Dichotomius (Luederwaldtinia) deyrollei ( Harold, 1869 )

Montoya-Molina, Santiago & Vaz-De, Fernando Z., 2021, Taxonomic review of the Dichotomius (Luederwaldtinia) agenor species group (Coleoptera: Scarabaeidae: Scarabaeinae), European Journal of Taxonomy 734, pp. 1-64 : 22-25

Dichotomius (Luederwaldtinia) deyrollei ( Harold, 1869)

Fig. 7 , Map 5

Pinotus deyrollei Harold, 1869: 139 (original description).

Pinotus deyrollei – Luederwaldt 1929: 99. — Blackwelder 1944: 69.

Dichotomius deyrollei – Roze 1955: 44. — Medina et al. 2001: 138. — Sarmiento & Amat 2014: 93–95.

Diagnosis

Dichotomius deyrollei is separated from the other species in the group by the following combination of characters: clypeus with central emargination displaying two rounded, dorsally angled clypeal teeth. Cephalic carina, higher than wide, antero-posteriorly flattened. Median tubercle approximately twice as high as lateral tubercles and gently inclined anteriorly, apically expanded and emarginate. Anterior portion of pronotum displaying sharp declivity, antero-medial area deeper and convex than lateral and where the longer, median tubercle can fit if head capsules is rotated dorsally.

Material examined

Lectotype (here designated) COUNTRY UNKNOWN • ♂; “Brasilia. P. Deyrollei Harold ” [white with red margins, hw]/ “Ex- Musaeo E. Harold” [white with black margins, p]/ “Museum Paris ex Coll. R. Oberthur” [green, p]/ “LECTOTYPE ♂ Pinotus deyrollei Harold des. F.Z. Vaz-de-Mello, 2014” [red with black margin, phw]; MNHN.

Paralectotype

COUNTRY UNKNOWN • 1 ♀; “Ex-Musaeo E. Harold” [white with black margins, p]/ “Museum Paris ex Coll. R. Oberthur” [green, p]/ “LECTOTYPE ♀ Pinotus deyrollei Harold des. F.Z. Vaz-de-Mello, 2014” [red with black margin, phw]; MNHN .

Additional material

COLOMBIA – Casanare • 1 spec.; Yopal, Guarataro; 600 m a.s.l.; Bosque seco Tropical ; Mar. 1996; A. Lopera leg.; ECC . – Meta • 1 spec.; PNN Tinigua, Varzea ; Mar. 1993; Ivan Jiménez leg.; ECC . – Norte de Santander • 1 ♂; 3 Km N of Chinacota; 1000 m a.s.l.; dung carrion traps, T10; 10 May 1974; S. Peck leg.; CEMT • 1 spec.; Villa Marina ; 1200 m a.s.l.; Feb. 2007; S. Ardila leg.; ECC . – Santander • 10 specs; Charalá Vda. El Salitre, Fca. Buenos Aires ; 1730 m a.s.l.; 6º32′39″ N, 73º39′6.9″ W; 11 Apr. 2016; C.Giraldo and A. León, J leg.; IAvH .

TRINIDAD • 1 ♂; B.W.I Arima Valley ; 30 Apr. 1950; CEMT • 1 ♀; 2 May 1953; CEMT .

VENEZUELA – Mérida • 2 ♀♀; Arzobispo Chacón, Mucutuy ; 1380 m a.s.l.; 8º14′18″ N, 71º17′12″ W; 13 Mar. 2015; Racconcia; CEMT . – Miranda • 1 ♂; Guarenas, Curupao ; 19 Jul. 1959; Bordon leg.; MLP • 1 ♂; Táchira, 4 Km SE of San Cristobal; 700 m a.s.l.; dung traps; 19 May 1974; S. Peck leg.; CEMT • 1 ♂; P. Natural Paramillo ; Jul. 1993; J. Blanco leg.; CEMT • 1 ♂; Rio Negro ; 25 Mar. 1984; B. Joffre leg.; CEMT • 1 ♂; 2.5 km from San Cristobal to Chorro del Indio; 1100 m a.s.l.; 7 p. m.; 1 Jul. 1989; D. Havranek leg.; BMNH . – Yaracuy • 2 ♂♂, 1 ♀; Bolivar Aroa ; 710 m a.s.l.; 10º0′0″ N, 68º0′0″ W; heces humanas; 20 Jul. 2009; M. Asmüssen, P. Colmenares and H. Martínez leg.; CEMT .

Redescription

Male

MEASUREMENTS. Length: 28.7 mm.

HEAD. Surface of anterior third rugose not reaching base of cephalic carina. Clypeus central emargination separating two rounded and dorsally angled clypeal teeth ( Fig. 7A, D ). Cephalic carina higher than wide, antero-posteriorly flattened; anterior surface with well-marked punctures. Median tubercle approximately twice as high as lateral and gently inclined anteriorly, expanded and emarginate apically. Lateral tubercles, in frontal view, with two acute apices ( Fig. 7D ). Ventral clypeal process truncate (see Fig. 2B ).

PRONOTUM. Wider than long. Pronotal disc shiny and smooth, covered by fine punctures. Antero-medial edge with strong convex declivity, which in the centre could accommodate the large frontal carina ( Fig. 7A ). Row of interrupted ocellate punctures arranged along anterior and posterior margins, fewer and scattered on lateral margins. Hypomeron anterior edge, presenting rounded ocellate punctures with long setae, punctures separated by one time the width of a puncture. Hypomeron medial disc smooth (see Fig. 2E ), without punctures. External margin bearing single row of organized long setae, all approximately of same length (see Fig. 2F ).

ABDOMEN. Mesosternum and metepisternum fully covered by dense ocellate-setigerous punctures. Metasternum setigerous punctures restricted mainly to lateral and anterior areas ( Fig. 7H ). Pilosity of anterior lobe of metasternum connecting with lateral pilosity through margin of mesocoxa ( Fig. 7H ). Lateral surface of metasternum covered by ocellate setigerous punctures separated by twice width of a puncture, setae long and dense, covering lateral surface of metasternum and metepisternal suture. Ocellate setigerous punctures along antero-lateral margins, denser at lateral areas. Pygidium surface covered by fine punctures, basal margin with scattered ocellate punctures.

ELYTRA. Interstriae microsculpture shagreened (see Fig. 2J ). Striae deeply impressed, crenulate, punctures separated by diameter of a puncture on elytral disc.

LEGS. Metacoxa posterior edge bearing single row of disorganized setigerous punctures, separated by half or less the diameter of a puncture.

PARAMERES AND LAMELLA COPULATRIX. As Fig. 7C , E–F.

Morphological variation

Females ( Fig. 7B )

As males except for the following characters:

HEAD. Surface transversely rugose, denser on anterior portion. Cephalic carina with pair of high medial tubercles.

PRONOTUM. With weak medial knob, observable in lateral view. Uninterrupted ocellate punctures throughout lateral margins. Hypomeron punctures ocellate and setigerous, equally spaced; setae longer and denser than in males. Metasternum almost completely covered by ocellate setigerous punctures, metasternal lobe smooth with fine and deeply impressed punctures.

ELYTRA. Smooth, with scattered fine punctures.

ABDOMEN. Sternites dense ocellate punctures covering anterior margin.

Remarks

This species occurs in Colombia and Venezuela. The distribution of the species closely follows that of the Andes Mountains. The original description notes that the type specimens were from “ Brésil ”, without any other specification of the locality. However, as far as we know this Andean species does not occur in Brazil.

Figures

Fig. 7. Dichotomius deyrollei (Harold, 1869). A–B. Dorsal habitus. A. ♂. B. ♀. C. Lateral view of the aedeagus. D. Anterior view of the head cephalic carina. E. Ventral view of the aedeagus. F–G. Lamella copulatrix. H. Metasternum dense pilosity.

Fig. 2. General characters that help differentiate the species of the Dichotomius (Luederwaldtinia) agenor species group. A–D. Ventral clypeal process. A. Cordate as in D. agenor (Harold, 1869). B. Truncate as in D. sagittarius (Harold, 1869) stat. rev. C. Bifurcate as in D. belus (Harold, 1880). D. Cylindrical as in D. henripittieri sp. nov. E–F. Hypomeral characters. E. Medial disc smooth, lateral margin with multiple rows of setae as in D. amplicollis (Harold, 1869). F. Medial disc punctate, lateral margin with single row of setae as in D. tristis (Luederwaldt, 1923). G–H. Metasternum characters. G. Setigerous punctures from the medial and lateral edges joining throughout the margin of the mesocaxa as in D. enioi sp. nov. H. Setigerous punctures from the medial and lateral edges not joining throughout the margin of the mesocaxa as in D. centralis (Harold, 1869). I–J. Elytra interstriae. I. Smooth as in D. amplicollis. J. Shagreened as in D. agenor.