype). (E) habitus (male). (F – H) right metafemur (male). (I) protibia (female). (J) protibia (male).

FIGURE 26. Distribution maps of Parachorius species. (A) Parachorius hookeri. (B) Parachorius humeralis. (C) Parachorius javanus. (D) Parachorius longipenis. (E) Parachorius maruyamai. (F) Parachorius newthayerae. Type locality — type locality of species (holotype or lectotype); Type. Collection data — localities of type specimens associated with species (paratypes or paralectotypes); Collection data — localities of other specimens examined in this study.