Taxonomic interpretation and sexual dimorphism in the Early Cretaceous (Valanginian) ammonite Valanginites nucleus (ROEMER, 1841)

• Autorzy: Ploch I.
• Języki publikacji: EN

Abstrakty

EN

Sexual dimorphism in the Valanginian ammonite Valanginites nucleus (ROEMER, 1841), is recognised in the material from Wąwał, Central Poland. Two sexes, differing in size and number of ribs are distinguished. Intraspecific ornament variation is linked to sexual dimorphism. Three morphotypes (nucleus, wilfridi and ventrotuberculatum) occur along with forms intermediate between these morphotypes. In all the morphotypes two sexes were found. Valanginites bachelardi is interpreted as the microconch of the nucleus morphotype.

Słowa kluczowe

EN

Central Poland; Intraspecific variation; sexual dimorphism; Valanginites nucleus; Wąwał section

• Wydawca: Faculty of Geology of the University of Warsaw ; Komitet Nauk Geologicznych PAN
• Czasopismo: Acta Geologica Polonica
• Rocznik: 2003
• Tom: Vol. 53, nr 3
• Strony: 201--208
• Opis fizyczny: Tabl. 3, tab., wykr.,

Twórcy

autor

Ploch I.

• Polish Geological Institute, Geological Museum, Rakowiecka Str 4, PL-00-975 Warszawa, Poland,