Tuboid graptolites from erratic boulders of Poland

by Piotr Mierzejewski

Acta Palaeontologica Polonica 1978, 23, 4, 557-575
PORTAL OF GRAPTOLITES AND PTEROBRANCHS
Abstract. Cyclograptidae (=Idiotubidae)
are described from the Ordovician to
Silurian erratic boulders of Poland. Some
problems involved in tuboid taxonomy and
colony organization are considered. One
new genus (
Kozlowskitubus gen.n.) and
three new species (
Epigraptus eisenacki
sp.n.,
E. kozlowskii sp.n., Dendrotubus
bulmani
sp.n.) are erected. Names
Idiotubus Kozłowski, 1949 and
Idiotubidae Kozłowski, 1949, were
recognized for junior synonyms of
Epigraptus Eisenack, 1941, and
Cyclograptidae Bulman, 1938,
respectively.
Dendrotubus sp. Upper Ludlovian.
Fragment of colony with partially preserved
two isolated autothecae and a thecal group.