I Kateretidae e i Nitidulidae (Coleoptera) dell'Italia meridionale: distribuzione attuale e ipotesi sul popolamento

Abstract

I Kateretidae e i Nitidulidae (Coleoptera) dell’Italia meridionale: distribuzione attuale e ipotesi sul popolamentoqq‘ PAOLO AUDISIO Dz'partz'mem‘o dz‘ Zoologia, Universitzi dz’ Napolz‘, Via Mezzocannone, 8 — 80134 Napoli SUMMARY All the known autochthonous species (105) of Kateretidae and Nitidulidae present in Southern Italy are schematically listed, with short notes on their general distribution and altitudinal zonation (tab. 1). The territory studied (fig. 1) has been divided into 6 primary area units (on physico-geographical, geological and vegetational criteria), in which the presence] absence of the species has been recorded. Five other area units (Northern Italy (7), Middle/ Northern Italy (8), Middle Italy (9), Sicily (10) and North-West Greece (11) have been selected as regions comparable with Southern Italy, and the presence/ absence of 47 other species (absent i.n Southern Italy) have been considered. For both computations all data have been worked out using the Baroni Urbani and Buser (1976) coefficient S**, and were clustered by middle linkage. Results are shown in tabs. 2 and 3, and figs. 2 and 3. The chorotypes of the 105 species listed in tab. 1 have been analysed, with the ’ main following results: a) 33 species (31,43%) are alpine, boreoalpine or central-european elements, more or less microthermic, mostly inhabiting the mountain vegetational belt, along the forestal areas of the Apennines; 16 of them (15 ,24%) are more or less strictly boreoalpine elements, possibly of Glacial and Pleistocenic origin, mostly attached of Abies or Pirm: forests (some of them being apparently absent along the Middle and Northern Apennine Mountains); b) 24 species (22,86%) are rnediterranean elements, more or less xerothermic, mostly inhabiting the lower ‘and warmer areas of the basal vegetational belt, or the forestal areas of the same. One element only, Meligetbes pasc/Juli: Spornraft, is strictly endemic of the Southern Italy (095%) and only three (2,86%) are endemic or subendemic of the Italian Peninsula; the percentage of elements of Eastern mediterranean and evidently transadriatic origin (6,67%) is higher than the percentage of Western mediterranean and perhaps «Tyrrhenian» elements (3,81°/o); . c) the remaining 48 species are more or less widely spreaded (european, euromediterranean, euroturanian, euroasiatic or palaearctic) forms, mostly confined to the basal vegetational belt, and without a particular biogeographical signification. A short list of some interesting new records of Kateretidae and Nitidulidae from Southern Italy (Katerete: dalmatinu: (Sturm), Brac/Jypterur curtulur W/ollaston, B. rotwzdicollix Murray, Epuraea tboracica Tournier, E. angustula Sturm, E. rufomarginata (Stephens), E. caxlanea (Duftschmid), Pityop/mgusferrugineus (Linnaeus), Glirc/Jroc/Jilu: quadrzjmnctatus (Linnaeus), Meligel/ye: rosenbaueri Reitter, M, kunzei Erichson, M. sc/Jolzi Easton) is finally given. ' INTRODUZIONE Sebbene i Kateretidae e i Nitidtilidae non siano certo tra i gruppi di Coleotteri meglio conosciuti, sia a livello sistematico, sia sotto il profilo della (*) Lavoro realizzato con contributo del C.N.R. («Gruppo nazionale di Biologia Naturalistica»), e con fondi M.P.I. 40%. 605