1998 Aninopteris formosa GIVULESCU and
POPA, p. 51-66, Pls. 1, 2, Text-figs. 1-6.
1999 Aninopteris formosa POPA and VAN KONIJNENBURG-VAN
CITTERT, p. 182-183, Pl. 2, Figs. 1-3, 5.
Rachis of pinnae stout, 1,5 – 8 mm wide, unornamented or finely
longitudinally striated, pinnules long, 70 - 100 mm or over, lanceolate,
generally perpendicular, alternating or suboppositely inserted;
pinnule base roundly constricted, pinnules with entire margins,
parallel, abaxially prominent venation, adaxially depressed when
compared with the upper surface of lamina, midrib straight, secondary
veins generally perpendicular to the midrib, dichotomously and almost
symmetrically divided, interconnected in a narrow marginal portion
of the lamina, sori placed on the lower surface in two rows along
the midrib, 0.7 – 0.9 mm diameter, in the second quarter or
half of the pinnules length and in the first half of the distance
between the midrib and margin, lacking an indusium and very reduced
receptaculum, with 6-8 sporangia with uniseriate annulus showing
large 16-20 cells, 0.2 - 0.3 mm in diameter; spores rounded, around
40 microns in polar diameter, triangular in polar view, nonvalved,
with psilate exine, trilete mark with long and narrow laesurae which
almost reach the equatorial margin, interradial thicknenings well
marked; no perispore present (in Givulescu and Popa, 1998).
The closest taxon to the genus Aninopteris is Phlebopteris.
The main difference from all Phlebopteris species is the
large size of the pinnules and their slight auricular basis. The
constriction of the pinnules base doesn’t occur in any species
of the Phlebopteris genus, making of this the main character
for defining a new genus named Aninopteris.
Anina, former Steierdorf, Caras-Severin County, Resita
Sinemurian in age.
Compressive, very well preserved, with in situ spores.
Givulescu, R. and Popa, M.E., 1998. Aninopteris formosa
Givulescu et Popa, gen. et sp. nov., a new Liassic matoniaceous
genus and species from Anina, Banat, Romania. Review of Palaeobotany
and Palynology, 104: 51-66.
Popa, M.E. and Van Konijnenburg - Van Cittert,
J.H.A., 1999. Aspects of Romanian Early Jurassic palaeobotany and
palynology. Part I. In situ spores from the Getic Nappe, Banat,
Romania, 5th EPPC. Acta Palaeobotanica. W. Szafer Institute of Botany,
Krakow, pp. 181-195.