Physcidium Hedenäs, Bomfleur et E.M.Friis in Bomfleur, Hedenäs, Friis, Crane, Pedersen, Mendes & Kvaček

Plant Fossil Names Registry Number: PFN003146

Act LSID: urn:lsid:plantfossilnames.org:act:3146

Authors: L. Hedenäs, B. Bomfleur & E. M. Friis

Rank: genus

Reference: Bomfleur, B., Hedenäs, L., Friis, E. M., Crane, P. R., Pedersen, K. R., Mendes, M. M. & Kvaček, J. (2023): Fossil Mosses from the Early Cretaceous Catefica mesofossil flora, Portugal – a window into the Mesozoic history of bryophytes. – Fossil Imprint 79(2): 103–125.

Page of description: 107

Type

Original diagnosis/description

Leaves with an oblong basal portion narrowing above to become linear, long, narrow and parallel-sided, with a shortly narrowed to obtuse or rounded apex. Costa occupying 25–35 % of leaf width. Costa with 1–2 layers of guide cells, only abaxial stereids, or both abaxial and adaxial stereids, and an epidermis that may or may not be differentiated. Upper leaf lamina 2–4-stratose, cells papillose. Cells of basal lamina sometimes partly infl ated.

Etymology

The name is an anagram of Diphyscium D.Mohr, 1803, an extant moss genus, and is chosen to indicate strong resemblance to the gametophyte of the extant genus.