Ligyrus (Ligyrus) rubripes ( Boheman, 1858 )

López-García, Margarita M. & Deloya, Cuauhtémoc, 2022, Cladistic analysis reveals polyphyly of Tomarus (Coleoptera: Scarabaeidae: Dynastinae): new classification and taxonomic revision, Zootaxa 5211 (1), pp. 1-119 : 49-50

Ligyrus (Ligyrus) rubripes ( Boheman, 1858)

( Figs. 15R , 18J , 26G ; 35 )

Podalgus rubripes Boheman, 1858: 57 . Original combination.

Male lectotype designated by Endrödi (1969: 54) (NHRS) “rubripes. Blm. Eug. / Bohem. // Lectotypus / ( Ligyrus ) / rubripes / Boh. / Endrody // 8840 / E91 + // 336 / 66 // Kinb. // Monte- / video // NHRS-JLKB / 000023334”

Ligyrus patagonus Steinheil, 1874: 560 . New synonym. Original combination. Female holotype (MNHN) “Patagones // patagonus / G. Steinh // ExMusaeo / E. Steinheil // Holotypus ♀ / Ligyrus / patagonus / Steinh. // MNHN / EC7092” Type locality: Patagones, Argentina. According to Endrödi (1969), the holotype is a “monstrous” specimen of L. villosus but the shape of the pronotal tubercle and metafemur and its type locality are evidence that it is a female of L. rubripes .

Ligyrus gianucai Dechambre & Lumaret, 1985: 107 . Synonym. Male holotype (MNHN) “ Sand dunes / 28 Km S. Casino Beach / Brésil 25 II 1982 // N.M. gianuca Leg. // Ligyrus gianucai n. sp. inilú / HOLOTYPE / R.-P. Dechambre det. 1984 // HOLOTYPE // MNHN / EC6731 ”.

Description. Habitus as in Fig. 26G . Length 12.1–16.5 mm; humeral width 5.8–9.2 mm. Color dark reddish brown. Head: Frons deeply rugopunctate, with large and sparse punctures, nearly smooth on vertex and only with sparse, small punctures. Frontoclypeal region with a carina, narrowly interrupted at middle. Ocular canthus acute, with 8 ventral setae. Clypeal surface rugopunctate to transversely rugose, striae denser than those on frons. Clypeus short, with lateral margins perpendicularly elevated, base 3 times wider than apex. Clypeal teeth triangular, separated by a tooth diameter. Mandible with 2 apical and 1 lateral, rounded tooth, tooth 1 longer and narrower than tooth 2. Maxilla subrectangular; galea with 3 dorsal and 2 ventral teeth. Apex of labrum straight to rounded. Interocular distance 3.5 times an eye width. Antennal club very long. Pronotum: Surface with large, sparse punctures. Apex with prominent tubercle and shallow to deep fovea. Elytra: First interval punctate, punctures similar to other intervals. Inner surface of apex with small transverse tubercles forming about 115 parallel lines. Abdomen: Apex of tergite IV with a diagonal line of 11 transverse parallel long carinae. Pygidial surface with small to large punctures, denser on base and anterior corners. Strongly (male) to slightly (female) convex in lateral view. Legs: Protibia tridentate; basal tooth slightly distant from others. Protarsus of male simple, inner claw simple. Metatibia triangular. Apex of metatibia entire, with 28–30 spinules. Female genitalia: Subcoxite subrectangular (2 times wider than long). Coxite subquadrate (as long as wide); surface flat. Subcoxite wider and subequal in length to coxite. Male genitalia: Spiculum gastrale thin, apex truncate. Parameres with apical 4th narrowed, without minute spines; lateral, ventral teeth short, triangular, and closer to parameral base ( Figs. 15R , 18J ).

Diagnosis. Ligyrus rubripes can be recognized by a short clypeus, with lateral margins perpendicularly elevated, strongly contracted towards apex; clypeal teeth triangular, long, and widely separated; frontal carina narrowly interrupted at middle; pronotum with prominent, acute tubercle and deep ( Fig. 26G ), wide fovea (about 1.2 times interocular width); metatibia strongly triangular, without lateral constrictions; coxite surface flat; parameres with apical 4th narrowed, without minute spines; lateral teeth of parameres short, triangular ( Figs. 15R , 18J ).

Geographic distribution. Ligyrus rubripes is found in southern Brazil, Uruguay, and Argentina.

Locality records ( Fig. 35 ). 10 specimens examined from MN / UFRJ, MNHN, MZUSP, NHRS. ARGENTINA (2). Buenos Aires (2): Carmen de Patagones; Felipe Solá. BRAZIL (7). São Paulo (6): Guarujá; Itanhaemi; Peruíbe. Rio Grande do Sul (1): Praia do Cassino (28 km S). URUGUAY (1). Montevideo (1): Montevideo .

Figures

FIGURE 15. Parameres in frontal view. A) Euligyrus ebenus, B) E. similis, C) Proculigyrus cicatricosus, D) Ligyrus (Anagrylius) cuniculus, E) L. (Anagrylius) moroni, F) L. (Ligyrodes) peruvianus, G) L. (Ligyrodes) relictus, H) L. (Ligyrodes) sallaei, I) L. (Ligyrus) allonasutus, J) L. (Ligyrus) bidentulus, K) L. (Ligyrus) burmeisteri, L) Ligyrus (Ligyrus) fossor, M) L. (Ligyrus) gibbosus, N) L. (Ligyrus) nasutus, O) L. (Ligyrus) neglectus, P) L. (Ligyrus) paranaensis, Q) L. (Ligyrus) peninsularis, R) L. (Ligyrus) rubripes, S) L. (Ligyrus) ruginasus, T) L. (Ligyrus) villosus.

FIGURE 18. Parameres in lateral view.A) L. (Ligyrus.) allonasutus, B) L. (Ligyrus) bidentulus, C) L. (Ligyrus) burmeisteri, D) Ligyrus (Ligyrus) fossor, E) L. (Ligyrus) gibbosus, F) L. (Ligyrus) nasutus, G) L. (Ligyrus) neglectus, H) L. (Ligyrus) paranaensis, I) L. (Ligyrus) peninsularis, J) L. (Ligyrus) rubripes, K) L. (Ligyrus) ruginasus, L) L. (Ligyrus) villosus.

FIGURE 26. Habitus of the species of Ligyrus. Subgenus Ligyrus: A) Ligyrus fossor, B) L. gibbosus, C) L. nasutus, D) L. neglectus, E) L. paranaensis, F) L. peninsularis, G) L. rubripes, H) L. ruginasus, I) L. villosus. Scale bar: 5 mm.

FIGURE 35. Distributional records of Ligyrus (Ligyrus) villosus, L. bidentulus, and L. rubripes.