133845.pdf
(^34) DAVID A. T. HARPER & CONALL MAC NIOCAILL OWEN, A. W., HARPER, D. A. T. & ROMANO, M. 1992. The Ordovician biogeogra ...
Diversification and biogeography of bivalves during the Ordovician Period JOHN C. W. COPE Department of Earth Sciences, Cardiff ...
36 JOHN C. W. COPE Altogether some nine or ten species are known so far from Tremadoc rocks. From the lower part of the Arenig S ...
ORDOVICIAN BIVALVE BIOGEOGRAPHY 37 Fig. 2. Continental reconstructions for the Ordovician. (a) Early Ordovician. Note near-polar ...
(^38) JOHN C. W. COPE Similodonta Soot-Ryen, 1964, is a character- istic praenuculid genus of the Late Ordovician of Laurentia a ...
ORDOVICIAN BIVALVE BIOGEOGRAPHY 39 nuculoids that have a posteriorly elongate shell and the family Malletiidae includes all the ...
40 JOHN C. W. COPE the Amadeus Basin, Australia, by Pojeta & Gilbert-Tomlinson (1977). The same genus occurs in the Llanvirn ...
ORDOVICIAN BIVALVE BIOGEOGRAPHY 41 were included in the Palaeoheterodonta by Cox etal (1969). The actinodontid heteroconchs incl ...
42 JOHN C. W. COPE heteroconch genus to display a multiplicity of muscle scars. Such features are common in other genera of hete ...
ORDOVICIAN BIVALVE BIOGEOGRAPHY 43 they show affinities to both groups and it could be that their placement is correct within th ...
(^44) JOHN C. W. COPE superfamily Modiolopsoidea Fischer, 1887, for- merly often classified with the heteroconchs, but shown by ...
ORDOVICIAN BIVALVE BIOGEOGRAPHY 45 and Siberia; Cuneamya is also recorded from Kazakhstania (Khalfin 1958). Cuneamya appears ear ...
46 JOHN C. W. COPE Fig. 3. Pie diagrams to illustrate the faunal composition and diversity of bivalve faunas in the Ordovician. ...
ORDOVICIAN BIVALVE BIOGEOGRAPHY 47 Fig. 4. Pie diagrams to illustrate abundance of bivalve individuals composing the faunas of w ...
48 JOHN C. W. COPE anomalodesmatans, which are primarily (but not exclusively) infaunal, were also more diverse at low latitudes ...
ORDOVICIAN BIVALVE BIOGEOGRAPHY 49 paleogeographique de leur inventaire. Geologie Mediterraneenne, 17, 243-261. BABIN, C. & ...
50 JOHN C. W. COPE HARRISON, W. B. & HARRISON, L. K. 1975. A Maquoketa-like molluscan community in the Brassfield Formation ...
ORDOVICIAN BIVALVE BIOGEOGRAPHY 51 POJETA, J, 1962. The pelecypod genus Byssonychia as it occurs in the Cincinnatian at Cincinna ...
52 JOHN C. W. COPE SOOT-RYEN, H. & SOOT-RYEN, T. 1960. The Middle Ordovician of the Oslo Region, Norway. 11, Pele- cypoda. N ...
Phytogeny of the Reedocalymeninae (Trilobita): implications for Early Ordovician biogeography of Gondwana SAMUEL T. TURVEY Depar ...
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