NOTE ADDED IN PROOF
A fragment from a leaf-bearing rock from site 1 has revealed two
fossil fruit specimens (Fig. 15.1-15.4).
Also, a new cuticle morphotype was found from site 2, due to improved
fluorescence equipment (Fig. 15.5-15.6).
These specimens were discovered after manuscript acceptance. The fruits are
preserved as compression-impressions with some three-dimensionality. These
occurrences include the
following three specimens. All scale bars in
Figure 15 equal 0.2 mm; all photographs
were taken on the Nikon SMZ-1500 stereomicroscope.
USNM 536213 (Fig.
15.1, 15.2, part and counterpart). Icacinaceae cf. Palaeophytocrene (Reid,
E.M., and Chandler, M.E.J. 1933. The London Clay Flora. British Museum
[Natural History], London, England, 561 p.). Oval, tuberculate endocarp.
Tubercules extend towards center of fruit, tubercles in vertical rows.
Dimensions preserved: 2.7 mm length, 1.2 mm width.
USNM 536214 (Fig.
15.3, 15.4, part and counterpart). Juglandaceae sp., endocarp. The single
specimen is ovoid and basally lobed internally. The endocarp is apparently
without a wing and two-lobed, but more specimens would be needed to determine
these characters and better assign this fruit taxonomically. Dimensions
preserved: 1.3 mm length, 0.8 mm width.
USNM 536215 (Fig.
15.6; Fig. 15.5 shows a separated fragment of the same morphotype, on the
same rock). Dicot cuticle morphotype with densely spaced, diffuse paracytic
stomata and trichome bases, visible under fluorescence microscopy with long-pass
green filter. Spherical resin bodies are also visible in the carbon film between
cuticle layers (Fig. 15.5), and these
are probably organically preserved oil/mucilage idioblasts common in tissues of
Laurales, Magnoliales and basal ‘ANITA’ grade angiosperms. These resin bodies
are also visible, under fluorescence, in the Lauraceae leaf morphotype exemplar
(Fig. 2.3), further confirming that
specimen as Lauraceae.