Homalochilus punctatostriatus Blanchard, 1851

Cherman, Mariana A., Basílio, Daniel S., Clarkson, Bruno, Agostinis, André O., Smith, Andrew B. T., Vaz-De-Mello, Fernando Z. & Almeida, Lúcia M., 2024, New and revised taxa of Neotropical Diplotaxini (Coleoptera: Melolonthidae): do they change the existing relationships? Revisiting systematics with morphological and molecular data, Zoological Journal of the Linnean Society 201 (1), pp. 98-135 : 112-114

Homalochilus punctatostriatus Blanchard, 1851 ( Fig. 5A–H )

Homalochilus punctatostriatus Blanchard 1851: 172 (original description); Harold 1869: 1141 (catalogue); Kolbe 1907: 65 (catalogue), Bruch 1911: 201 (catalogue); Dalla Torre 1913: 319; Blackwelder 1944: 228 (catalogue); Gutiérrez 1952: 214, 215 (key, redescription); Evans 2003: 206 (catalogue); Evans and Smith 2005: 171 (catalogue); Evans and Smith 2009: 175 (catalogue); Krajčík 2012: 128 (catalogue); Cherman et al. 2016: 765 (systematics); Cherman et al. 2017: 18 (systematics).

Astaena bicolor Ohaus 1911: 556 (original description); Gutiérrez 1952: 211, 215 (synonymy, taxonomy); Bruch 1911: 199 (catalogue); Saylor 1946: 228 (taxonomy); Blackwelder 1944: 221 (catalogue); Cherman et al. 2016: 765 (taxonomy).

Type material examined

Homalochilus punctatostriatus lectotype, ♀, (MNHN): [white handwritten] ‘6040/34’, [light green typeset] ‘MUSÉUM PARIS/ [handwritten] Patagonie/d’Orbigny’, [green handwritten] ‘O. [sic] punctatostriatus /CatMus/Patagonie/ M.d’Orbigny’,[redtypeset] ‘SYNTYPE’. This specimen is here designated the lectotype: [white, outlined in red, typeset] ‘ LECTOTYPE / Homalochilus/ punctatostriatus / Blanchard 1851 /[des.] M. A. Cherman 2015 ’.

According to Gutierrez (1952) the primary type of Astaena bicolor should be at ZMHB, but we were unable to locate it in that collection.

Non-type material examined

ARGENTINA. Without locality [without month].1937, Stempelmann, 1♂ and 2♀ ( MZSP) ; Salta: El Naranjo, Dpto. Rosario de la Frontera , XII.1942, A. Martínez, 1♀ ( CMNC) ; Catamarca: without locality, 2. II.1910, C. Bruch, 1♀ ( MLPA) ; without date, Dirings , 1♂ and 1♀ ( MZSP) ; Ciudad [capital city], XI.1945, Bosq, 1♂ ( MZUC) ; La Rioja: Sierras de Velazco, Mina la Esperanza , III.1944, Monrós, 1♀ ( CMNC) ; Santiago del Estero: Rio Salado [Rio Salado river], without date, Wagner, 1♂ ( MZUC), 3♂ ( MLPA), 1♂ ( CMNC) ; Córdoba: Villa Dolores , XII.1932, without collector, 1♂ and 1♀ ( MLPA) ; San Javier, Las Rosas , I.1944, Monrós, 1♀ ( CMNC) ; Road 38 to Copacabana , 7. III.1980, cow dung, R. E. Woodruff, 1♀ ( CMNC) ; Alta Gracia , II.1934, F. Justus, 2 ex. ( DZUP) ; II.1924, Prosen, 1♂ ( CMNC) ; San Luis: [without locality] Dto. La Capital [current Dto. Pueyrredón], XII.1974, A. Martínez, 3♂ and 1♀ ( CMNC) ; San Jeronimo , I.1979, Viana, 1♂ and 4♀ ( CMNC) ; I.1974, G.J. Williner, 1♂ and 1♀ ( CMNC) ; Balde , XII.1947, A. Martínez, 1♂ ( CMNC) ; Desaguadero , 15.I.2008, G. Arriagada, 2♂ ( CEMT) ; Mendoza: Santa Rosa, Reserva de Ñancuñán , 11–13.XII.2002, V. Manuel Diéguez, 1♂ ( CMNC) .

Diagnosis

Length: 7.6–9.8 mm; width: 4.0– 5.1 mm. Body, head, and pronotum black, elytra on disc red and on margins black; glabrous ( Fig. 5A ); fovea of distal maxillary palpomere extending past the midline; club of antenna as long as the funicle; pronotal posterior corners obtuse angulate; distance between mesocoxae and metacoxae as long as the metacoxae; elytra near 1.5 times longer than the pronotum ( Fig. 5D ); four elytral ridges, the outermost less noticeable; protarsomere I slightly shorter than protarsomere II in both sexes; pygidium subquadrate ( Fig. 5E ); parameres with apex curved downwards, forming obtuse angle with the longitudinal axis ( Fig. 5G, H ).

Type locality

ARGENTINA. Buenos Aires, Bahía de San Blas .

Geographical distribution

ARGENTINA: Salta, Tucumán ( Gutiérrez 1952), Catamarca, La Rioja, Santiago del Estero, Córdoba, San Luis, Mendoza, Buenos Aires.

Figures

Figure 5. Homalochilus punctatostriatus. Male habitus (A); female lectotype habitus (B) and labels (C); male in lateral (D) and posterior (E) views; male metatibial apex (F); parameres in dorsal (G) and lateral (H) views. White arrow indicates the longest spur.