The new species Cephalocyclus majomaensis and Oscarinus cabreroi from Mexico are described and figured. While studying specimens from Mexico to complete a systematic revision of the Aphodiinae (Coleoptera: Scarabaeidae) of that region, we found a couple of species new to science. They belong to the genera Cephalocyclus Dellacasa, Gordon and Dellacasa, 1998 and Oscarinus Gordon and Skelley, 2007, and are described here

Dellacasa, Giovanni

Dellacasa, Marco

Gordon, Robert D.

English

Dellacasa, Marco, Dellacasa, Giovanni, Gordon, Robert D. (2013): Cephalocyclus majomaensis and Oscarinus cabreroi new species of Mexican Aphodiinae (Coleoptera: Scarabaeidae: Aphodiinae). Insecta Mundi 2013 (285): 1-5, DOI: 10.5281/zenodo.517577

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Cephalocyclus majomaensis and Oscarinus cabreroi new species of Mexican Aphodiinae (Coleoptera: Scarabaeidae: Aphodiinae)

Dellacasa, Marco, Dellacasa, Giovanni, Gordon, Robert D. (2013): Cephalocyclus majomaensis and Oscarinus cabreroi new species of Mexican Aphodiinae (Coleoptera: Scarabaeidae: Aphodiinae). Insecta Mundi 2013 (285): 1-5, DOI: http://doi.org/10.5281/zenodo.517577

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CENTER FOR SYSTEMATIC ENTOMOLOGY, INC., Gainesville, FLCephalocyclus majomaensis and Oscarinus cabreroi new speciesof Mexican  Aphodiinae  (Coleoptera:  Scarabaeidae:  Aphodiinae)Marco DellacasaMuseo di Storia Naturale e del TerritorioUniversità di PisaVia Roma, 79I-56011 Calci (Pisa), ItalyGiovanni DellacasaVia Talamone 31/19I-16127 Genova, ItalyRobert D. GordonNorthern Plains EntomologyP .O. Box 65Willow City, ND 58384 USADate of Issue: March 8, 20130285INSECTAMUNDI A Journal of World Insect SystematicsMarco Dellacasa, Giovanni Dellacasa, and Robert D. GordonCephalocyclus majomaensis and Oscarinus cabreroi new speciesof Mexican Aphodiinae (Coleoptera: Scarabaeidae: Aphodiinae)Insecta Mundi 0285: 1-5ZooBank Registered:  urn:lsid:zoobank.org:pub:33643759-5219-411C-8BEF-7B0EC316F063Published in 2013 byCenter for Systematic Entomology, Inc.P. O. 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Archived digitally by Portico.Florida Virtual Campus: http://purl.fcla.edu/fcla/insectamundiUniversity of Nebraska-Lincoln, Digital Commons: http://digitalcommons.unl.edu/insectamundi/Goethe-Universität, Frankfurt am Main: http://edocs.ub.uni-frankfurt.de/volltexte/2010/14363/Author instructions available on the Insecta Mundi page at:http://www.centerforsystematicentomology.org/insectamundi/Copyright held by the author(s). This is an open access article distributed under the terms of the Creative Commons,Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduc-tion in any medium, provided the original author(s) and source are credited. http://creativecommons.org/licenses/by-nc/3.0/10285: 1-5 2013Cephalocyclus majomaensis and Oscarinus cabreroi new species ofMexican Aphodiinae (Coleoptera: Scarabaeidae: Aphodiinae)Marco DellacasaMuseo di Storia Naturale e del Territorio, Università di PisaVia Roma, 79I-56011 Calci (Pisa), Italydellacasa@museo.unipi.itGiovanni DellacasaVia Talamone 31/19I-16127 Genova, Italydellacasag@alice.itRobert D. GordonNorthern Plains EntomologyP .O. Box 65Willow City, ND 58384 USArdgordon@utma.comAbstract. The new species Cephalocyclus majomaensis and Oscarinus cabreroi from Mexico are described and fig-ured.Key words. Systematics, Cephalocyclus majomaensis, Oscarinus cabreroi, new species, Mexico, Aphodiinae.IntroductionWhile studying specimens from Mexico to complete a systematic revision of the Aphodiinae (Co-leoptera: Scarabaeidae) of that region, we found a couple of species new to science. They belong to thegenera Cephalocyclus Dellacasa, Gordon and Dellacasa, 1998 and Oscarinus Gordon and Skelley, 2007,and are described here.Materials and methodsTerminology used to describe morpho-anatomical features follows that of Dellacasa et al. (2001).Specimens studied are in the following collections:CMNO – Canadian Museum of Nature, Ottawa, Canada [H. F. Howden Collection]CNCI – Canadian National Collection, Ottawa, CanadaDCGI – Dellacasa Collection, Genoa, ItalyFSCA – Florida State Collection of Arthropods, Gainesville, Florida, U.S.A.RHTC – R. H. Turnbow Collection, Enterprise, Alabama, U.S.A.USNM – United States National Museum, Washington, D. C., U.S.A.Cephalocyclus majomaensis new species(Fig. 1-4)Type locality. Majoma, Zacatecas, Mexico.Type repository. Unites States National Museum, Washington, D. C., U.S.A.Description of male. Length 6.5-7.0 mm; elongate, moderately convex, shiny, glabrous. Testaceous;head and pronotum somewhat darker than elytra. Head with epistome weakly convex on disc, slightly2 • INSECTA MUNDI 0285, March 2013 DELLACASA ET AL.depressed medially toward clypeal margin, sparsely irregularly not closely punctured, smooth at center;clypeus faintly sinuate at middle, round at sides, very thinly bordered, edge upturned and elongatelyciliate laterally; genae angulate, depressed, elongately ciliate, strongly protruding from the eyes; frontalsuture not tuberculate, distinctly impressed laterally, obsolete at middle; front finely irregularly, sparselypunctured. Pronotum transverse, moderately convex, shiny, dually punctured; large punctures, three tofour time larger than small ones, irregularly sparse on sides, lacking on disc; small punctures, somewhatvariously sized, coarser and denser on sides, superficial and sparser on disc; lateral margins moderatelyarcuate, rather thickly bordered, edge elongately sparsely ciliate; hind angles obtusely round; base dis-tinctly bisinuate, not bordered. Scutellum elongate, alutaceous, sparsely moderately punctured. Elytravery elongate, weakly widened posteriorly, epipleural carina elongately ciliate in basal two thirds; striaevery fine, superficially almost indistinctly punctured, not crenulate; interstriae faintly convex, minutelyalutaceous, with extremely fine, irregularly sparse and barely perceptible punctures. Hind tibiae supe-rior spur shorter than first tarsal segment; latter shorter than following three segments combined.Aedeagus Fig. 4. Female: unknown.Type material. MEXICO: Zacatecas: Majoma; 07.III.1934; leg. Smith & Dunkley (holotype, male,USNM; 1 paratype, male, DCGI).Distribution. Known from the type locality only.Etymology. Named after the type locality.Bionomics. Almost unknown; the specimens of the type series were collected in March.Discussion. Cephalocyclus majomaensis is most similar to C. howdenorum Dellacasa, Dellacasa andGordon, 2007, but can be easily distinguished from that species. It falls C. howdenorum in couplet 21 ofthe key to Cephalocyclus in Dellacasa et al. (2011: 35) which has to be modified as follows:22. Elytra broadly oval; interstriae near imperceptibly pubescent toward apex. Hind tibiae superiorspur as long as first tarsal segment; latter as long as following three segments combined. Darkpiceous, clypeal margin and pronotal sides somewhat paler; elytra dark yellowish brown. Length7.0-8.0 mm. Mexico (Nuevo León)....  C. howdenorum Dellacasa, Dellacasa and Gordon— Elytra very elongate, feebly widened posteriorly, glabrous. Hind tibiae superior spur shorterthan first tarsal segment; latter shorter than following three segments combined. Testaceous,head and pronotum somewhat darker. Length 6.5-7.0 mm. Mexico (Zacatecas) ................................................................................................................................ C. majomaensis new speciesOscarinus cabreroi new species(Fig. 5-9)Type locality. Cerro El Potosí, 24°52’28.1”N–100°13’14.9”W, m 3274, Nuevo León, Mexico.Type repository. Dellacasa Collection, Genoa, Italy.Description. Length 4.0-4.5 mm; shortly oval, strongly convex, shiny, almost glabrous. Blackish, clypealmargin, anterior angles of pronotum, base and preapical declivity of elytra shadowy brownish-red; legsbrownish; antennal club piceous. Head with epistome moderately convex, irregularly punctured; puncta-tion distally dense, coarse and somewhat confuse, proximally rather fine and sparse; clypeus faintlysinuate at middle, weakly denticulate at sides, very thinly bordered, edge feebly upturned, glabrous;genae angulose, scarcely ciliate, protruding from the eyes; frontal suture finely impressed laterally, al-most obsolete medially, not tuberculate; front evenly, rather coarsely, not closely punctured. Pronotumtransverse, convex, dually and somewhat irregularly punctured; large, coarse, faintly umbilicate punc-tures, five times larger than small ones, denser on sides, very sparse on disc; small punctures evenlyINSECTA MUNDI 0285, March 2013 • 3 NEW SPECIES OF MEXICAN APHODIINAEFigures 1-9. Cephalocyclus majomaensis (Majoma, Zacatecas, Mexico; holotype). 1) Epipharynx. 2-3) Habitus ofmale (length ideogram and morphological details). 4) Aedeagus (lateral view). Oscarinus cabreroi (Cerro El Potosí,Nuevo León, Mexico; holotype). 5) Epipharynx. 6-7) Habitus (morphological details and length ideogram). 8-9)Aedeagus (dorsal and lateral views).4 • INSECTA MUNDI 0285, March 2013 DELLACASA ET AL.scattered throughout, somewhat finer on disc; lateral margins feebly arcuate, thinly bordered, edgeglabrous; hind angles obtusely round, base slightly bisinuate, distinctly bordered. Scutellum somewhatconvex, finely, not closely punctured on basal half. Elytra strongly convex, rather elongate, almostsubparallel-sided; striae rather deep, very superficially, not closely punctured, not crenulate; interstriaeflat, finely sparsely, biseriately punctured, punctures denser and coarser on preapical declivity; lateralinterstriae, toward apex, with extremely short sparse setae. Hind tibiae superior spur shorter than firsttarsal segment; latter somewhat longer than following three segments combined. Male: head and pronotumrelatively less densely and less coarsely punctured; fore tibiae spur somewhat stouter and more abruptlydownward bent; aedeagus Fig. 8-9. Female: head and pronotum relatively more densely and more coarselypunctured; fore tibiae spur somewhat slender and regularly curved downward.Type material. MEXICO: Chihuahua: Basaseachi, 28°13’00.9”N-108°13’27.5”W, m 2037, 26.V .2005,leg. Dellacasa M., Fresi C., Martínez I., Cabrero F. & Trotta N. (2 paratypes, DCGI); Nuevo León:Cerro El Potosí, 24°52’28.1”N-100°13’14.9”W, m 3274, 04.VII.2006, leg. Dellacasa M., Fresi C. & MartínezI., cow dung (holotype, male, allotype and 41 paratypes, DCGI; 2 paratypes, FSCA); Cerro Potosí,10300’, 15-16.VII.1963, leg, Howden H. F. (3 paratypes, CMNO); idem, 12100’, 01.VI.1997, leg. TurnbowR. (5 paratypes, RHTC); idem, 54-55 km W Linares, 17.VII.1988, leg. Turnbow R. (2 paratypes, RHTC);Mpio. Galeana, Cerro Potosí, 24°52’18”N-100°13’56”W, m 3720, 26.V .2005, leg. Carillo P ., bosque de pino(1 paratype, DCGI); Galeana, Cerro Potosí, 04.VI.1983, leg. Kaulbara M. (5 paratypes, CMNO); idem,10-12000’, 27.VI.1969, leg. Peck S. & J. (8 paratypes, CMNO, DCGI); idem, m 3750, 04.VI.1983, leg.Peck S. & J., summit litter Berlese (1 paratype, CMNO); San Luis Potosí: 10 km E Ciudad Valles,24.VII.1988, leg. Turnbow R. (2 paratypes, RHTC); Sinaloa: El Palmito, 02.VII.1964, leg. Howden H.F. (5 paratypes, CMNO, DCGI).Distribution. Mexico (Chihuahua, Nuevo León, San Luis Potosí, Sinaloa).Etymology. Named in honor of our friend and colleague Francisco J. Cabrero-Sañudo, Spanishscarabaeidologist.Bionomics. Late spring and summer species feeding on cow dung, probably in sheltered areas.Discussion. Oscarinus cabreroi is most similar to O. spiniclypeus (Hinton, 1934). It can be easily distin-guished from that species by the following key1. Epistome coarsely punctured distally. Elytra very shortly and sparsely pubescent on preapicaldeclivity, with interstriae distinctly punctured. Color blackish with clypeal margin, sides ofpronotum, base and apex of elytra brownish red. Mexico (Chihuahua, Nuevo León, San LuisPotosí, Sinaloa).....................................................................................  O. cabreroi new species— Epistome granulose distally. Elytra are glabrous, with interstriae almost imperceptibly punctured.Color entirely blackish. Mexico (Distrito Federal [Gordon and Skelley, 2007: 164], Guerreroand México) .........................................................................................  O. spiniclypeus (Hinton)AcknowledgmentsThanks are due to P . Bouchard (Ottawa), H. Howden (Ottawa), R. Turnbow (Enterprise) for loan ofmaterial and to P . Bordat (Saint-Cirq) and T. Branco (Porto) for critical reviews of the manuscript.Literature citedDellacasa, G., P . Bordat, and M. Dellacasa. 2001. A revisional essay of world genus-group taxa ofAphodiinae. Memorie della Società Entomologica Italiana. 79 [2000]: 1-482.Dellacasa, M., G. Dellacasa, and R. D. Gordon. 2007. Systematic revision of the genus Cephalocycluswith description of ten new species from Mexico and Costa Rica. Acta Zoologica Mexicana (N. S.). 23(2): 89-128.INSECTA MUNDI 0285, March 2013 • 5 NEW SPECIES OF MEXICAN APHODIINAEDellacasa, M., G. Dellacasa, and R. D. Gordon. 2011. Cephalocyclus pseudofuliginosus new speciesfrom Mexico (Oaxaca). Acta Zoologica Cracoviensia 54B (1-2): 31-36.Gordon, R. D., and P . E. Skelley. 2007. A monograph of the Aphodiini inhabiting the United Statesand Canada. Memoirs of the American Entomological Institute 79: 1-580.Received November 13, 2012; Accepted February 3, 2013.6 • INSECTA MUNDI 0285, March 2013 DELLACASA ET AL.

Cephalocyclus majomaensis and Oscarinus cabreroi new species of Mexican Aphodiinae (Coleoptera: Scarabaeidae: Aphodiinae)

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