The monotypic aesaline genus Lucanobium Howden and Lawrence (Coleoptera: Lucanidae) was previously known only from Venezuela. A second species is here described as new from French Guiana, extending the range of the genus approximately 1800 km to the southeast. The generic description of Lucanobium is updated with respect to the discovery of a second species

Paulsen, Matthew J.

English

Paulsen, M.J. (2011): A second species of Lucanobium Howden and Lawrence from South America (Coleoptera: Lucanidae: Aesalinae). Insecta Mundi 2011 (171): 1-3, DOI: http://doi.org/10.5281/zenodo.516065

Paulsen, M.J.

NEUROSURGERY ENTHUSIASTIC WOMEN SOCIETY

A second species of Lucanobium Howden and Lawrence from South America (Coleoptera: Lucanidae: Aesalinae)

Hochschulschriftenserver - Universität Frankfurt am Main

CENTER FOR SYSTEMATIC ENTOMOLOGY, INC., Gainesville, FLA second species of Lucanobium Howden and Lawrence from SouthAmerica (Coleoptera: Lucanidae: Aesalinae)M.J. PaulsenSystematics Research CollectionsUniversity of Nebraska State MuseumW436 Nebraska HallLincoln, NE 68588-0546, USADate of Issue: April 15, 2011INSECTAMUNDI A Journal of World Insect Systematics0171M.J. PaulsenA second species of Lucanobium Howden and Lawrence from South America (Co-leoptera: Lucanidae: Aesalinae)Insecta Mundi 0171: 1-3Published in 2011 byCenter for Systematic Entomology, Inc.P. O. Box 141874Gainesville, FL 32614-1874 U. S. A.http://www.centerforsystematicentomology.org/Insecta Mundi is a journal primarily devoted to insect systematics, but articles can be published onany non-marine arthropod. Topics considered for publication include systematics, taxonomy,  nomencla-ture, checklists, faunal works, and natural history. Insecta Mundi will not consider works in theapplied sciences (i.e. medical entomology, pest control research, etc.), and no longer publishes book re-views or editorials. Insecta Mundi publishes original research or discoveries in an inexpensive andtimely manner, distributing them free via open access on the internet on the date of publication.Insecta Mundi is referenced or abstracted by several sources including the Zoological Record, CABAbstracts, etc. Insecta Mundi is published irregularly throughout the year, with completed manu-scripts assigned an individual number. Manuscripts must be peer reviewed prior to submission, afterwhich they are reviewed by the editorial board to ensure quality. One author of each submitted manu-script must be a current member of the Center for Systematic Entomology.Managing editor: Paul E. Skelley, e-mail: insectamundi@gmail.comProduction editor: Michael C. Thomas & Ian Stocks, e-mail: insectamundi@gmail.comEditorial board: J. H. Frank, M. J. PaulsenSubject editors: G.B. Edwards, J. Eger, A. Rasmussen, F. Shockley, G. Steck, Ian Stocks, A. Van Pelt,J. ZaspelPrinted copies deposited in libraries of:CSIRO, Canberra, ACT, AustraliaMuseu de Zoologia, São Paulo, BrazilAgriculture and Agrifood Canada, Ottawa, ON, CanadaThe Natural History Museum, London, Great BritainMuzeum i Instytut Zoologiczny PAN, Warsaw, PolandNational Taiwan University, Taipei, TaiwanCalifornia Academy of Sciences, San Francisco, CA, USAFlorida Department of Agriculture and Consumer Services, Gainesville, FL, USAField Museum of Natural History, Chicago, IL, USANational Museum of Natural History, Smithsonian Institution, Washington, DC, USAZoological Institute of Russian Academy of Sciences, Saint-Petersburg, RussiaElectronic copies in PDF format:Printed CD mailed to all members at end of year.Florida Center for Library Automation: 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/Printed copies deposited in libraries (ISSN 0749-6737)Electronic copies in PDF format (On-Line ISSN 1942-1354, CDROM ISSN 1942-1362)Copyright held by the author(s). This is an open access article distributed under the terms of the CreativeCommons, Attribution Non-Commercial License, which permits unrestricted non-commercial use, dis-tribution, and reproduction in any medium, provided the original author(s) and source are credited. http://creativecommons.org/licenses/by-nc/3.0/10171: 1-3 2011A second species of Lucanobium Howden and Lawrence from SouthAmerica (Coleoptera: Lucanidae: Aesalinae)M.J. PaulsenSystematics Research CollectionsUniversity of Nebraska State MuseumW436 Nebraska HallLincoln, NE 68588-0546, USAmpaulsen@unlserve.unl.eduAbstract . The monotypic aesaline genus Lucanobium Howden and Lawrence (Coleoptera: Lucanidae) was previ-ously known only from Venezuela.  A second species is here described as new from French Guiana, extending therange of the genus approximately 1800 km to the southeast. The generic description of Lucanobium is updated withrespect to the discovery of a second species.IntroductionHowden and Lawrence (1974) described Lucanobium squamosum as a new genus and species ofaesaline stag beetle from Venezuela. The genus is readily distinguished from the Central American Aesaliniby the flat, disc-like scales and clumps of erect bristles on the dorsal surface; step-like projection on theposterior face of the prosternal process and the accompanying cavity on the mesosternum; and charactersof the mouthparts (Howden and Lawrence 1974). Until now, L. squamosum has been the only knownmember of the tribe Aesalini in South America.In 2007, I examined two specimens of the genus that were collected by Dr. Joseph Eger in FrenchGuiana and subsequently deposited in the Florida State Collection of Arthropods (FSCA), Gainesville,Florida, USA. Although the specimens were smaller than L. squamosum, they were not immediatelydistinguishable from that species externally.  Both specimens were female, which precluded the use ofmale genitalic characters that are extremely useful in aesaline taxonomy. In 2010, two additional speci-mens were donated by Dr. Eger from a more recent collecting trip, and this material included a malespecimen (Fig. 1). The genitalia of this specimen differ significantly from that of L. squamosum, and thusthe species is described here as new. The species becomes only the second stag beetle species occurring inFrench Guiana, along with Brasilucanus alvarengai Vulcano and Pereira.Specimens of Lucanobium are rarely encountered, although this is probably due to a lack of collectingeffort.  Only six specimens of L. squamosum (Howden and Lawrence 1974, Araya 2000) and four speci-mens of the new species are known. The original type series of L. squamosum were collected at light (H.Howden, pers. comm.). The labels on all specimens of the new species indicate that they were collected atmercury vapor light or at ultraviolet light as well. Other than being attracted to light, the life history ofthese beetles remains unknown.Lucanobium Howden and Lawrence 1974Type species: Lucanobium squamosum Howden and Lawrence 1974, by original designation.Description. Coleoptera: Scarabaeoidea: Lucanidae: Aesalinae: Aesalini. Characters as described byHowden and Lawrence (1974), except for the following modifications. Length: 3.5-5.0 mm. Width: 2.5-3.3mm. Head: Antenna straight, appearing partially geniculate (pseudogeniculate), pedicel arising fromend of scape but bent anteriorly. Labrum relatively large for tribe, about 1/3 clypeal length, distinct inanterior view.  Legs: Protibia with small (relative to other aesalines), curved apical tooth; subapical teethsmall and obscured by longer, thick scale-like bristles along protibial margin (Fig. 2). Metatibia in ven-tral view with apex not as strongly sexually dimorphic as in other genera (not as acute in males orobtusely expanded in females). Ventral surface: Metasternum lacking furrows, foveae or pits to receivelegs.  Male genitalia: Basal piece and parameres short, 1/10 to 1/5 as long as median lobe. Median lobeslightly to strongly curved, expanded apically or not.2 • INSECTA MUNDI 0171, April 2011 PAULSENLucanobium guianense Paulsen, new speciesType specimens. Holotype male (FSCA) labeled: a) “FRENCH GUIANA: / Amazone Nature Lodge / 30km SE Roura on / Kaw Rd. 5-19-II-2010 / J. E. Eger, coll., 300 m”; b) “N04o33.570’ / W052o12.433’ / UVLight Trap”; c) on red paper, “Lucanobium guianense / Paulsen [male symbol] / HOLOTYPE”. Allotypefemale (FSCA) labeled: a) “FRENCH GUIANA: Ama- / zone Nature Lodge, 30 / km SE Roura on Kaw / Rd.10-18-IV-2007, D / G Hall & J E Eger, coll.”; b) “N04o34.135’ / W052o11.150’ / 227m MV Light”; c) on redpaper, “Lucanobium guianense / Paulsen [female symbol] / ALLOTYPE”. Female paratype (in the collec-tion of the author) labeled: a) FRENCH GUIANA: 28 / km SE Roura on Kaw / Rd., 17-II-2010, J. E. / Eger,coll., MV Light”; b) “N040o34.252’ / W052o12.797’; 306 m elev.”; c) on yellow paper, “Lucanobium guianense/ Paulsen [female symbol] / PARATYPE”. Female paratype (FSCA) labeled: a) “FRENCH GUIANA: 27 /km SE Roura on Kaw / Rd. 21-IV-2007, J. E. / Eger, coll. MV Light”, b) “[female symbol]”; c) as precedingparatype.Holotype description. Length: 4.2 mm. Width: 2.9 mm. Color/Vestiture: Surface dark brown, mostlyobscured by flat, disc-like whitish or tan scales and erect, dark and light brown scale-like bristles. Head:Surface as in L. squamosum. Mentum rectangular, elongate (distinctly wider than long). Base of maxilla(stipes/cardo) distinctly protruding from beneath mentum. Pronotum: Form half as long as wide, moder-ately convex. Posterior margin bisinuate, anterior angles acute.  Surface covered with disk-like scalesand scattered, erect bristles; middle with transverse band of 4 poorly-defined clumps of dark bristles.Elytra: Surface as in L. squamosum, but overall scale and bristle color darker. Legs: Apex of metatibianot tumid in ventral view.  Male genitalia: Aedeagus with basal piece and parameres fused to medianFigures 1-4. Lucanobium spp. 1-3)  Lucanobium guianense n. sp., male holotype: 1) Dorsal habitus;  2) Head andprotibiae; 3) Male genitalia, a) dorsal and b) lateral views. 4) Lucanobium squamosum, male genitalia fromHowden and Lawrence 1974, a) dorsal and b) lateral views (reproduced with permission).INSECTA MUNDI 0171, April 2011 • 3 A NEW SPECIES OF LUCANOBIUMlobe; basal piece and parameres short, parameres about 1/10 as long as median lobe. Median lobe stronglycurved (Fig. 3), not expanded or sclerotized at apex as in L. squamosum (Fig. 4).Variation. Female allotype and paratypes differ in the following characters. Length: 3.5-4.2 mm. Width:2.5-2.9 mm. Head: Mentum not elongate (about as wide as long). Base of maxilla (stipes/cardo) not aslarge and protuberant as in male.  Pronotum: Transverse clumps of scales more defined. Legs: Apex ofmetatibia tumidly produced ventrally. Female genitalia: Dissection of the female genitalia will becompleted by Hao Huang (Shanghai, China) for his detailed morphological study of aesaline genera thatis currently in progress.Diagnosis. This species is recognizable due to its distinct male genitalia and smaller overall size, as wellas its disparate geographic distribution. The parameres of the male genitalia are broader, and short (onlyabout 1/10th as long as the median lobe).  The median lobe is more strongly curved and not inflated at theapex as in that of L. squamosum.Etymology. The species is named for the geographic origin of the specimens, French Guiana, and theepithet is neuter in gender.AcknowledgmentsMuch appreciation goes to Joe Eger (Dow Agrosciences, Tampa, Florida), a specialist on stink bugs,for taking the time to collect and mount the Coleoptera ‘dregs’ from his light sheet. By doing so he becamethe first to make the study of this species possible, even though the number of light traps deployedannually in French Guiana by collectors is probably quite large. I also thank Paul Skelley (FSCA) forbringing the most recent specimens to my attention. Thanks to Andrew Smith (Canadian Museum ofNature) and Brett Ratcliffe (University of Nebraska State Museum) for reviewing the manuscript.Literature CitedAraya, K. 2000. An account of a visit to European museums. 2. The lucanid specimens in the van Roonand Siebold collections deposited in the Rijksmuseum van Natuurlijke Historie, Leiden. Gekkan-Mushi 350: 4-16.Howden, H. F., and J. F. Lawrence. 1974. The New World Aesalinae, with notes on the North Ameri-can lucanid subfamilies (Coleoptera, Lucanidae). Canadian Journal of Zoology 52: 1505-1510.Received March 14, 2011; Accepted April 1, 2011.

Paulsen, M.J. (2011): A second species of Lucanobium Howden and Lawrence from South America (Coleoptera: Lucanidae: Aesalinae). Insecta Mundi 2011 (171): 1-3, DOI: 10.5281/zenodo.516065

A second species of Lucanobium Howden and Lawrence from South America (Coleoptera: Lucanidae: Aesalinae)

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