Weichselia reticulata Fontaine emend. Alvin 1971
Authors/Creators
- 1. Biogéosciences, CNRS, université de Bourgogne, 6 boulevard Gabriel, F- 21000 Dijon (France) jean. david. moreau @ gmail. com (corresponding author)
- 2. Géosciences, CNRS, Université Rennes I, Campus de Beaulieu, 263 avenue du général Leclerc, F- 35042 Rennes (France) didier. neraudeau @ univ-rennes 1. fr
Description
Weichselia reticulata (Stokes & Webb, 1824) Fontaine emend. Alvin, 1971
(Fig. 3F, G)
Weichselia reticulata Stokes & Webb, 1824: 423. – Alvin 1971: 27 [cum syn.].
MATERIAL. — Two specimens: IGR-23245_B; IGR-23247.
DESCRIPTION
The material consists of fragmented secondary pinnae (Fig. 3F, G). The largest pinna fragment (IGR-23247) is 20 mm long and 5 mm wide. The pinnae bear up to 230µm long and up to 165 µm wide alternate, entire, oblong and leathery pinnules. They are attached by a broad base to the rachis and display a rounded apex and an entire margin. The pinnules are slightly inclined forward, forming an angle of 60-70° with the rachis. Adjacent pinnules are not in contact between them, being inserted at 160-190 mm from each other. The main vein of pinnules is straight and ends before the apex. The secondary veins display anastomosing lateral venation forming a polygonal mesh.
REMARKS
The gross morphology of pinnules as well as the reticulate venation allow to ascribe these specimens to Weichselia reticulata which is a common fern in the Cretaceous floras from Europe (Blanco-Moreno et al. 2018). In Northern France, W. reticulata was previously reported from the Barremian-Aptian of the Paris Basin (Carpentier 1927, 1929; Deconinck et al. 2021). In Charente-Maritime, this fern was reported from the Cenomanian clay of the Puy-Puy Lagerstätte (Le Diouron 2005).
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Material sample ID
- IGR-23245_B , IGR-23247
- Scientific name authorship
- Fontaine emend. Alvin
- Kingdom
- Plantae
- Phylum
- Tracheophyta
- Order
- Marattiales
- Family
- Weichseliaceae
- Genus
- Weichselia
- Species
- reticulata
- Taxon rank
- species
- Taxonomic concept label
- Weichselia reticulata Alvin, 1971 sec. Moreau & Néraudeau, 2023
References
- ALVIN K. L. 1971. - Weichselia reticulata (Stokes et Webb) Fontaine from the Wealden of Belgium. Memoire de l'Institut Royal des Sciences Naturelles de Belgique 166: 1 - 33.
- BLANCO-MORENO C., GOMEZ B. & BUSCALIONI A. 2018. - Palaeobiogeographic and metric analysis of the Mesozoic fern Weichselia. Geobios 51 (6): 571 - 578. https: // doi. org / 10.1016 / j. geobios. 2018.05.001
- CARPENTIER A. 1927. - La flore wealdienne de Feron-Glageon (Nord). Memoires de la Societe Geologique du Nord 1: 1 e 151.
- CARPENTIER A. 1929. - Recherches sur les vegetaux fossiles des argiles eocretaciques du Pays de Bray. Bulletin de la Societe Geologique de France 4: 89 e 96.
- DECONINCK J. - F., BOUE D., AMEDRO F., BAUDIN F., BRUNEAU L., HURET E., LANDREIN P., MOREAU J. - D. & SANTONI A. L. 2021. - First record of early Aptian Oceanic Anoxic Event 1 a from the Paris Basin (France) - Climate signals on a terrigenous shelf. Cretaceous Research 125: 104846. https: // doi. org / 10.1016 / j. cretres. 2021.104846
- LE DIOURON T. 2005. - Les vegetaux fossiles des argiles de l'Albien terminal et du Cenomanien basal de la carriere de Puy-Puy (Tonnay- Charente, Charente-Maritime). Implications paleoenvironnementales. Diplome d'Etude Approfondies Universite de Rennes I, Rennes, 75 p. (in French).