A new subtribe for Tvichinorhipis Barr, 1948 (Coleoptera: Buprestidae)

THE PAN-PACIFIC ENTOMOLOGIST 82(2): 139-143, (2006) A new subtribe for Tvichinorhipis Barr, 1948 (Coleoptera: Buprestidae) C. L. BELLAMY Plant Pest Diagnostic Laboratory, California Department of Food & Agriculture, 3294 Meadowview Road, Sacramento, California 95832, U.S.A. e-mail: cbellamy@cdfa.ca.gov Abstract. A new subtribe, Trichinorhipidina, is erected for the monotypic genus Trichinorhipis Barr, 1948. This taxon is distinguished from the nominate Xenorhipidina (Xenorhipidini Cobos, 1986) and photographs of the three genera: Trichinorhipis, Xenorhipis LeConte, 1866 and Hesperorhipis Fall, 1930, are given. Key Words. Coleoptera, Buprestidae, Xenorhipidini, Trichinorhipis, new subtribe. The monotypic genus Trichinorhipis Barr, 1948 has traditionally been grouped with the genera Xenorhipis Leconte, 1866 and Hesperorhipis Fall, 1930 in the tribe Xenorhipidini Cobos, 1986 until Volkovitsh (2001) separated these genera into the informal Xenorhipis and Trichinorhipis generic groups. The other two genus-group names Lamesis Westwood, 1883 and Isophaenus Waterhouse, 1882 formerly included with these three valid names have been synonymized under Xenorhipis by Bellamy (1 998, 2005) respectively. Considering the differences between Xenorhipis and Hesperorhipis on one hand, and Trichinorhipis on the other, a new subtribe is proposed herein as the logical next step following the conclusions of Volkovitsh (2001), building on the differences observed in that work that were primarily based on antenna1 morphology. In remembering Gayle Nelson and his contributions to "buprestology" in this issue of The Pan-Pacific Entomologist, I note that Gayle, Bill Barr and I share the distinction of having collected the only three wild-caught adult specimens of Trichinorhipis krzulli Barr, 1948, one specimen by each of us; all other specimens have been reared. The following abbreviations are used in the text: CASC = California Academy of Sciences Collection; CLBC = my research collection. Type genus: Trichinorhipis Barr, 1948 Trichinorhipidina, subtribe nov. Description. Body subcylindrical, robust, black with single white elytral fasciae; tibiae and tarsi brunneous; head, pronotum with irregular areolate-alveolate punctures; pronotum striatopunctate, with individual punctures large, elongate; surface more or less uniformly covered with short, semi-erect white setae one from each dorsal puncture; ventral surface with moderately spaced longer, semi-erect setae; antennomeres more elongate, more strongly flattened, testaceous, with sparse, erect, elongate setae; 8 pectinate from antennomere 4 (Fig. 3); 9 elongate subtriangularly serrate from 4; pronotum transversely convex, with vague pair of medial depressions in anterior half; widest medially, lateral margins strongly, evenly arcuate, strongly convex, without any lateral carina; posterior margin entire; scutellum small, rounded triangle; elytra entire, although in male not quite long

2006 BELLAMY: NEW SUBTRIBE FOR TRICHINORHIPIS 141 Table 1. Character state differences between Trichinorhipidina and Xenorhipidina. Character State Character Trichinorhipidina Xenorhipidina General body shape Color Surface sculpture General vestiture Antennae Pronotum Scutellum Elytra Thoracic ventrites Abdomen subcylindrical, robust (Figs. 1, 2) black with single white elytral fasciae; tibiae and tarsi brunneous head, pronotum with irregular areolate-alveolate punctures; pronotum striatopunctate surface more or less uniformly covered with short, semi-erect white setae one from each dorsal puncture; ventral surface with moderately spaced longer, semi-erect setae antennomeres more elongate, more strongly flattened, testaceous, with sparse, erect, elongate setae; 8 pectinate from antennomere 4 (Fig. 3);? elongate subtriangular serrate from 4 transversely convex, with vague pair of medial depressions in anterior half; widest medially, lateral margins strongly, evenly arcuate, strongly convex, without any lateral carina; posterior margin entire small, rounded triangle entire, although not quite long enough to conceal distal portion of abdomen in 8 prosternal process very short, extending only to opposite posterior extent of procoxae (Fig. 9a); mesosternum appearing fused with visible longitudinal excavation (Fig. 9b); 8,? metasternum entire 1st visible ventrite nearly as long as 2 + 3; 5 evenly arcuate distally strongly flattened, slender (Figs. 5-8) black, often partly or completely with one or more iridescent colors, with or without white elytral fasciae; sometimes very distinctly sexually dichromatic; legs black or with iridescent color dorsal surface irregularly asperate dorsal surface with very short, sparse erect setae visible only at loox +; ventral surface with moderately spaced longer, larger semi-erect setae antennomeres more compact, more robust; piceous, with dense, very short setae; 8 flabellate from antennomere 2 (Xenorhipis) (Fig. 4) or 3 (Hesperorhipis);? short, widest at midpoint, 3,4 subserrate serrate from 5 transversely flattened, disc entire; lateral margins feebly arcuate, subparallel, widest anterior to midpoint; lateroposterior carinae extend from posterior margin to near midpoint; posterior margin feebly sinuate relatively large, rounded trapezoid entire (Xenorhipis), not long enough to conceal distal portion of abdomen or shortened (Hesperorhipis) prosternal process elongate, extending to about midpoint between mesosternal lobes (Fig. loa), which are well-developed with the cavity between reaching to posterior margin (Fig. lob); 8 metasternum with large, oblique depression with dense setae (Fig. 10e);? entire 1st visible ventrite very slightly longer than 2; 5 strongly, deeply emarginate distally enough to conceal distal portion of abdomen; thoracic ventrites: prosternal process very short, extending only to opposite posterior extent of procoxae; mesosternurn appearing fused with visible longitudinal excavation; 8,? metasternum entire; abdominal ventrites 1st visible ventrite nearly as long as 2 + 3, 2-5 subequal in length; 5 evenly arcuate distally.

142 THE PAN-PACIFIC ENTOMOLOGIST Vol. 82(2) Comments. Trichinorhipidina can be distinguished from Xenorhipidina as tabulated below. Genus Trichinorhipis Barr, 1948 Trichinorhipis Barr 1948:70; Cobos 1964:8 1; Hespenheide 1975:780; Akiyama 1980:8; Nelson 1982:445; Bellamy 1985:421; Cobos 1986: 136; Poole & Gentili 1996:73; Bily 2000: 11 1; Bellamy & Nelson 2002:108; Bellamy 2003:69. Type species: Trichinorhipis knulli Barr, 1948 (original designation). Remarks. This genus is technically monotypic, although there is an undescribed species from West Texas apparently associated with a species of Tiquilia (Boraginaceae) in the Big Bend area (R. K. Velten, personal communication). Trichinorhipis knulli Barr, 1948 (Figs. 1-3, 9) Trichinorhipis knulli Barr 1948:7 1 ( 8 description); Nelson 1962:58 (? description); Helfer 1970: 100; Akiyama 1980:8 (hunlli, lapsus calami); Nelson et al. 198 1 : 148 (larval host record); Bellamy 1982:360 (adult host record); Poole & Gentili 1996:73. Specimens Examined. Holotype 8 (CASC-85 15); 1 8 (CLBC): California, Imperial Co., Frink Springs, beating Prosopis; ca. 16 8 8, 10?? (CLBC): Imperial Co. vic. Mountain Springs, reared from Simmondsia chinensis, by D. S. Verity, R. K. Velten and myself. Remarks. This species has been reared from jojoba (Simmondsia chinensis (Link) C. Schneider, Simmondsiaceae) in western Imperial County and eastern San Diego County, Mountain Springs and vicinity of Jacumba (Nelson et al. 1981). It very likely occurs in the same habitat south of the U.S./Mexican border in adjacent northern Baja California and probably further north into Riverside and San Bernardino counties. I would like to thank two anonymous reviewers for suggestions that helped improve this paper. I would also like to remember Gayle Nelson for the example of his published work, his collecting prowess and his work ethic which inspired me to try harder in the same facets of my work. Akiyama, K. 1980. [Notes on buprestidae (JI). Report of the genus Xenorhipis and its allied genera (Coleoptera, Buprestidae)]. Gekkan-Mushi 115:6-8. [in Japanese] Barr, W. F. 1948. A new genus and species of Buprestidae from Southern California (Coleoptera). Entomological News 59(3):69-72. Bellamy, C. L. 1982. Observations on the biology and distribution of several species of Buprestidae (Coleoptera). The Coleopterists Bulletin 36(2):358-361. Bellamy, C. L. 1985. A catalogue of the higher taxa of the family Buprestidae (Coleoptera). Navorsinge van die Nasionale Museum, Bloemfontein 4(15):405472. Bellamy, C. L. 1998. The genus Lamesis Westwood, family placement and synonymy. The Coleopterists Bulletin 52(1):97. Bellamy, C. L. 2003. An illustrated summary of the higher classification of the superfamily Buprestoidea (Coleoptera). Folia Heyrovskyana Supplementum 10, 197 pp, 44 plates. Bellamy, C. L. 2005. New synonymy in Buprestidae (Coleoptera). The Coleopterists Bulletin 59(1):26.

2006 BELLAMY: NEW SUBTRIBE FOR TRICHINORHIPIS 143 Bellamy, C. L. & G. H. Nelson. 2002. Chapter 4 1. Buprestidae Leach 18 1 5, pp. 98-1 12. In: R. H. Arnett, Jr., M. C. Thomas, P. E. Skelley & J. H. Frank (Eds.). American Beetles Volume 2, CRC Press. Bily, S. 2000. A new concept of Anthaxiini (Coleoptera: Buprestidae). Folia Heyrovskyana 8(2): 109-1 14. Cobos, A. 1964. Extension del gcnero Xenorhipis a la fauna neotropical (Coleoptera, Buprestidae). Revista Brasileira de Biologia 24(1):77-82. Cobos, A. 1986. Fauna Iberica de Coleopteros Buprestidae. Consejo Superior de Invertigaciones Cientificas, Madrid, pp. 1-364. Helfer, J. R. 1970. The Natural History of Mendicino. Published by the author, 159 pp. Hespenheide, H. A. 1975. Reversed sex-limited mimicry in a beetle. Evolution 29(4):780-783. Nelson, G. H. 1962. Notes on the Buprestidae: part 111. Bulletin of the Brooklyn Entomological Society 7:56-60. Nelson, G. H. 1982. A new tribe, genus and species of North American Buprestidae with consideration of subfamilial and tribal categories. The Coleopterists Bulletin 35(4)(1981):43 1450. Nelson, G. H., D. S. Verity & R. L. Westcott. 1981. Additional notes on the biology and distribution of Buprestidae (Coleoptera) of North America. The Coleopterists Bulletin 35(2):129-151. Poole, R. W. & P. Gentili (Eds.). 1996. Nomina Insecta Nearctica, Volume 1: Coleoptera, Stresiptera. Entomological Information Services, Rockville, Maryland, 827 pp. Volkovitsh, M. G. 2001. The comparative morphology of antenna1 structures in Buprestidae (Coleoptera): evolutionary trends, taxonomic and phylogenetic implications. Part 1. Acta Musei Moraviae, Scientiae biologicae (Brno) 86:43-169. Received 11 Oct 2005; Accepted 12 Dec 2005. Publication date 24 Sept 2006.