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Pycnomerus Thrinax, a New North America Zopherid (Coleoptera)

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Pycnomerus Thrinax, a New North America Zopherid (Coleoptera) University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Center for Systematic Entomology, Gainesville, Insecta Mundi Florida December 2000 Pycnomerus thrinax, a new North America zopherid (Coleoptera) Michael A. Ivie Montana State University, Bozeman, MT Stanislaw Adam Slipinski CSIRO Division of Entomology, Australia Follow this and additional works at: https://digitalcommons.unl.edu/insectamundi Part of the Entomology Commons Ivie, Michael A. and Slipinski, Stanislaw Adam, "Pycnomerus thrinax, a new North America zopherid (Coleoptera)" (2000). Insecta Mundi. 310. https://digitalcommons.unl.edu/insectamundi/310 This Article is brought to you for free and open access by the Center for Systematic Entomology, Gainesville, Florida at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Insecta Mundi by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. INSECTA MUNDI, Vol. 14, No. 4, December, 2000 225 Pycnomerus thrinax,a new North America zopherid (Coleoptera) Michael A. Ivie Department of Entomology Montana State University Bozeman, MT 59717, USA [email protected] and Stanislaw Adam Slipinski CSIRO Division of Entomology GPO Box 1700, Canberra ACT 2601, AUSTRALIA, [email protected] Abstract. Pyc7zomerus thrilzax Ivie and Slipinski NEW SPECIES is described from the Florida Keys (USA), where it is found in rotting stems of the thatch palm, Thrinaxparuiflora Sw. Illustrations and modifications to existing keys are provided. Introduction American P. iizfimus Grouvelle, an undescribed species from Queensland [Australian National Col- Slipinski and Lawrence (1999) established the lection of Insects, labeled "dead palm fronds of relationship of the Pycnomerini, previously placed Licuala ramsayi"], one from Baja Verapaz, Guate- as a tribe of the Colydiidae (Ivie and Slipinski 1990), mala [Canadian Museum of Nature, Ottawa], la- with the Zopherinae lineage of a reconstituted Zo- beled "in dead tree fern fronds"] and another from pheridae. Pycizomerus Erichson is the largest genus the Seychelles [Museum National #Histoire Na- in the family Zopheridae (sensu Slipinski and turelle, Paris]. Direct and indirect evidence indi- Lawrence 1999), with many undescribed species in cates that there may be a potentially large circum- collections and the indication of many more to be tropical group of these tiny cryptic Pycnomerus discovered. No world revision is available for Pycno- associated with the decaying ribs of dead palm merus, but in the last few decades regional reviews fronds. We describe this new species in order to have been published for North America (Stephan have the name available before publication of the 1989), the West Indies (Ivie and Slipinski 1989),the upcoming American Beetles, Volume 11, and to call Palearctic (Dajoz 1977), Madagascar (Dajoz 1980), attention of this cryptic association for others able and the Juan Fernandez Islands (Pope 1955). to investigate the fauna of dead palm fronds around Specialized collecting by Robert Anderson and the world. Stewart Peck in the Florida Keys (USA) has yielded an interesting and previously unknown member of Pycnomerus thrinax Ivie and Slipinski the genus associated with the thatch palm, Thrinax NEW SPECIES parviflora Sw. Robert Anderson reports that the "adults were in the drier fibrous material in the Pycnomerus n. sp. Peck and Thomas 1998: 104. dead, central stems of the fallen or hanging fronds of Thrinax parviflora Sw." (R. Anderson in lit.). TYPE MATERIAL. Holotype male labeled: FL: Once the habitat was identified, large numbers Monroe Co.; Key Vaca, Marathon; Crane Pt. Ham- were found, indicating it is abundant, if rarely seen. mock; 17.v.90,90-24;R. S. Anderson1 in dead frond; It is one of a growing number of extremely small stalks Thrinax; parviflora Sw. [Canadian Museum Pycnoinerus that all seem to live in dead palm of Nature]. Paratypes: 62 - same data as holo- fronds, including the Lesser Antillean and South type. 22-U.S.A.: Florida, 90-127; Monroe Co., Key 226 Volume 14, No. 4, December, 2000, INSECTA MUNDI these, it can be distinguished by the lateral bulge of the elytra over the hind part of the metasternum. Further, the distinctive male genitalia will confirm this species In Stephan's key to North American Pycnomer- us, P, thrinax will key to couplet 3, where it will seem to fit P. reflexus (Say). Couplet 3' should lead to 3a as follows: 3a. Length 3-4 mm, body subcylindrical, pronotum convex .......................................P. reflexus (Say) 3a'. Length 2.3-2.8 mm, body dorso-ventrally flattened, pronotum flat ...................................................... ..............................P. thrinax Ivie and Slipinski Pycnomerus thrinax will key to P. infimus in Ivie and Slipinski's (1989) key to West Indian spe- cies. Because of the good chance this species may be Figs. 1-3) Pyozomerus thirax Ivie and Slipinski. 1) dorsal view, head and prothorax; 2) male genitalia; 3) antenna . found across the Straits of Florida in Cuba or the Bahamas, we provide the following additions for Vaca; 1 mi N. Key Colony Beach; 21.X.1990, R. S. that key: choice 7' should lead to couplet 8, as Anderson1 in dead frond; Thrinaxparviflora Sw. 3 follows: - FLA: Monroe Co; Vaca Key, Marathon; 2.VI- 1.1X.86, Sec 1; S & J Peck, hammock; malaise - 8. Pronotum longitudinally wrinkled, punctures elon- FIT86-46. 2 - FLA: Monroe Co; Fat Deer Key; gate; elytra parallel-sided .................................. ..........................................P. infimus Grouvelle 2,VIII-16.XI,85, S & J Peck; hardwood hammock; 8'. Pronotum without trace of longitudinal wrinkles, malaise-FIT. 1 - FLA: Monroe Co; Fat Deer Key; punctures round; elytralaterally expanded above 24.11-4.VI.86; S & J Peck,86-23; hammock; malaise- hind portion of metasternum ............................. FIT. 6 - FLA: Monroe Co; Fat Deer Key; 4.VI- ..............................P. thrinax Ivie and Slipinski 28.VIII.86; S & J Peck,86-24; hammock; malaise- FIT. 3 - FLA: Monroe Co; Fat Deer Key; 31.VIII- Description. Male: Light reddish-brown. Elon- 15.XII.86; S & J Peck,86-88; hammock; malaise- gate, parallel-sided except for distinct laterad bulge FIT. 1- FLA: Monroe Co; Fat Deer Key, S & J Peck; of elytra above posterior 112 of metasternum. Fully 18.X1.85-28.11.86;hammock; malaise-FIT. Paratypes winged. Head (Fig. 1) with surface simply punc- are deposited in the Australian National Insect tate, flat; anterior margin deeply emarginate, fron- Collection (Canberra), Canadian Museum of Na- tal angles distinct; frons with slightly indicated ture (Ottawa), Florida State Collection of Arthro- depressions mediad of antennal insertions. Anten- pods (Gainesville), Montana State University (Boze- na (Fig. 3) short, with distinctly 2-segmented club, man), National Museum of Natural History (Wash- antennomere 11 slightly narrower and longer than ington), Museum National $Histoire Naturelle (Par- 10. Eye normal sized; antennal groove very short. is), Muzeum i Instytut Zoologii (Warsaw), Natural Submentum lacking ciliate fovea. Pronotum (Fig. History Museum (London), and University of Kan- 1, 4) slightly longer than broad; sides weakly con- sas Natural History Museum (Lawrence). verging to base from just behind frontal angles; Diagnosis. The very small size and flat, un- lateral margins smooth, very fine, without accom- grooved pronotum distinguish this species from panying punctures; anterior angles narrowly round- other North American species. From P. infimus it ed; posterior angles rounded, nearly obsolete; ante- can be distinguished by the very distinct and coarse rior margin straight, unmodified; posterior margin pronotalpunctation (Fig. 4), and the lack of any hint arcuate, finely grooved. Disc flat, glossy, coarsely, of the longitudinal wrinkling so characteristic of P. simply, punctate (in some individuals narrowly im- infimus (Fig. 5). The most similar species we have punctate medially, subserially punctate to each side seen to date is an undescribed species from Queen- of this area). Prosternum flat, finely punctate, un- sland, Australia, but that species has much sparser modified. Elytra nearly 3.OX as long as wide, flat, and larger punctures on the venter. From both sinuate laterally at level of hind part of metaster- INSECTA MUNDI, Vol. 14, No. 4, December, 20( Figs. 4-5. Pronoturn. 4. Pycnomerus thirax Ivie and Slipinski; 5. Pycnomerus infimus Grouvelle num; anterior margin not bordered; striae narrow, Bassin Mkditerranhen, No. 8. Masson, Paris. uniform, finely and regularly punctate; interstriae 275 pp. flat, glossy. Abdomen coarsely punctate, last ven- Dajoz, R. 1980. Insectes Col6opt&res:Colydiidae et trite flat. Genitalia as in Fig. 2. Cerylonidae. Faune de Madagascar 54: 1-256. Female: no external differences were noted. Ivie, M. A., and S. A. Slipinski. 1989. The Pycno- Length 2.3 - 2.8 mm. merini (Coleoptera: Colydiidae) of the West In- dies. Florida Entomologist 72: 64-80. Etymology. The species name is derived from the Ivie, M. A., and S. A. Slipinski. 1990. Catalog of generic name of the thatch palm Thrinaxparviflora the genera of world Colydiidae (Coleoptera). Sw. (Palmacae). Annales Zoologici (Warsaw) 43 (suppl. 1): 1-32. Peck, S. B., and M. C. Thomas. 1998. A distribu- Acknowledgments tional checklist of the beetles (Coleoptera) of Florida. Arthropods of Florida and Neighboring We would like to thank R. S. Anderson and F. Land Areas 16: i-viii + 1-180. G6nier of the Canadian Museum of Nature, Karl Pope, R. D.
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