-   Cambrian   -   Ordovician   -   THE WORLD OF ORGANIC MICROFOSSILS    -   Silurian   -   Devonian   -
Class: Scyphozoa, Subclass: Scyphomedusae, Order: ?Coronata, Incertae familiae
Genus Byronia Matthew, 1899
Type species: Byronia annulata Matthew, 1899
Diagnosis of the genus Byronia Matthew
by Mierzejewski (1986, p. 145):

----"Scyphothecae long, circular to suboval in cross-section,
gradually widening in distal direction. Scyphorhiza in the
form of basal disc; colonial forms also with stolons. Periderm
organic, sculptured with transversal rings, longitudinal
striated or smooth. Solitary and encrusting forms."
According to Mierzejewski (1986), the generic name Byronia
Matthew should be treated as a name for informal collective
group for all the fossil solitary species of scyphoplyps as well
as those forming encrusting colonies. Similarly, in zoological
practice, the name
Stephanoscyphus is used for both colonial
and individual forms. Naumov (1961) was of the opinion that
the species at present described under the name
Stephanoscyphus will undoubtedly be allocated to a few
separate families in the future. Mierzejewski supposed that
each of the species of
Byronia there is no way of verifying
that assump
tion. In turn, dendroidal forms such as dithecoid
graptolites (Dithecoidea)  should be allocated in the genus
Archaeolafoea  Chapman, and also treated as a informal
collective group.

----Species assigned. - Byronia annulata Matthew, 1899, B.
naumovi Kozłowski, 1967 and B. robusta (Kozłowski, 1967).
----See also related pages:
Byronia robusta (Kozłowski) Mierzejewski
Dithecoidea - a taxonomic wastebasket.
Byronia annulata Matthew, 1889
Holotype, Upper Cambrian, Mount Stephen (British Columbia).


Kozłowski, R. 1967. Sur certains fossiles a test organique. -
Acta Palaeontologica Polonica 12, 2, 99-137.
Matthew, G. F. 1899. Upper Cambrian of Mount Stephen, British Columbia: the
Trilobites and Worms. - Roy. Soc. Canada, Trans.,
Ser. 2, 5, 4, 39-56, Ottawa.
Mierzejewska, G. & Mierzejewski, P. 1979. Chitin-protein complex in the Ordovician organic microfossil. -
Acta Medica Polona 20,
-----1, 33-34.
Mierzejewski, P. 1986.
Ultrastructure, taxonomy and affinities of some Ordovician and Silurian organic microfossils. - Palaeontologia
------Polonica 47, 129-220.
Naumov, D. V. 1961. Определители по фауне СССР

edited since 2002 by
Piotr Mierzejewski, the Count of Calmont