Origin and the Early Evolution of the Phylum Mollusca
- Авторлар: Parkhaev P.1
-
Мекемелер:
- Borissiak Paleontological Institute
- Шығарылым: Том 51, № 6 (2017)
- Беттер: 663-686
- Бөлім: Article
- URL: https://journals.rcsi.science/0031-0301/article/view/167237
- DOI: https://doi.org/10.1134/S003103011706003X
- ID: 167237
Дәйексөз келтіру
Аннотация
The paper gives an overview of the modern hypotheses on the origin of the phylum Mollusca and the formation of its main classes. The Cambrian stage of molluscan evolution is characterized based on the paleontological material. The doubtfulness of assignment of the Precambrian (Vendian) soft-bodied fossil Kimberella to mollusks is argued. Judging from the interpretation of the morphologically diverse Cambrian fossils, it is suggested that the classes Polyplacophora, Monoplacophora, Gastropoda and Bivalvia formed already near the Precambrian–Cambrian boundary, i.e., from the beginning of the paleontologically documented evolutionary history of the phylum, whereas the assumption of the later origin of these taxa is unconvincing. The remaining classes of mollusks arose later, i.e., Cephalopoda, in the Late Cambrian; Scaphopoda, in the Ordovician; and Aplacophora, in the Silurian.
Негізгі сөздер
Авторлар туралы
P. Parkhaev
Borissiak Paleontological Institute
Хат алмасуға жауапты Автор.
Email: pparkh@paleo.ru
Ресей, Moscow, 117647