Ilfeldia gregoriensis Pšenička, P.Correia, Šimůnek, A.A.Sá, J.B.Murphy et D.Flores

Plant Fossil Names Registry Number: PFN000323

Act LSID: urn:lsid:plantfossilnames.org:act:323

Authors: J. Pšenička, P. Correia, Z. Šimůnek, A. A. Sá, J. B. Murphy & D. Flores

Rank: species

Reference: Pšenička, J., Correia, P., Šimůnek, Z., Sá, A. A., Murphy, J. B. & Flores, D. (2017): Revision of Ilfeldia and establishment of Ovulepteris gen. nov. from the Pennsylvanian of Europe, with a discussion on their concepts. – Review of Palaeobotany and Palynology 236: 59–73.

Page of description: 61

Illustrations or figures: pl. II, fig. 1, pl. III. figs 1–8

Types

Original diagnosis/description

Fertile and sterile leaves of taeniopterid type, about 35 mm long and 6–11 mm wide, oblong or spatulate; leafmargins entire and essentially parallel; fertile leaves very slightly tapered towards the apex and base from the middle part of leaf; leaf lamina not reduced; sterile leaves have obtusely rounded apex and taper gradually towards the base starting at about 2/3 the leaf length; midrib 0.8 mm broad, slightly longitudinally striated, extending to apex; lateral veins of sterile and fertile leaves thin, arise at an acute angle, once (rarely twice) dichotomized near the midrib, and arch to reach lateral margin at about 80°; venation density 12 veins per 10 mm on lateral margin; each vein in fertile leaves terminated by synangiumthat extends beyond leafmargin; synangiumcomposed of two (rarely three) sporangia, fused in lowermost part, 0.6–0.7 mm long and 0.5 mm wide, reniform, tapering to distal end, attached to short pedicel that is attached to end of vein.

Etymology

Ilfeldia gregoriensis is named in honour of the paleontologist Dr. Mena Schemm-Gregory (Geosciences Center of the University of Coimbra, Portugal), a world expert on fossil brachiopods, who tragically died in 2013 at age 36.

Stratigraphy

Carboniferous, Pennsylvanian
Laminated graymudstone; UTS D1 of Pinto de Jesus (2001, p. 148); Gzhelian (lower Stephanian C), Upper Pennsylvanian

Locality

Portugal
Outcrop located in the São Pedro da Cova region, Douro Carboniferous Basin; coordinates (WGS84): 41°09′44.60″N, 08°30′23.10″W