Parachorius longipenis 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 : 129

Parachorius longipenis Tarasov new species

( Figs. 15 , 26D )

urn:lsid:zoobank.org:act:9BE1948F-A942-492A-A07A-278B88EE090D

Type locality. Hoa Binh, Vietnam.

Etymology. The name of this species derives from the Latin words "longus" and "penis" reflecting the fact that this species has a relatively elongated penis in comparison to the similar species P. solodovnikovi .

Distribution. The species is known from Vietnam, Laos, and Thailand. It is abundant in collections compared to other species of Parachorius and therefore, likely widespread in Indochina.

Diagnosis. This species is most similar to P. nudus , P. solodovnikovi , and P. peninsularis . From them and all other Parachorius , it can be separated by (1) protibia with first tooth spatulate, bent downward and notably larger than second tooth, (2) first tooth also looks bifurcated as it merged with denticles located between first and second teeth, (3) aedeagal parameres elongate with horn-like upper lobes dorsally.

Description. Body. Body black, length 3.8–5.6 mm. Elytra 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 0.3– 1.0 puncture diameter(s). Pronotum in anterior-posterior direction notably shorter than elytra.

Elytra. Elytra covered with sparse punctures.

Wings. Wings normally developed.

Legs. Profemora with almost straight or sinuate anterior margin. Protibia apical spur reaching protarsomere 2. First tooth notably modified in males, spatulate, bent downward and notably larger than second tooth, with which it is almost merged; first tooth may look bifurcate because it is merged with denticles located between first and second teeth. Metafemoral posterior margin not serrate, it varies from simple to dilate with produced angle in basal half of metafemur. Metatibia produced in small angle apically, slightly sinuate, inner margin denticulate with relatively small teeth.

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

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

Holotype. Male ( Fig. 15F ). Profemur with sinuate anterior margin. First tooth bifurcate. Metafemoral posterior margin dilated.

Material examined. Holotype: Vietnam : 1 male, " Hoa Binh [,] Tonkin [northern Vietnam,] [leg.] de Cooman / 57 / HOLOTYPE Parachorius longipenis S. Tarasov det. 2010", 20°49.7'N, 105°20'E ( MNHN) . Paratypes (45 males): 1 male paratype, Laos ou Cambodge, on 1911 ( Bonnote ) ( MNHN) ; Laos: 1 male paratype, Houayang National Park , approximately 15 km N of Vientiane, ANIMT site 1225, carrion trap (squid), 18°5.923'N, 102°40.128' E, 190 m, tropical handwood forest, on 2-19/vi/2008 (J. Pedersen, M. Thayer, A. Newton) ( FMNH) ; 1 male paratype, Vientiane, Houayang forest , 18°5.86'N, 102°40.547'E, 200 m, disturbed forest, on 12–19/vi/2008 (A. Newton, M. Thayer) ( FMNH) ; Thailand: 2 male paratypes, Chaiyaphum province, Thep Sathit district, Pa Him Ngam , 15°42'N, 101°23'E, on 1/ix/2007 (H. Enghoff) ( ZMUC) ; 1 male paratype, Prae Siam, on 1929-33 (Poul Fogh) ( ZMUC) ; Vietnam: 1 male paratype, Bac Kan Province, Ba Be National Park , 22°25'3"N, 105°37'59"E, 290 m, Limestone Karst, disturbed forest, on 4/vii–6/ix/2005 (L. Hayes) ( OUMNH) ; 1 male paratype, Bac Kan Province, Ba Be National Park , 22°25'2"N, 105°38'1"E, 315 m, Limestone Karst, disturbed forest, on 4/vii–6/ix/2005 (L. Hayes) ( OUMNH) ; 1 male paratype, Dong Nai Province , Nam Cat Tien National Park , 11°25.1'N, 107°25.6'E, forest, on 21/v–16/vi/2005 (D. Fedorenko) ( ZMUM) 13 male paratypes, Hoa Binh , Tonkin [northern Vietnam], 20°49.7'N, 105°20'E, on [date specified only for two specimens: 1923 and 1928] (A. De Cooman) ( MNHN) ; 1 male paratype, Tonkin [northern Vietnam] Central Environs de Tuyen-quan [g], 21°49'N, 105°13'E, on vii– ix/1901 (A. Weiss) ( MNHN) ; Laos: 16 male paratypes, Houayang National Park , approximately 15 km N of Vientiane, 18°5.889'N, 102°40.521'E, 180 m, secondary rain forest, on 19–20/vi/2008 (A. Solodovnikov, J. Pedersen) ( ZMUC) ; Vietnam: 6 male paratypes, Hoa Binh , Tonkin [northern Vietnam], 20°49.7'N, 105°20'E, on [date specified only for two specimens: 1923 and 1928] (A. De Cooman) ( MNHN) .

Figures

FIGURE 15. Morphology of Parachorius longipenis. (A) aedeagus, lateral view (paratype, Vietnam). (B) aedeagus, lateral view (paratype, Thailnd). (C) aedeagus, lateral view (paratype, Laos) (D) aedeagus, lateral view (holotype) (E) aedeagus. (F) habitus (male, holotype). (G) right metafemur (male, holotype). (H) right metafemur (male, paratype, Vietnam). (I) right metafemur (male, paratype, Thailand). (J) left protibia (flipped from original, male, holotype). (K) protibia (female, paratype, Laos).

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.