A new cyrtocrinid is described from Bajocian sediments of central Italy and named Ninocrinus parvulus n.gen. n.sp. The characters of the new taxon suggest close relationships with eugeniacrinitids and phyllocrinids but also with saccocomids, such relationships could suggest deep changes in the Systematics. After a short analytic review reiterative evolutionary model for free-living Articulata is also hypothesized.
A new cyrtocrinid crinoid from Middle Jurassic of Central Italy / M., Castellana; Manni, Riccardo Pier Celestino; Nicosia, Umberto. - In: ATTI DELLA SOCIETÀ DEI NATURALISTI E MATEMATICI DI MODENA. - ISSN 0365-7027. - STAMPA. - 121(1990):(1992), pp. 17-26.
A new cyrtocrinid crinoid from Middle Jurassic of Central Italy
MANNI, Riccardo Pier Celestino;NICOSIA, Umberto
1992
Abstract
A new cyrtocrinid is described from Bajocian sediments of central Italy and named Ninocrinus parvulus n.gen. n.sp. The characters of the new taxon suggest close relationships with eugeniacrinitids and phyllocrinids but also with saccocomids, such relationships could suggest deep changes in the Systematics. After a short analytic review reiterative evolutionary model for free-living Articulata is also hypothesized.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
