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Apoidea: Andrenidae: Panurginae) Contemporary distributions of Panurginus species and subspecies in Europe (Apoidea: Andrenidae: Panurginae) Sébastien Patiny Abstract The largest number of Old World Panurginus Nylander, 1848 species is distributed in the West- Palaearctic. The genus is absent in Africa and rather rare in the East-Palaearctic. Warncke (1972, 1987), who is the main author treating Palaearctic Panurginae in the last decades, subdivided Panurginus into a small number of species, including two principal taxa admitting for each a very large number of subspecies: Panurginus brullei (Lepeletier, 1841) and Panurginus montanus Giraud, 1861. Following recent works, the two latter are in fact complexes of closely related species. In the West-Palaearctic context, distributions of certain species implied in these complexes appear as very singular, distinct of mostly all other Panurginae ranges and highly interesting from a fundamental point of view. Based on a cartographic approach, the causes which influence (or have conditioned, in the past) the observed ranges of these species are discussed. Key words: Panurginae, biogeography, West-Palaearctic, speciation, glaciation. Introduction 1841) sensu lato are studied in the present paper. In the Old World Panurginae fauna, Panurginus The numerous particularities of their distribu- Nylander, 1848 is one of the only two genera tions are characterized and discussed here. The (with Melitturga Latreille, 1809) which are limits of these distributions were proposed and distributed in the entire Palaearctic region. The related to the contemporary and past develop- genera Camptopoeum Spinola, 1843 and Panur- ments which could have caused these ranges. gus Panzer, 1806 are also represented in the East- Palaearctic (in northern Thailand), but too few Catalogue of the old world species data are available for these genera to make them of Panurginus the subject of particular considerations. From the biogeographical point of view, Panur- Panurginus Nylander, 1848 ginus is even more singular in being the only Type species: Panurginus niger Nylander, 1848 Holarctic Panurginae genus. In spite of this par- = Panurginus Nylander, 1848 ticularly wide range, most of the known Old = Scrapteroides Gribodo, 1894 World Panurginus species are concentrated in = Panurgus (Panurginus) (Nylander, 1848) in the West-Palaearctic region. Warncke (1972). As the largest part of the West-Palaearctic = Panurginus (Panurginus) Nylander, 1848 in Panurginae systematics, the knowledge of Ruz (1986) Panurginus is mainly reported in Warncke’s works (1972, 1987) and reviewed by some Panurginus albopilosus Lucas, 1849 authors (Patiny 1999, 2001, Rasmont et al. 1995, = P. annulipes Lucas, 1849 Schwarz et al. 1996). According to all authors, = P. politus Benoist, 1937 two major species groups exist (and some other = Panurgus (Panurginus) albopilosus Lucas, independant species), which were considered by 1849 in Warncke (1972) Warncke as species including a large number of Panurginus alpinus Warncke, 1972 subspecies. = Panurgus (Panurginus) montanus alpinus The taxa Panurginus montanus Giraud, 1861 Warncke, 1972 sensu lato and Panurginus brullei (Lepeletier, Panurginus alticolus Morawitz, 1876 Proc. 13th Int. Coll. EIS, September 2001: pp. 115-121 (2003) 115 Proceedings 13th international colloquium European Invertebrate Survey, Leiden, 2-5 September 2001 = Panurgus (Panurginus) montanus alticolus and P. tunensis. These ranges characterize the Morawitz, 1876 in Warncke, 1972 three kinds of Panurginus distribution in the Panurginus annulatus (Sichel, 1859) western part of the Mediterranean basin. Panur- = P. difformis Gribodo, 1894 ginus albopilosus is typically Ibero-Maghrebian, = P. halictoides Gribodo, 1861 P. annulatus is strictly Spanish and P. tunensis is = Panurgus (Panurginus) brullei annulatus only Maghrebian. (Sichel, 1859) in Warncke, 1972 Fig. 3 shows the distribution of P. labiatus and Panurginus brullei (Lepeletier, 1841) P. lactipennis in the Balkan and Turkey. Panurginus clarus Warncke, 1987 Fig. 4 shows the distribution of four species = Panurgus (Panurginus) brullei clarus pooled by Warncke in the Panurginus montanus Warncke, 1987 complex: P. alpinus, P. montanus, P. sericatus Panurginus corpanus Warncke, 1972 and P. tyrolensis. These species exhibit a strong Panurginus herzi Morawitz, 1892 typicity of their distributions in the different = Panurgus (Panurginus) montanus herzi Alpine and Balkanic mountain chains. Panur- Morawitz, 1892 in Warncke, 1972 ginus alpinus is a French species, the most occi- Panurginus labiatus (Eversmann, 1852) dental of the complex. Panurginus montanus and = Panurgus labiatus Eversmann, 1852 P. sericatus have a wider and more eastern distri- = Panurgus clypeatus Eversmann, 1852 bution in the Alpine chain. Panurginus tyrolensis = P. arenarius Schenck, 1861. is a Balkanic taxon. Panurginus lactipennis Friese, 1897 Panurginus minutulus Warncke, 1987 Discussion Panurginus montanus Giraud, 1861 Panurginus species are not uniformly distributed Panurginus ponticus Warncke, 1972 in the West-Palearctic and around the Medi- = Panurgus (Panurginus) montanus ponticus teranean basin. The generic distribution presents Warncke, 1972 three large disjunctions (fig. 1): a first one be- Panurginus picipes Morawitz, 1890 tween the Alps and Spain (including the Panurginus romani Aurivillius, 1914 Pyrenees), an other at the Transdanubian plain Panurginus schwarzi Warncke, 1972 between the Alpine and Balkanic populations = Panurgus (Panurginus) brullei schwarzi and the third between western Lybia and south- Warncke, 1972 ern Israel. All these disjunctions must not be con- Panurginus sericatus Warncke, 1972 sidered a priori as homologous and have to be = Panurgus (Panurginus) montanus sericatus explained by clear argumentations. Warncke, 1972 The absence of Panurginus between Spain and Panurginus tunensis Warncke, 1972 the Alps (fig. 1) is easily understandable and may = Panurgus (Panurginus) brullei tunensis be described as the consequence of the character- Warncke, 1972 istics of the different taxa. Firstly, the Iberian spe- Panurginus turcomanicus Popov, 1936 cies (fig. 2) generally are strongly xerophylous = Panurgus (Panurginus) brullei bytinski and thermophylous (Patiny 2001, Patiny & Warncke, 1972 Gaspar 2000). In France the climatic conditions Panurginus tyrolensis (Richards, 1932) rarely are favourable for these species, even in the = Panurgus (Panurginus) montanus tyrolen- Mediterranean area. Secondly, their distribution sis (Richards, 1932) in Warncke, 1972 is restricted by the Pyrenean obstacle which only allows the migration of such species from time to The distribution of Panurginus time, for example in particular climatic configu- around the Mediterranean basin rations. In the east, the French Panurginus spe- The distribution of the genus Panurginus around cies (fig. 4) is strictly a mountain taxon which is the Mediterranean basin is shown in fig. 1. unknown below 1500m altitude and apparently Fig. 2 shows the distribution of three species missing in the Pyrenees. These observations sug- associated by Warncke in the Panurginus brullei gest that the central part of France is quite un- complex: Panurginus albopilosus, P. annulatus favourable to Panurginus expansion. 116 Patiny - Contempory distributions of Panurginus species and subspecies in Europe Figure 1 Distribution of the genus Panurginus around the Mediterranean basin. Figure 2 Distribution of three species of the Panurginus brullei complex: Panurginus albopilosus, P. annulatus and P. tunensis. The second disjunction in the generic distribu- The altitude can be considered to be the limiting tion is centered at the level of the Transdanubian factor of the concerned distributions. In cases of plain (fig. 1, 3, 4). Once again, the mountain cha- other species, we could also consider that the racter of the P. montanus species group (fig. 4) observed interruption can be the consequence of may reliably explain the absence of these species a lack of data. For example, Panurginus labiatus in the plain. Endemic species related to P. mon- (fig. 3) is not a typical mountain species but it is tanus occur in the entire area surrounding this also distributed on each side of the disjunction. It plain but none of those is found in the plain itself. seems likely that this disjunction can at least for 117 Proceedings 13th international colloquium European Invertebrate Survey, Leiden, 2-5 September 2001 Figure 3 Distribution of Panurginus labiatus and Panurginus lactipennis in the Balkan and Turkey. Figure 4 Distribution of four species of the Panurginus montanus complex: Panurginus alpinus, P. montanus, P. sericatus and P. tyrolensis. some taxa be explained by a lack of data. can be considered to act against a larger distribu- Panurginus species are not known between tion of the species in this part of North-Africa. In western Lybia and southern Israel (fig. 1, 2). Dis- some other groups (for example in Panurgus junctions of ranges in this part of North-Africa Panzer, 1806) some intermediar isolated areas have been observed in numerous other groups. (this area is characterized by a high level of ende- The relatively greater extension of the Sahara mism, notably in Cyrenaika) and a wider distri- (and more generally this of desert ecosystems) bution in eastern Egypt are observed. Perhaps 118 Patiny - Contempory distributions of Panurginus species and subspecies in Europe this could also be revealed for Panurginus by an strictly distributed in Turkey and the oriental improvement of
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