The new genus Pseudocoelotrachelus (Coleoptera: Scarabaeidae: Aphodiinae) is diagnosed and the new species Pseudocoelotrachelus peckorum from Argentina (Salta) and P. tristaobrancoi from Mexico (Oaxaca) are described and figured

Dellacasa, Giovanni

Dellacasa, Marco

Gordon, Robert D.

English

Dellacasa, Marco, Dellacasa, Giovanni, Gordon, Robert D. (2013): Pseudocoelotrachelus new genus of Neotropical Aphodiini with descriptions of two new species (Coleoptera: Scarabaeidae: Aphodiinae). Insecta Mundi 2013 (287): 1-5, DOI: http://doi.org/10.5281/zenodo.517578

NEUROSURGERY ENTHUSIASTIC WOMEN SOCIETY

Pseudocoelotrachelus new genus of Neotropical Aphodiini with descriptions of two new species (Coleoptera: Scarabaeidae: Aphodiinae)

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CENTER FOR SYSTEMATIC ENTOMOLOGY, INC., Gainesville, FLPseudocoelotrachelus new genus of Neotropical Aphodiini withdescriptions of two new species (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, 20130287INSECTAMUNDI A Journal of World Insect SystematicsMarco Dellacasa, Giovanni Dellacasa, and Robert D. GordonPseudocoelotrachelus new genus of Neotropical Aphodiini with descriptions of twonew species (Coleoptera: Scarabaeidae: Aphodiinae)Insecta Mundi 0286: 1-5ZooBank Registered:  urn:lsid:zoobank.org:pub:0BEF5958-8EA5-45FC-8679-43B54ED77E52Published 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/3.0/10287: 1-5 2013Pseudocoelotrachelus new genus of Neotropical Aphodiini withdescriptions of two new species (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 genus Pseudocoelotrachelus (Coleoptera: Scarabaeidae: Aphodiinae) is diagnosed and the newspecies Pseudocoelotrachelus peckorum from Argentina (Salta) and P . tristaobrancoi from Mexico (Oaxaca) are de-scribed and figured.Key words. Systematics, Pseudocoelotrachelus new genus, P . peckorum new species, P . tristaobrancoi new species,Argentina, Mexico, American Aphodiinae.IntroductionThis work belongs to a series of papers describing new taxa in preparation for a systematic revisionof Mexican Aphodiinae (Coleoptera: Scarabaeidae).Materials and MethodsTerminology used in this work to describe morpho-anatomical features follows that of Dellacasa etal. (2001). Materials studied are in the following collections:CMNO – Canadian Museum of Nature, Ottawa, CanadaDCGI – Dellacasa Collection, Genoa, ItalyFSCA – Florida State Collection of Arthropods, Gainesville, Florida, U.S.A.Genus Pseudocoelotrachelus new genusType species. Pseudocoelotrachelus tristaobrancoi  new species, here designated.Description. Rather small species (length 5.0-5.5 mm); oval elongate, moderately convex, shiny, gla-brous. Piceous or reddish brown. Head with epistome gibbous, finely and sparsely punctured; clypeusslightly sinuate at middle, distinctly denticulate or subangulate at sides, genae protruding from the eyes;frontal suture not tuberculate. Pronotum transverse, moderately convex, simply or dually, rather coarselypunctured; lateral margins almost straight, S-shaped before hind angles; latter obtusely round; base notbordered. Scutellum small, narrowly triangular. Elytra elongate, strongly denticulate at shoulder, finelystriate; striae more or less distinctly punctured, feebly crenulate; interstriae moderately convex or al-2 • INSECTA MUNDI 0287, March 2013 DELLCASA ET AL.most flat, sparsely finely punctured. Fore tibiae distally tridentate and proximally serrulate at outermargin; upper side rather densely coarsely punctured. Hind tibiae with very feeble transverse carinae onouter face, apically fimbriate with progressively unequal spinules. Pygidium very densely and coarselypunctured, punctures setose, pubescence recumbent toward apex; latter with few straight and elongatesetae. Sexual dimorphism shown in males by more transverse and less convex pronotum and by themetasternal plate relatively more distinctly excavate. Aedeagus with parameres elongate, feebly curved,acuminate and distinctly pubescent apically. Epipharynx inwardly sinuate at middle of anterior margin,round at sides; epitorma drop-shaped or campaniform; corypha with two strong and curved apical celtesprotruding from the front margin; pedia pubescent with two lateral subregular series of few elongatespinules; chaetopariae moderately elongate, not very closely arranged.Distribution. Neotropical region.Etymology. The name is a combination of the prefix pseudo- [= false] and the genus name Coelotrachelus.The gender is masculine.Discussion. The primary characteristics of Pseudocoelotrachelus, new genus, are:- scutellum small, triangular;- hind tibiae apically fimbriate with unequal spinules;- pronotum lateral margins S-shaped before hind angles;- aedeagus with parameres pubescent apically;- epipharynx with two strong apical celtes protruding from the anterior margin.The new genus is similar to Coelotrachelus Schmidt, 1913, but is easily distinguished from it by thestrongly differing epipharyngeal shape, fore tibiae proximally serrulate at outer margin with dorsalsurface coarsely and densely punctured, hind tibiae with very feeble transverse carinae at outer face andapex fimbriate with progressively unequal spinules. Pseudocoelotrachelus falls after couplet 60 in the keyto genera of Aphodiini by Dellacasa et al. (2001) that must be modified as follows:60a. Epipharynx with corypha protruding frontward and with a clump of several stout celtes; aedeaguswith parameres glabrous apically. Protibia not densely punctate on dorsal surface. Length 7.0-8.0 mm. Nearctic and Neotropical region ........................................   Coelotrachelus Schmidt— Epipharynx with corypha not reaching the front margin and with two strong and curved apicalceltes; aedeagus with parameres distinctly pubescent apically. Protibia densely punctate ondorsal surface. Length 5.0-5.5 mm. Neotropical region .. Pseudocoelotrachelus new genusKey to species of Pseudocoelotrachelus1. Clypeus angulate at sides of median sinuosity, pronotum dually punctured; elytral interstriaeflat. Brownish-red. Length 5.0-5.5 mm. Mexico (Oaxaca) .....  P . tristaobrancoi new species— Clypeus denticulate at sides of median sinuosity; pronotum evenly punctured; elytral interstriaemoderately convex. Dark piceous. Length 5.0-5.5 mm. Argentina (Salta) ................................................................................................................................................. P . peckorum new speciesPseudocoelotrachelus tristaobrancoi new species(Fig. 1-5)Type locality. La Venta env., 16°11’25.0”N–096°20’50.0”W, m 2467, Oaxaca, Mexico.Type repository. Dellacasa Collection, Genoa, Italy.Description. Length 5.0-5.5 mm; oblong, moderately convex, shiny, glabrous. Entirely reddish brown;antennal club testaceous. Head with epistome slightly gibbous on disc, antero-medially moderately de-INSECTA MUNDI 0287, March 2013 • 3 A NEW GENUS OF NEOTROPICAL APHODIINIFigures 1-10. Pseudocoelotrachelus tristaobrancoi (La Venta env., 16°11’25.0”N-096°20’50.0”W, Oaxaca, Mexico).1) Epipharynx. 2-3) Habitus (length ideogram and morphological details). 4-5) Aedeagus (dorsal and lateral view).Pseudocoelotrachelus peckorum (Pozo Verde Trail, km 7, El Rey Nat. Park, Salta, Argentina). 6) Epipharynx. 7-8)Habitus (length ideogram and morphological details). 9-10) Aedeagus (dorsal and lateral view).4 • INSECTA MUNDI 0287, March 2013 DELLCASA ET AL.pressed, evenly, rather finely, not closely punctured; punctation sparser and somewhat more superficialmedially; clypeus broadly sinuate at middle, subangulate at sides, thinly bordered, edge slightly reflexed,glabrous; genae obtusely round, shortly bristled, protruding from the eyes; frontal suture almost obso-lete; front evenly, finely, rather sparsely punctured. Pronotum transverse, few convex, dually, somewhatirregularly punctured; large coarse punctures, five to six times larger than small ones, denser on sides,lacking medially; small fine punctures evenly scattered throughout, somewhat finer and sparser on disc;lateral margins feebly arcuate, S-shaped before hind angles; latter obtusely round, almost imperceptiblybristled; base nearly straight, not bordered. Scutellum narrowly elongate, subdepressed laterally, finelypunctured medially. Elytra elongate, slightly broadened posteriorly, strongly denticulate at shoulder,finely striate; striae superficially not closely punctured, not crenulate; interstriae almost flat, superfi-cially alutaceous, evenly, rather densely, finely punctured. Hind tibiae superior apical spur shorter thanfirst tarsal segment; latter longer than following three segments combined. Male: pronotum relativelymore transverse and less convex; metasternal plate excavate; aedeagus Fig. 4-5. Female: pronotum rela-tively less transverse and more convex; metasternal plate almost flat.Type material. MEXICO: Oaxaca: La Venta env., 16°11’25.0”N–096°20’50.0”W, m 2467, 28.VI.2007,leg. Dellacasa M., Fresi C. & Martínez I. (holotype, male, and allotype DCGI, 1 paratype, FSCA).Distribution. Known from the type locality only.Etymology. Named in honor of our dear friend and colleague Tristão Branco, Portuguese scarabaeidologist.Bionomics. Almost unknown. Specimens of the type series were collected in June.Pseudocoelotrachelus peckorum new species(Fig. 6-10)Type locality. Pozo Verde Trail, km 7, El Rey Nat. Park, m 1000, Salta Prov., Argentina.Type repository. Canadian Museum of Nature, Ottawa, Canada.Description. Length 5.0-5.5 mm; oblong, moderately convex, shiny, glabrous. Dark piceous; clypealmargin and pronotum sides shadowy reddish brown; legs and antennal club piceous. Head with epistomefeebly gibbous medially, anteriorly with vestiges of arcuate transverse carina; finely sparsely punctured,punctation more superficial distally; clypeus slightly sinuate at middle, distinctly denticulate at sides,denticles moderately reflexed, very thinly bordered, edge glabrous; genae acutely angulate, shortly cili-ate, strongly protruding from the eyes; frontal suture finely impressed; front subregularly punctured,punctation somewhat coarser than on epistome. Pronotum feebly transverse, moderately convex, ratherclosely, simply and subregularly punctured; lateral margins almost straight, very thinly bordered, edgeglabrous, S-shaped before hind angles; latter obtusely round and very shortly bristled; base slightlybisinuate, not bordered. Scutellum finely sparsely punctured on basal half. Elytra feebly broadened pos-teriorly, strongly denticulate at shoulder, rather deeply striate; striae feebly crenulate; interstriae moder-ately convex, finely and sparsely punctured. Hind tibiae superior apical spur shorter than first tarsalsegment; latter somewhat longer than following three segments combined. Male: metasternal plate mod-erately excavate and with superficial median longitudinal groove; aedeagus Fig. 9-10. Female: metasternalplate almost flat, only with trace of median longitudinal groove.Type material. ARGENTINA: Salta Prov., Pozo Verde Trail, km 7, El Rey Nat. Park, m 1000, 9-15.XII.1987, leg. S. & J. Peck, dung trap, Yungas forest (holotype, male, allotype CMNO; 1 paratype,DCGI).Distribution. Known from the type locality only.Etymology. Named in honor of its collectors, Stewart and Jarmila Peck.INSECTA MUNDI 0287, March 2013 • 5 A NEW GENUS OF NEOTROPICAL APHODIINIBionomics. The specimens of the type series were collected in December in Yungas forest by dung traps(labels data).AcknowledgmentsThanks are due to P . Bouchard (Ottawa) for loan of material and to P . Bordat (Saint-Cirq) and M.Rakovic (Prague) 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 [2000] 79: 1-482.Received November 13, 2012; Accepted February 3, 2013.6 • INSECTA MUNDI 0287, March 2013 DELLCASA ET AL.

Pseudocoelotrachelus : new genus of Neotropical Aphodiini with descriptions of two new species (Coleoptera: Scarabaeidae: Aphodiinae)

Dellacasa, Marco, Dellacasa, Giovanni, Gordon, Robert D. (2013): Pseudocoelotrachelus new genus of Neotropical Aphodiini with descriptions of two new species (Coleoptera: Scarabaeidae: Aphodiinae). Insecta Mundi 2013 (287): 1-5, DOI: 10.5281/zenodo.517578

Pseudocoelotrachelus : new genus of Neotropical Aphodiini with descriptions of two new species (Coleoptera: Scarabaeidae: Aphodiinae)

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