SCIENTIFIC PORTAL FOR ALL USERS INTERESTED IN PTEROBRANCHS AND GRAPTOLITES
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SOME NEW MATERIAL OF ORDOVICIAN MEDUSAEGRAPTUS
Lin Yao-kun
Acta Palaeontologica Sinica 1984, 23, 4, 472-480
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"The graptolite specimens described in the present paper were collected from the upper part of the Longmendong Formation
(Middle Ordovician) at Longlian and the middle part of the Taoqupo Formation (Middle and Upper Ordovician). at Yaoxian,
Shaanxi. Among them, 6 new species of Medusaegraptus namely . M. hispidus, M. setaceus, M. pavonicus, M. floralis, M.
divaricatus and M.? plumosus were found in association with Orthograptus longithecalis Mu et Zhang, O. pauperatus
Lapworth, O. calcaratus Lapworth, Diplograptus cf. vespertinus Ruedemann and Dicellograptus forchammeni Geinitz etc.,
forming an assemblage which belongs to the Climacograptus geniculatus zone or Orthograptus longithecalis zone of late
Middle Ordovician and probably corresponds to the Climacograptus geniculatus zone of Eastern Chilianshan in China and to
the Dicranograptus clingani zone of Britain."
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See also related pages:
Medusaegraptus sp. from the Silurian of Gotland, Sweden
Dithecoid graptolites - a taxonomic wastebasket
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