Les trilobites de l'ordovicien moyen du synclinorium de Martigné-Ferchaud, Ille-et-Vilaine (2)

National audienceOccurring in the Martigné-Ferchaud synclinorium (Ille-et-Vilaine, France), the Traveusot Formation is famous for its diverse Middle Ordovician trilobite fauna. After the presentation of those dark siltstones and some of mostly fossiliferous occurrences in the first issue of "Fossiles" (Lebrun et al., 2010), this palaeontological part describe all the trilobite species discovered yet, with short introduction for each families: agnostids' Metagnostidae (? Geragnostus), illaenoids' Panderidae (Panderia) and Illaenidae (Ectillaenus), lichoids' Lichidae (Uralichas), odontopleuroids' Selenopeltidae (Selenopeltis), calymemines' Calymenidae (Colpocoryphe, Salterocoryphe, Neseuretus), Homalonotidae (Plaesiacomia) and Bathycheilidae (Bathycheilus, Prionocheilus), phacopines' Dalmanitidae (Eodalmanitina, Guichenia, Retamaspis, Zeliszkella, Phacopidina, Toletanaspis) and Acastidae (Kloucekia), cheirurines' Cheiruridae (Eccoptochile, Pateraspis, Placoparia), asaphoids' Asaphidae (Isabelinia, Nobiliasaphus, Asaphellus, Ogyginus), cyclopygoids' Nileidae (Parabarrandia), trinucleoid's Dionididae (Dionide), remopleuridoid's Hungaiidae (Hungioides), and harpine's Harpetidae (Eoharpes)