MATERIALS AND METHODS

The holotype PIMUZ T4763 and the referred specimen PIMUZ T58 from the Upper Besano Formation ('Obere Grenzbitumenzone'; Anisian/Ladinian boundary) of Monte San Giorgio, both presumably adult specimens (Figure 2) and the only material of Cyamodus hildegardis showing largely articulated postcranial armour were reinvestigated. Data from the juvenile specimen MSNM V458 from the "Scisti Bituminosi" (='Grenzbitumenzone') of Pogliana near Besano, Lombardy, previously described and pictured by Pinna (1980, 1992) were taken into account as well, although the armour is yet in an early stage of development (Figure 3). The PIMUZ material was further compared to the published accounts on the postcranium of adult specimens of Psephoderma alpinum (Pinna and Nosotti 1989; Renesto and Tintori 1995; Rieppel 2002).

Institutional Abbreviations

BSP, Bayerische Staatssammlung für Paläontologie und Geologie, Munich, Germany; FAFI, Magayar Allami Földtani Intézet (Geological Institute of Hungary, Budapest) Budapest, Hungary; Gmr, specimens collected by the Geological Survey of Guizhou, Guiyang, China – currently with the government of Guanling County, southwestern Guizhou Province, China; GPIT, Geologisches und Paläontologisches Institut der Universität Tübingen, Germany; MCSNB, Museo di Scienze Naturali di Bergamo, Italy; MSNM, Museo Civico di Storia Naturale di Milano, Italy; PIMUZ, Paläontologisches Institut und Museum, Universität Zürich, Switzerland; ZMNH, Zhejiang Museum of Natural History, Hangzhou, China.