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Scarabaeoidea of Southern South America Links
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Keys |
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Scarab Guide Links
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Classification |
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Bolborhinum laesicolle (Fairmaire, 1856) |
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Bolborhinum laesicolle, male |
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Bolborhinum laesicolle in lateral view. |
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Distribution of Bolborhinum laesicolle in Southern South America |
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Original combination. Bolboceras laesicolle Fairmaire, 1856: 483 (emended from Bolboceras laesicollis).
Type locality: “Chilensia.”
Type series: lectotype at MNHN labeled a) “488” (handwritten), b) “Bolboceras / laesicollis / n. sp. Chili” (handwritten by Fairmaire), c) “TYPE” (red label, typeset), d) “BOLBOCERAS / LAESICOLLE / FAIRMAIRE / LECTOTYPE / A.B.T. SMITH” (red label, handwritten and typeset), e) “Southern Neotropical Scarabs / database # AS2609501 / Bolborhinum laesicolle / (Fairmaire, 1856) / DET: A.B.T.SMITH 2007” (typeset). Lectotype designated by Mondaca and Smith (2008). |
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Synonym. Bolboceras excavatum R. A. Philippi in F. Philippi, 1859: 660 (emended from Bolboceras excavatus).
Type locality: “CHILE: Valdivia, 34 km WNW La Union” (original type locality: “cerca de Corral”).
Type series: neotype at CMNC labeled: “CHILE: Valdivia / 34kmWNWLaUnion / 17.XII.84-7.II.85 / S&JPeck, 700m, FIT / mixedevergr. forest” (typeset), b) “H.&A. HOWDEN / COLLECTION / Ottawa, Canada” (typeset with black border), c) “BOLBOCERAS / EXCAVATUM / PHILIPPI m# / NEOTYPE / A.B.T. SMITH” (red label, handwritten and typeset), d) “Southern Neotropical Scarabs / database # AS2607337 / Bolborhinum laesicolle / (Fairmaire, 1856) / DET: A.B.T. SMITH 2006” (typeset). Neotype designated by Mondaca and Smith (2008).
Synonym. Bolboceras mundum Redtenbacher, 1868: 60.
Type locality: “Chili.”
Type series: holotype at NMWH labeled a) “Zelebor / Novara” (typeset), b) “Z” (typeset), c) “Mundus / Chili. Redt.” (handwritten), d) “laesicolle / det. Felsche” (handwritten and typeset), e) “laesicollis / Fairm / f# / mundus.” (handwritten), f) “Bolboceras / mundus / Typ. Redtb.” (handwritten), g) “BOLBOCERAS / MUNDUM / REDTENBACHER / HOLOTYPE” (handwritten and typeset), h) “Southern Neotropical Scarabs / database # AS2607073 / Bolborhinum laesicolle / (Fairmaire, 1856) / DET: A.B.T. SMITH 2006” (typeset). |
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Specimens examined. 305 specimens were examined from ABTS, AUPC, CDFA, CMNC, CNCI, FMNH, GACC, HAHC, JEBC, JMEC, MEUC, MGAC, MNHN, MNNC, SRTC, UCCC, UMCE, VMDC. |
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Diagnosis. Length 7.5-14.0 mm. Color usually brown dark or black. This species exhibits some sexual dimorphism but much overlap in characters making it difficult to distinguish males from females externally. This species is separated from other Bolborhinum by the shape and placement of the clypeal armature. Head dorsally without horns, but with a large trapezoid formed by 4 tubercles at the corners joined laterally, apically, and basally by carina; larger specimens with longitudinal carinae between head trapezoid and the clypeal apex; frons with deep and wide depression. Pronotum with central anterior excavation deep, narrow, located immediately behind of the anterior border of the pronotum; pronotal declivity widened superiorly, and depressed laterally under of the anterior margin of the pronotum; dorsal surface divided occasionally by a furrow; postero-superior ridge transverse, arcuated posteriorly. |
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Distribution (Fig. 57): ARGENTINA (24). Neuquén (23): San Martín de Los Andes (1); Lago Hermoso (1); Pucará (21). Río Negro (1): El Bolsón (1). CHILE (281). VIII Región del Biobío (23): Chillán (2); Contulmo (1); Hualqui (1); Monumento Natural Contulmo (18); Recinto (1). IX Región de La Araucanía (125): Bellavista (7); Carillanca (1); Cherquenco (2); Cunco (5); Curacautín (1); Flor del Lago (46); Lago Caburgua (41); Loncoche, Catrimaiten (1); Malalcahuello (1); Molco (6); Nahuelbuta, Tolpán (1); Parque Nacional Huerquehue (2); Pemehue (2); Pucón, Fundo El Volcán (1); Río Blanco (2); Termas de Río Blanco (1); Victoria (3); Villarrica (2). X Región de Los Lagos (66): Dalcahue (1); Lago Puyehue (5); Lago Chapo (6); Maullín (1); Mehuin (3); Osorno (1); Parque Nacional Puyehue (36); Puaucho (3); Pucatrihue (3); Puntra (1); Puyehue (4); Todos Los Santos (1); Parque Nacional Vicente Pérez Rosales (1). XIV Región de Los Ríos (61): Calafquen (6); Coñaripe (17); La Unión (10); Llancahue (16); Pancul (2); Panguipulli (3); Rincón de la Piedra Turnoff, SE Valdivia (3); Riñihue (1); Santo Domingo (1); Valdivia (2). Country record only (6). |
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Temporal data. January (54), February (16), March (6), April (1), May (4), September (2), October (5), November (33), December (173). |
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Remarks: This is the smallest known species of Bolborhinum and the only known species in the genus where the males and females are difficult to distinguish externally. It is notable that Howden (1985) made the same general observations on sexual dimorphism for the smaller species of Bolborhachium Boucomont and other Australian Bolboceratini. These Australian taxa and Bolborhinum were hypothesized to be close relatives (Howden & Cooper 1977). |
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References:
Howden, H.F. & Cooper, J.B. (1977) The generic classification of the Bolboceratini of the Australian region, with descriptions of four new genera (Scarabaeidae: Geotrupinae). Australian Journal of Zoology, 50, 1-50.
Philippi, F. (1859) Algunas especies nuevas de coleópteros de la provincia de Valdivia. Anales de la Universidad de Chile, 16, 656-678. |
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Excerpt from:
Mondaca, J. and A.B.T. Smith. (2008) A revision of the southern South American genus Bolborhinum Boucomont (Coleoptera: Geotrupidae: Bolboceratinae). Zootaxa, 1794, 1-48. |
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