Nesotrinchus Obenberger, 1924

Bílý, Svatopluk, Kubáň, Vítězslav & Volkovitsh, Mark G., 2009, A study on the tribe Poecilonotini, with a revision of the subtribe Nesotrinchina subtrib. nov. and the description of a new genus and species from Papua New Guinea (Coleoptera: Buprestidae: Chrysochroinae), Acta Entomologica Musei Nationalis Pragae 49 (2), pp. 729-767 : 754

Genus Nesotrinchus Obenberger, 1924 , stat. restit.

( Figs. 71–97, 110, 116–119, 121, 127)

Nesotrinchus Obenberger, 1924: 12 (in Buprestini : Dicercites), pl. 1, Fig. 2, pl. 2, Figs. 10–12, 14. Type species: Nesotrinchus simondsi Obenberger, 1924 , by original designation.

Nesotrinchus: THÉRY (1925) : 225 (as Nosotrinchus [sic!] – incorrect subsequent spelling; comment; synonym of Haplotrinchus ); OBENBERGER (1926a): 97 (characters; comment; as valid genus); OBENBERGER (1930): 359 (catalogue; in Buprestini : Dicercites); THÉRY (1937): 38, 39 (as Nosotrinchus [sic!]; characters); THÉRY (1943): 646 (as Nosotrinchus [sic!]; list of species; synonymy); BELLAMY (1985): 419 (catalogue; in Buprestinae : Dicercini ); BELLAMY (1986): 595 (catalogue; in Buprestinae : Dicercini ); BELLAMY (1987): 595 (comment; in Buprestinae : Dicercini ); HOŁYŃSKI (1993): 27 (comment; as valid genus near to Melobasina , not as synonym of Melobasina ; in Buprestinae : Buprestini : Haplotrinchina ); BELLAMY (1997): 76 (as synonym of Melobasina – misinterpretation of HOŁYŃSKI (1993: 27); in Buprestinae : Buprestini : Haplotrinchina ); VOLKOVITSH (2001): 55 (catalogue; in Chalcophorinae [now Chrysochroinae ]: Poecilonotini : ‘ Nesotrinchus generic group’) 96 (characters); BELLAMY (2002):62 (catalogue; as synonym of Melobasina – misinterpretation;in Buprestinae : Psilopterini : Haplotrinchina ); BELLAMY (2003): 41 (catalogue; as synonym of Melobasina – misinterpretation; in Chrysochroinae : Poecilonotini : ‘ Nesotrinchus generic group’); BELLAMY (2008): 624 (catalogue; as synonym of Melobasina – misinterpretation; in Chrysochroinae : Poecilonotini : ‘ Nesotrinchus generic group’).

Diagnosis. The genus is characterised by a strongly caudiform elytral apex ( Figs. 71, 77, 79, 82, 90); strongly developed supraantennal carinae with frons deeply depressed between them ( Figs. 75, 86, 94, 110); pronotum conical and usually with prominent, more or less distinct lateral knoll at midlength or anteriad of posterior angles ( Figs. 71, 77, 79, 82, 90); anal ventrite of female sharply trispinose ( Figs. 76, 87, 95); visible abdominal tergites moderately transverse, terminal tergite (T7) longer than wide; wing ( Fig. 121) with anal veins AA 4 +AA 3b +AP 1+2 and AP 3a free and aedeagi as in Figs. 117–119.

Remarks. BELLAMY (2002, 2003, 2008) formally transferred all Nesotrinchus species to the genus Melobasina due to a misinterpretation of the work by HOŁYŃSKI (1993: 27) (see above). ‘ Buprestis wallisii Montrouzier, 1855 ’ (type locality: Pacific Islands: Wallis Island) was placed in the most catalogues ( KERREMANS 1903, OBENBERGER 1930, BELLAMY 2008) into the genus Haplotrinchus but in parallell also into the genus Paracupta Deyrolle, 1864 (now in Chrysochroinae : Chalcophorina ) ( KERREMANS 1903, OBENBERGER 1926b).As mentioned already by FAIRMAIRE (1881), this species is most probably similar to N. caeruleipennis ( Fairmaire, 1877) due to its size (ca. 13.0 mm) and characters mentioned in the original description. We also suppose that this species is congeneric with other species of the genus Nesotrinchus ; this genus forms a very compact taxon distributed only on the Pacific archipelagos of Fiji and Tonga and on the islands of Niue and Wallis.