Dictyophyllum menendezii Bodnar, J.M.Drovandi, E.M.Morel et Ganuza

Plant Fossil Names Registry Number: PFN000515

Act LSID: urn:lsid:plantfossilnames.org:act:515

Authors: J. Bodnar, J. M. Drovandi, E. M. Morel & D. G. Ganuza

Rank: species

Reference: Bodnar, J., Drovandi, J. M., Morel, E. M. & Ganuza, D. G. (2018): Middle Triassic dipterid ferns from west-central Argentina and their relationship to palaeoclimatic changes. – Acta Palaeontologica Polonica 63(2): 397–416.

Page of description: 401

Illustrations or figures: figs 4, 5

Types

Holotype PBSJ 832, Instituto y Museo de Ciencias Naturales de San Juan (Palaeobotanical Collection), San Juan, Argentina
Figures: fig. 4A

Note: Paratypes: PBSJ 833 (fig. 4B), PBSJ 836 (fig. 4D), PBSJ 840 (fig. 4C), PBSJ 843 (fig. 4E), all housed in the same repository as the holotype.

Original diagnosis/description

Petiolate fronds bilaterally symmetrical and fan-shaped. Rachis dividing into two opposite arms, each arm bearing 5 or 6 oblanceolate pinnae. The lowest part of the lamina of adjacent pinnae is fused, forming a wide web. Margin of the pinnae entire to undulate. Primary veins catadromous to isodromous, striate and straight. Secondary veins subopposite, smooth and falcate to sinuous. Tertiary veins subopposite to alternate, falcate or with a zig-zag pattern, dichotomizing four times to form a fine reticulate mesh of polygonal irregular areoles.

Etymology

In honour to Carlos Alberto Menéndez (1921–1976), Argentinean palaeobotanist, for his important studies on Mesozoic floras of Argentina.

Stratigraphy

Triassic, Middle Triassic
fossiliferous stratum 4, lower member of Cortaderita Formation, Sorocayense Group, early Ladinian

Locality

Argentina
Cortaderita Creek, Barreal-Calingasta Depocenter, San Juan Province

Plant fossil remain

macro- and meso-fossils-embryophytes except wood

Comments

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