Bolborhinum nasutum ( Fairmaire and Germain, 1861 )

Mondaca, José & Smith, Andrew B. T., 2008, A revision of the southern South American genus Bolborhinum Boucomont (Coleoptera: Geotrupidae: Bolboceratinae), Zootaxa 1794, pp. 1-48 : 13-14

Bolborhinum nasutum ( Fairmaire and Germain, 1861)

( Figs. 4, 5, 21–23)

Original combination. Bolboceras nasutum Fairmaire and Germain, 1861: 2 (emended from Bolboceras nasutus ). Type locality: “Chilensia.” Type series: lectotype at MNHN labeled a) “1620” (handwritten), b) “ Bolboceras / nasutus ” (handwritten by Fairmaire), c) “ TYPE ” (red label, typeset), d) “ BOLBOCERAS / NASUTUM / FAIRMAIRE & GERMAIN / LECTOTYPE ɗ / A.B.T. SMITH” (red label, handwritten and typeset), e) “Southern Neotropical Scarabs / database # AS 2609500 / Bolborhinum nasutum / ( Fairmaire & Germain, 1861) / DET: A.B.T.SMITH 2007” (typeset). Lectotype here designated.

Synonym. Bolboceras andicola Philippi, 1873: 312 . Type locality: “La Leonera, Cord. Rancagua” Chile (original type locality: “Andibus prov. Santiago”). Type series: neotype at FMNH labeled: “LA LEONERA / Cord. Rancagua / 26,30- Dic-1954 ” (typeset), b) “ 1750 m / Coll:L.E. Pena” (typeset with black border), c) “Bolbocera / geotrupoides / Lap. / det. L.E.Pena 1956” (handwritten and typeset), d) “ Bolborhinum / nasutum / Fairmaire / DET. / H.F. HOWDEN 61” (handwritten and typeset), e) “FMNH1986 / L.PeñaColl. / Acc#17- 422” (typeset), f) “ BOLBOCERAS / ANDICOLA / PHILIPPI ɗ / NEOTYPE / A.B.T. SMITH” (red label, handwritten and typeset), d) “Southern Neotropical Scarabs / database # AS 2607237 / Bolborhinum nasutum / ( Fairmaire & Germain, 1861) ɗ / DET: A.B.T.SMITH 2006” (typeset). Neotype here designated. See “Designation of lectotypes and neotypes ” section for further statements of qualifying conditions for the designation of this neotype. All reasonable steps were exhausted to trace the original type material of this taxon. Philippi (1873) did not specify where the type series was deposited. The vast majority of Philippi type specimens are housed in the MNNC. We have unsuccessfully searched for type material at the MNNC on several occasions for type material of this taxon. We can only conclude that the type material has been lost. The specimen selected as the neotype matches the original description of Philippi (1873) and was collected reasonably close to original type locality.

Specimens examined. 53 specimens were examined from AUPC, FMNH, HAHC, JEBC, JMEC, MEUC, MGAC, MNHN, MNNC, SRTC, UCCC, UMCE, VMDC.

Diagnosis. Length 13.0–17.0 mm. Color usually reddish-brown. This species is distinguished from other Bolborhinum by the shape and placement of the cephalic armature in the males. The clypeal horn is located at midline of clypeal apex, directed anteriorly or vertically; horn robust, slightly curved, with apex truncate or rounded. Dorsal surface of the head flat, laterally with two carinae that converge distally at base of clypeal horn; vertex impunctate, not depressed. Pronotum with a small, deep anterior excavation located transversally behind of the apical margin; pronotal declivity widened and flattened broadly behind declivity; posterosuperior ridge transverse, sinuate medially; pronotal surface dorsally impunctate, laterally with puncture scarce, moderately sparse.

Female similar to male, except in the shape and ornamentation of the head; dorsal surface with a weakly elevated tubercle situated on the frontoclypeal line. Pronotum with a small depression located immediately behind the apical margin; disc impunctate, laterally with moderately sparse to dense punctures; punctures moderate in size.

Distribution ( Fig. 58 ). CHILE (53). V Región de Valparaíso (2): Piscicultura (2). Región Metropolitana de Santiago (12): Cerro El Roble (6); El Canelo (4); Quebrada San Ramón (1); Río Clarillo (1). VI Región del General Bernardo O’Higgins (6): Alto Huemul (5); La Leonera (1). VII Región del Maule (27): Cajón del Teno (1); La Mina (1); Reserva Nacional Altos del Lircay (1); Talca (1); Vilches Alto (23). VIII Región del Biobío (5): Las Trancas (1); Piedras Comadres (2); Recinto (1); Shangri-la (1). Country record only (1).

Temporal data: January (9), February (1), October (8), November (10), December (24).

Remarks: Primary types for B. nasutum and its synonym were examined and found to be conspecific according to our concept of this species. This synonymy is here confirmed.

Figures

FIGURE 58. Bolborhinum nasutum distribution.