Nejdia (Hildoceratidae, Ammonoidea) in the Toarcian (Lower Jurassic) of the Iberian Peninsula. Systematics, phylogenetic affinities and palaeobiogeography

Abstract

The genus Nejdia Arkell, 1952 has rarely been cited outside the Arabo-Malgach Province and, few specimens have been recorded outside this province. On the Iberian Peninsula it has been identified in three sites, two of these in the southwest of the Iberian Basin and one in the Lusitanian Basin. Three species are described: N. cf. bramkampi, N. pseudogruneri and N. duartei sp. nov., Following the indications of the journal the new species was recorded in the ZooBank recorded in the interval between the upper part of the Serpentinum Chronozone, where they are associated with Harpoceras falciferum and Orthildaites douvillei and the lower part of the Bifrons Chronozone containing Hildoceras sublevisoni. In all the Iberian outcrops having a record of Nejdia, the fossils constitute ademic or parademic taphonic entities, as there is no evidence to indicate that the known populations inhabited an area close to the southwest sector of the Iberian Range, or the northern part of the Lusitanian Basin, where were recorded. With the specimens obtained in Portugal, the known geographic distribution of the genus Nejdia is extended, currently comprising, apart from the Arabo-Malgach Province, the Iberian Range and the Lusitanian Basin in the Submediterranean Province, and the Middle Atlas and the Apennines in the Mediterranean Province.