Geoscience Reference
In-Depth Information
Fig. 2. Specimen n8 DAA 123. Rellimia sp. (a) Gross view of the specimen; fertile organs are labelled A to C;
scale bar: 1 cm. (b) One fertile organ (after transfer); note the elongate slender sporangia; one single sporangium is
indicated by the arrow; scale bar: 1 mm. (c) Fertile organ A of Figure 2a, enlarged; A1 and A2 are the two halves of the
fertile organ; the two first order axes (arrows) are visible; scale bar: 5 mm.
an axis that branches once proximally into two
first-order axes. Such a dichotomy is observed in
the face view for the most proximal fertile organ
(Fig. 2a, A; Fig. 2c, A1 & A2). Each first-order
axis bears second- and third-order axes in a pinnate
(i.e.
schematic reconstruction of a fertile organ is
proposed in Fig. 3). Masses of sporangia (Fig. 2b)
are borne on the ultimate divisions. Sporangia are
elongate and slender and possess an acute apex
(Fig. 2b, arrow). They are up to 6.0 mm long and
0.3 - 0.4 mm
lateral)
alternate
arrangement
(Fig.
2b;
a
wide.
The
specimen
is
poorly
