New paleontological data on Sestrosphaera liasina (Pia) based on material collected in the type-locality, Malga Mandrielle (Italian Southern Alps) are supplied. All the features of the alga are reexamined; the occurrence in the stalk region of an unusual primary lateral inner swelling is confirmed. The structure formed by the inner enlarged portion of the laterals is here indicated as inner pseudocortex. A new diagnosis of S. liasina is proposed and a lectotype is chosen from Pia’s material. Finally, a paleontological reconstruction is supplied taking into account all the main biometrical values.
Note on Sestrosphaera liasina (Pia, 1920) from the Lowermost Jurassic of Malga Mandrielle (type-locality, Southern Alps – Italy) / Romano, R.; Barattolo, Filippo. - In: GEOBIOS. - ISSN 0016-6995. - STAMPA. - 42:(2009), pp. 101-115. [10.1016/j.geobios.2008.07.005]
Note on Sestrosphaera liasina (Pia, 1920) from the Lowermost Jurassic of Malga Mandrielle (type-locality, Southern Alps – Italy)
BARATTOLO, FILIPPO
2009
Abstract
New paleontological data on Sestrosphaera liasina (Pia) based on material collected in the type-locality, Malga Mandrielle (Italian Southern Alps) are supplied. All the features of the alga are reexamined; the occurrence in the stalk region of an unusual primary lateral inner swelling is confirmed. The structure formed by the inner enlarged portion of the laterals is here indicated as inner pseudocortex. A new diagnosis of S. liasina is proposed and a lectotype is chosen from Pia’s material. Finally, a paleontological reconstruction is supplied taking into account all the main biometrical values.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
