Onthophagus fuscus Boucomont, 1932

Joaqui, Tatiana, Moctezuma, Victor, Sánchez-Huerta, José Luis & Escobar, Federico, 2019, The Onthophagus fuscus (Coleoptera: Scarabaeidae) species complex: an update and the description of a new species, Zootaxa 4555 (2), pp. 151-186 : 155-158

Onthophagus fuscus Boucomont, 1932

Figs. 1–2, 18–20 .

Type material. Not examined.

Non-type material examined (73 males, 147 females). 1 male: “ México, Cerro Blanco, Mcpo. de Suchil, Edo. de Durango, 29–30/IX/1975. G. y V. Halffter cols. Cebo excremento de venado cola blanca” ( GHC) ; 2 males, 4 females: “ México, La Michilía, Edo. de Durango, 27/VII/1978. R. E. Halffter col. Cebo excremento de venado” ( GHC: 4 females; VMC: 2 males) ; 1 male, 7 females: “ México, La Michilía, Edo. de Durango, SW Vicente Guerrero. 1–6/VII/1978. G. y V. Halffter cols. Colectas en Rancho La Peña. Cebo carroña” ( GHC: 1 male, 6 females; VMC: 1 female) ; 1 male: “ México, La Michilía, Edo. de Durango, 22/VIII/81, V. Halffter col.” ( GHC) ; 2 males, 1 female: “ México, La Michilía, Edo. de Durango, Rancho de La Peña , VIII/81 ” ( GHC: 1 male; VMC: 1 male, 1 female) ; 9 males, 8 females: “ México, La Michilía, Edo. de Durango, VIII-IX/87, Anduaga/Santos” ( IEXA) ; 1 male, 1 female: “ México, La Michilía, Edo. de Durango, VIII/90. R. Terrón. 2600 m ” ( IEXA) ; 19 males, 58 females: “ México, La Michilía, Edo. de Durango, 6/IX-10/XII/86. Encinar. NTP-80.” ( IEXA) ; 24 males, 61 females: “ México, La Michilía, Edo. de Durango, 4/VII. 4/IX/ 86. 2450 m.” ( IEXA) ; 1 female: “ México, La Michilía, Edo. de Durango, alt. 2400 m.” ( IEXA) ; 5 males, 6 females: “ México, La Michilía, Edo. de Durango, VII-86.” ( IEXA) ; 4 males, 4 females: “ México, Zacatecas, Tlaltenango , 2591 m, 27/VII/2003. G. Nogueira col.” ( IEXA) ; 4 males, 3 females: “ México, Aguascalientes, Sierra Fría, Los Encinos , 7/VIII/91. Alt. 2500 m. G. Nogueira, col.” ( IEXA) ; 1 male: “ México, Jalisco, Volcán de Tequila. 2150 m. 10/VIII/94. G. Nogueira col.” ( IEXA) .

……continued on the next page Remarks. Length: 8.9 ± 0.7 mm. Zunino & Halffter (1988) suggested that O. fuscus had four subspecies with slight differences: O. fuscus canescens , O. fuscus fuscus , O. fuscus mycetorum , and O. fuscus parafuscus . In this work, we highlight a set of differences in features as color, pubescence, clypeal and frontal carinae, pronotal prominence, clypeus shape, genae, aedeagus, lamella copulatrix, female genital sclerites, and geographical distribution of these taxa ( Table 1, Figs. 18 – 20 ). This set of features led us to consider all the subspecies proposed by Zunino & Halffter (1988) as different species that can be easily diagnosed, but closely related.

Figures

FIGURE 18. Aedeagus: A, Onthophagus fuscus; B, O. canescens; C, O. mycetorum; D, O. parafuscus; E, O. pseudofuscus. Redrawn from Zunino & Halffter (1988).

FIGURE 19. Lamella copulatrix: A, O. fuscus; B, O. canescens; C, O. mycetorum; D, O. parafuscus; E, O. pseudofuscus. Redrawn from Zunino & Halffter (1988).

FIGURE 20. Female genitalia: A, O. fuscus; B, O. canescens; C, O. mycetorum; D, O. parafuscus. Redrawn from Zunino & Halffter (1988).