Dichotomius (Luederwaldtinia) agenor ( 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: 8-12

publication ID

https://doi.org/10.5852/ejt.2021.734.1233

publication LSID

lsid:zoobank.org:pub:663A0C2D-E3CF-4B0C-8BA1-566B174829A2

DOI

http://doi.org/10.5281/zenodo.4545841

persistent identifier

http://treatment.plazi.org/id/03850669-FF97-FFC5-FE7E-212238D9CD9E

treatment provided by

Plazi

scientific name

Dichotomius (Luederwaldtinia) agenor ( Harold, 1869 )
status

 

Dichotomius (Luederwaldtinia) agenor ( Harold, 1869)  

Fig. 3 View Fig , Map 1

Pinotus agenor Harold, 1869: 141   (original description).

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

Dichotomius agenor   – Howden & Young 1981: 13. — Medina et al. 2001: 138. — Ratcliffe 2002: 15 — Sarmiento & Amat 2014: 89–90.

Diagnosis

Dichotomius agenor   is separated from the other species in the group by the following combination of characters: large male fronto-clypeal carina with lower part wider than high, with median tubercle bifurcate apically, concave between central and lateral tubercles. Pronotum with pronounced, truncate anterior declivity, when viewed laterally. External margin of hypomeron bearing multiple rows of disorganized long setae, all approximately the same length, that can be seen in dorsal view. Posterior edge of metacoxa bearing two rows of disorganized ocellate punctures, separated by half the diameter of a puncture.

Material examined

Lectotype (here designated) COLOMBIA • ♂; “Columbia. P Agenor” [white with red margins, hw] / “ Ex-Musaeo E.Harold ” [white with black margins, p]/ “LECTOTYPE ♂ Pinotus agenor Harold   des. F.Z. Vaz-de-Mello, 2014” [red with black margin, phw]; MNHN.  

Paralectotypes (1 ♂, 1 ♀)

COLOMBIA • 1 ♂; “ Agenor Colomb.” [white, hw]/ “Ex-Musaeo E. Harold” [white with black margins, p]/ “ ♂ Pinotus agenor Harold   des. F.Z. Vaz-de-Mello, 2014” [yellow with black margin, phw]; MNHN •   1 ♀; “ Agenor Colomb.” [white, hw]/ “Ex-Musaeo E. Harold” [white with black margins, p]/ “ ♀ Pinotus   agenor Harold des. F.Z. Vaz-de-Mello, 2014” [yellow with black margin, phw]; MNHN.  

Additional material

COLOMBIA – Antioquia • 1 spec.; Sonsón, San Miguel, Fca. La Rica ; 160–250 m a.s.l.; 21 Aug. 2006; J. Arias leg.; IAvH   1 ♂; Antioquia; BMNH 5438   . – Atlántico • 1 spec.; Juan de Acosta, tierra arena ; 250 m a.s.l.; 10º16′28″ N, 75º57′1.3″; 21–22 Sep. 2009; J. Rangel and O. Blanco leg.; IAvH GoogleMaps   • 3 specs; Piojó, Fca. La Cristalina ; 50 m a.s.l.; 10º44′59″ N, 75º9′42″ W; bosque seco tropical; Aug. 2015; A. Lopera and N. Castillo leg.; IAvH • GoogleMaps   1 spec.; Piojó , Fca. La Cristalina ; 50 m a.s.l.; 10º44′59″ N, 75º9′42″ W; bosque seco tropical; Aug. 2015; A. Lopera and N. Castillo leg.; ECC. GoogleMaps   Bolivar • 1 spec.; Isla de Tierra Bomba ; 100 m a.s.l.; 10º21′36″ N, 75º34′30″ W; Aug. 1996; F. Escobar leg.; ECC GoogleMaps   • 9 specs.; San Juan de Nepomuceno , Fca. Mis Deseos ; 482 m a.s.l.; 9º55′8.4″ N, 75º9′33.7″ W; bosque seco tropical; Aug. 2015; A. Lopera and N. Castillo leg.; IAvH GoogleMaps   • 1 spec.; San Juan de Nepomuceno , Fca. Mis Deseos ; 482 m a.s.l.; 9º55′8.4″ N, 75º9′33.7″ W; bosque seco tropical; Aug. 2015; A. Lopera and N. Castillo leg.; ECC GoogleMaps   • 1 spec.; Zambrano , Had. Moterrey ; 120 m a.s.l.; 9º37′48″ N, 74º54′44″ W; Aug. 1996; F. Escobar leg.; ECC. GoogleMaps   – Caldas • 1 ♂, 2 ♀♀; Guarinocitos; 200 m a.s.l.; 5º22′00.6″ N, 74º47′34.6″ W; Aug. 2015; S. Montoya-M. leg.; CEMT • GoogleMaps   1 ♂; Norcasia , Vda. San Roque-Reserva Rio Natural Manso ; 220 m a.s.l.; 5º39′40″ N, 74º46′98″ W; bosque; 1 Aug. 2004; L. Arango and A. Montes leg.; ECC GoogleMaps   . – Caquetá • 1 ♂; Yari ; 16 Oct. 1986; CEMT   . – Cesar • 110 specs; Codazzi ; 165 m a.s.l.; 9º58′42″ N, 73º56′44″ W; 17 May 2016; C. Giraldo and A. León, J leg.; MUSENUV GoogleMaps   1 spec.; Valledupar ; 160 m a.s.l.; 10º21.747′ N, 73º23.26′ W; Potrero; Aug. 2013; S. Montoya leg.; ECC GoogleMaps   1 spec.; Velledupar, Ecoparque Los Besotes ; 500 m a.s.l.; 10º34′30″ N, 73º18′38″ W; Dec. 2002; F. Forero leg.; IAvH GoogleMaps   . – Cordoba • 1 spec.; Monteria, Las Palmeras ; 8º30′37.1″ N, 76º6′12.9″ W; bosque; Sep. 2011 spec.; A. Vargas-Pérez leg.; ECC GoogleMaps   1 spec.; Monteria, Vda. Sierra Chiquita ; 125 m a.s.l.; 8º44′22″ N, 75º54′40″ W; bosque seco tropical; Dec. 2011 spec.; R. Leidys Murillo leg.; ECC GoogleMaps   8 specs; Monteria, Vda. Sierra Chiquita ; 125 m a.s.l.; 8º44′22″ N, 75º54′40″ W; bosque seco tropical; Dec. 2011 spec.; R. Leidys Murillo leg.; IAvH GoogleMaps   1 spec.; Tierra Alta, Vereda Tuis-Tuis, Reserva Tuis-Tuis ; 125 m a.s.l.; 8º2′23.7″ N, 76º5′59.6″ W; Apr. 2011 spec.; R. Leidys Murillo leg.; ECC GoogleMaps   . – Cundinamarca • 2 ♀♀; San Juan de Rio Seco ; bosque seco tropical; 1300 m a.s.l.; 12 Oct. 1997; Pulido-Riveros leg.; ECC   2 specs; Bogotá; Nevinson leg.; BMNH 1918-14   . – Huila • 7 specs; Desierto de la Tatacoa; 480 m a.s.l.; 3º13′50″ N, 75º9′25″ W; Nov. 2012; D. Martínez leg.; IAvH GoogleMaps   . – La Guajira • 252 specs; Jagua del Pilar ; 181 m a.s.l.; 10º30.88′ N, 73º5.31′ W; Aug. 2013; S. Montoya leg.; IAvH GoogleMaps   282 specs; Uribia, PNN La Macuira- Corregimiento de Nazareth Kajashiwou ; 70 m a.s.l.; 12º11′37″ N, 71º21′30″ W; bosque seco tropical; 19 May 2014; C. Medina and A. González leg.; IAvH GoogleMaps   . – Magdalena • 1 spec.; Santa Marta, PNN Sierra Nevada , C. Minca , Cuenca del rio Gaira , Sector Pozo Azúl ; 740 m a.s.l.; 11º8′17″ N, 74º8′29″ W; 1–2 Aug. 2004; H. García and D. Ospino leg.; ECC GoogleMaps   1 spec.; Santa Marta, PNN Sierra Nevada ; C. Gaira leg.; 50 m a.s.l.; 11º10′26″ N, 74º10′37″ W; Jul. 2004; H. García leg.; ECC GoogleMaps   2 ♂♂, 2 ♀♀; PNN Tayrona Neguanje ; 155 m a.s.l.; 11º17′41″ N, 74º06′15″ W; bosque seco excr. humano; Sep. 1996; F. Escobar leg.; CEMT GoogleMaps   2 ♂♂; Stn Martha Colombia ; Nevinson leg.; BMNH 1918-14   . – Meta • 2 ♀♀; Santander, Encino, Sector La Gorda, Finca San Agustín ; Pastizal ; 2000 m a.s.l.; trampa de excremento humano; Dec. 2009; J. Arias-Buriticá leg.; CEMT.   – Sucre • 94 specs; San Benito Abad, Vda. Santiago Apostol ; 30 m a.s.l.; 9º2′19″ N, 75º54′25″ W; Palmar leg.; Oct. 2009; L.E. Franco leg.; IAvH GoogleMaps   1 spec.; San Benito Abad, Vda. Santiago Apostol ; 30 m a.s.l.; 9º2′19″ N, 75º54′25″ W; Palmar leg.; Oct. 2009; L.E. Franco; ECC GoogleMaps   3 specs; Colosó, Montes de María, Sector La Cascada , Estación Primatológica ; 28–30 Apr. 2009; L.E. Franco leg.; IAvH   . – Tolima • 20 specs; Alvarado, Fca. La Brasilia ; 537 m a.s.l.; 5º11′34″ N, 75º39′33″ W; 7 Mar. 2016; C. Giraldo and A. León J leg.; MUSENUV GoogleMaps   1 ♂; Armero ; bosque; 260 m a.s.l.; Nov. 2000; J. Noriega leg.; CEMT   1 ♂; Guayabal. Armero. Oct. 2000; J. Noriega leg.; CEMT   1 ♀; Armero, Cerros de Santo Tomás ; 250 m a.s.l.; Nov. 2000; J. Noriega leg.; CEMT   1 spec.; Armero, Guayabal, Cerros de Santo Tomás ; 300 m a.s.l.; 5º5′38″ N, 75º46′4″ W; bosque de cerro; Nov. 1995; F. Escobar leg.; ECC GoogleMaps   183 specs; Armero, Guayabal, Cerros de Santo Tomás ; 300 m a.s.l.; 5º5′38″ N, 75º46′4″ W; bosque de cerro; Nov. 1995; F. Escobar leg.; IAvH GoogleMaps   1 ♂; Armero, Guayabal, Mendez Had. Cardonal ; 300 m a.s.l.; 5º5′38″ N, 74º46′39″ W; excr. humano; Borde Bo-Po [border between forest-pasture]; Sep. 1995; F. Escobar leg.; CEMT GoogleMaps   45 specs; Armero, Guayabal, Mendez Had. Cardonal ; 300 m a.s.l.; 5º5′38″ N, 74º46′39″ W; excr. humano; Borde Bo-Po; Sep. 1995; F. Escobar leg.; IAvH GoogleMaps   1 ♀; Armero, Guayabal Mendez Had. Bremen ; 300 m a.s.l.; 5º5′31″ N, 74º45′81″ W; excr. humano; Nov. 1995; F. Escobar leg.; CEMT   • 116 specs; Armero, Guayabal Mendez Had. Bremen; 300 m a.s.l.; 5º5′31″ N, 74º45′81″ W; excr. humano; Nov. 1995; F. Escobar leg.; IAvH   . – Valle del Cauca • 1 spec.; Buga, Fca. Los Chagualos ; 29 Feb. 2016; C. Giraldo and A. León, J; MUSENUV   1 ♀; Colombia, Nevinson leg.; BMNH 1918-14   .

PANAMA • 3 ♂♂, 2 ♀♀; Panamá City, Cerro Ancon ; 8º57′ N, 79º33′ W; light; Apr. 2014; B. Becker leg.; CEMT GoogleMaps   1 ♂; La Chorrera , Panamá; BMNH 98-146   .

VENEZUELA – Mérida • 4 ♂♂, 4 ♀♀; Libertador, Meseta de Zumba, Had. Los Arcos ; 1181 m a.s.l.; 8º33′14″ N, 71º13′20″ W; pitfall human faeces; 6 May 2016; R. Acconcia and J. Gámez leg.; CEMT GoogleMaps   2 ♂♂; Merida ( Seilbahn ); 220 m a.s.l.; 11 Apr. 1995; Hornburg and Krause leg.; CEMT   . – Táchira • 3 ♂♂, 3 ♀♀; Libertador, San Joaquín de Navay ; 200 m a.s.l.; 7.6622º N, 71.7104º W; Aug. 2006; T. Good leg.; CEMT GoogleMaps   . – Yaracuy • 1 ♀; Bolivar Aroa ; 468 m a.s.l.; 10º0′0″ N, 68º0′0″ W; heces humanas; 21 Jul. 2009; M. Asmüssen, P. Colmenares and H. Martínez leg.; CEMT GoogleMaps   2 ♂♂, 4 ♀♀; Venez [Venezuela]; Nevinson leg. BMNH 1918-14   2 ♂♂; Veneza. [Venezuela]; Fry leg.; BMNH 1905-100   1 ♂; Nevinson leg.; BMNH 1918-14   1 ♂; BMNH 3521   .

Redescription

Male

MEASUREMENTS. Length: 20.5 mm.

HEAD. Anterior surface rugose, not extending posteriorly to base of cephalic carina. Cephalic carina wider than high, anterior surface smooth, dorsally concave between central and lateral tubercles ( Fig. 3C View Fig );

median tubercle twice as high as lateral tubercles, conical in shape and apically emarginate. Interocular space shiny, smooth. Ventral clypeal process cordate (see Fig. 2A View Fig ).

PRONOTUM. Wider than long and wider than elytra. Pronotal disc shiny and smooth, lacking deep punctures, with at most fine punctures. Anterior declivity pronounced and truncate when viewed laterally ( Fig. 3D View Fig ). Ocellate punctures present along anterior and posterior margins, few scattered ocellate punctures in lateral margins ( Fig. 3A View Fig ). Hypomeron medial disc punctures separated by three times the width of a puncture. External margin bearing multiple rows of disorganized long setae (see Fig. 2E View Fig ).

ABDOMEN. Mesosternum and metepisternum fully covered by ocellate setigerous punctures, pilosity dense, setae all of same length. Metasternum setigerous punctures restricted mainly to lateral and anterior areas. Anterior lobe pilosity never connecting with lateral pilosity through margin of mesocoxae (see Fig. 2H View Fig ). Lateral surface with ocellate setigerous punctures separated by twice the width of a puncture, variation in puncture diameter almost imperceptible. Ocellate punctation along anterolateral margins of sternites. Pygidium surface covered by small, fine punctures. Basal margin bearing few ocellate punctures.

ELYTRA. Interstriae shagreened, with fine, randomly separated punctures with interior shagreened microsculpture. Striae hardly marked, with ocellate punctures separated by twice the diameter of a puncture on elytral disc (see Fig. 2J View Fig ).

LEGS. Metacoxa posterior edge bearing two contiguous rows of organized ocellate punctures, separated by half the diameter of a puncture ( Fig. 3E View Fig ).

PARAMERES AND LAMELLA COPULATRIX OF AEDEAGUS. As in Fig. 3 View Fig F–H.

Morphological variation

Females ( Fig. 3B View Fig )

As males except for the following characters:

HEAD. Completely transversely rugose, denser on anterior portion. Cephalic carina bituberculate (see Fig. 1E View Fig ).

PRONOTUM. Weak medial knob, only detectable in lateral view. Hypomeron setae longer and denser than in males.

Remarks

Luederwaldt (1929) placed this species in the assifer   section which included species from the assifer   and agenor   groups. Harold’s type material was from Colombia, but the label does not specify the exact locality. This species is known to occur in Panama, Colombia and Venezuela from 100 to 1500 m a.s.l., in the Caribbean subregion as proposed by Morrone (2001). It is found in the Magdalena and Maracaibo Provinces, associated with dry and humid forests ( Morrone 2001). Individuals of this species are easily confused with D. enioi   sp. nov., a Central American species.

CEMT

CEMT

MNHN

Museum National d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Scarabaeidae

Genus

Dichotomius

Loc

Dichotomius (Luederwaldtinia) agenor ( Harold, 1869 )

Montoya-Molina, Santiago & Vaz-De, Fernando Z. 2021
2021
Loc

Dichotomius agenor

Sarmiento & Amat 2014: 89–90
Ratcliffe B. C. 2002: 15
Medina C. A. & Lopera-Toro A. & Vitolo A. & Gill B. 2001: 138
Howden H. F. & Young O. P. 1981: 13
1981
Loc

Pinotus agenor

Blackwelder R. E. 1944: 69
Luederwaldt H. 1929: 99
1929
Loc

Pinotus agenor

Harold E. 1869: 141
1869