Figure 1 - ? Fusiferella armata (rk1150)
Flat discoid specimen. Höver, senonensis Zone
Figure 2 - ? Fusiferella armata (rk1149)
Flat discoid specimen, cut and etched. Höver, papillosa Zone
Figure 3 - ? Fusiferella armata (rk1149)
Close-up of etched specimen. Part with more or less randomly oriented oxeas.
Höver, papillosa Zone
Figure 4 - ? Fusiferella armata (rk1149)
Close-up of etched specimen. Subparallel, densely spaced megascleres (oxeas, 2 protriaenes).
Höver, papillosa Zone
Figure 5 - ? Fusiferella armata (rk1149)
Isolated megascleres: Long-shafted protriaenes, curved oxeas.
Höver, papillosa Zone
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Synonyms:
Fusiferella armata De Laubenfels 1955
Atractophora armata (Schrammen 1924)
Occurence:
Höver, Lower Campanian (senonensis and papillosa Zones). Very rare.
Misburg, Upper Campanian. Very rare.
Schrammen (1924) described "Atractophora armata"
as a new species, on the basis of a single specimen from Misburg. De Laubenfels (1955) renamed the species into
Fusiferella armata, presumably because the genus name given by Schrammen was preoccupied for an algae species.
Fusiferella armata is a rare (type specimen, only) and poorly known species. Schrammen (1924, p. 76)
states that he could not identify any megascleres other than straight or curved oxeas of varying
length and thickness, and in particular that tetraxons could not be found, despite considerable effort.
Two new specimens in the author's collection (Figs. 1 and 2) appear similar to Fusiferella armata.
Both specimens consist of discoid to plate-like lumps of approximately 100 mm diameter and 30 to 40 mm thickness. Examination
of a large number (several thousand) of isolated spicules provided evidence for the presence of very scarce protriaenes (less than
one per cent of all spicules). The vast majority of the spicules are curved, slender oxeas, covering a considerable size range
from less than 1 mm to more than 5 mm long. However, it is noted that the oxeas of the new specimens appear more slender than
those documented by Schrammen (1924, Plate IX, Fig. 11).
The skeleton structure is complex, but has a general radial structure, due to closely arranged sub-parallel
oxeas in its central part (Figures 2 and 4). Additionally, there are peripheral, arched, rarefied regions with more randomly
arranged spicules. (Figures 2 and 3).
Figure 5 shows a selection of isolated megascleres.
The (very scarce) triaenes are simple, slender, long-shafted protriaenes.
The abundant megasclere oxeas are fusiform and generally slightly curved.
The author suspects that his two new specimens and Schrammen's Fusiferella armata may belong to the same
taxonomic species. The low abundance of protriaenes could explain why Schrammen (1924) was unable to prove their presence in
Fusiferella armata. The apparently more slender shapes of the oxeas presented here may be due to better presevation, while
Schrammen's (1924, Plate IX, Fig. 11) examples show blunt (damaged ?) ends.
In conclusion, the author has transferred Fusiferella armata
from "Order: Uncertain" into Order: Craniellida Reid, 1968 and
Family: Tetillidae Sollas, 1886.
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