|Rhabdopleura kozlowskii Kulicki, 1969
|Remarks. - Remains of Rh. kozlowskii were separated by etching from a calcareous concretion, about 30 kg in general
weight, found in black Callovian clays in a clay pit Lapiguz in Lukow about 100 km south-east of Warsaw, Poland.
Named in honour of Professor Roman KozĹ‚owski, a famous investigator of fossil hemichordates.
This species, according to some researchers, is the oldest known representative of the genus Rhabdopleura
|SEM micrographs of Rhabdopleura kozlowskii from Callovian
(Jurassic), Lapiguz clay pit, Lukow (Poland). A. Fragment of a
zooidal tube. B. Fissure in the periderm; arrow indicates a
presumably bunch of cortical fibrils. C. Unconformity between
two presumably bunches of cortical fibrils on the surface of a
sterile bud cyst. Note a striking similarity to cortical bandages in
graptolites! From Mierzejewski & Kulicki, 2001.
Diagrams of the different stolons
and diaphragms observed.
From Kulicki, 1969.
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