Bryozoans |
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Page 123
... cryptostomes makes this seem rather improbable , as it would demand the presence of a very long introvert ( tentacle sheath ) and a remarkably efficient hydrostatic protrusion mechanism . It is perhaps more likely that the hemiseptum ...
... cryptostomes makes this seem rather improbable , as it would demand the presence of a very long introvert ( tentacle sheath ) and a remarkably efficient hydrostatic protrusion mechanism . It is perhaps more likely that the hemiseptum ...
Page 130
... cryptostomes presents a distinct contrast . They , too , evolved rapidly during the Ordovician , without quite matching the early success of the trepostomes . Thereafter , the cryptostomes continued to flourish for millions of years and ...
... cryptostomes presents a distinct contrast . They , too , evolved rapidly during the Ordovician , without quite matching the early success of the trepostomes . Thereafter , the cryptostomes continued to flourish for millions of years and ...
Page 131
... cryptostomes fell sharply during the Silurian . This period was , therefore , either one of little evolutionary change or just manifestly understudied , or perhaps both . For trepostomes both rates apparently recovered somewhat during ...
... cryptostomes fell sharply during the Silurian . This period was , therefore , either one of little evolutionary change or just manifestly understudied , or perhaps both . For trepostomes both rates apparently recovered somewhat during ...
Contents
Figures | 7 |
GymnolaemataSuccess in the sea | 29 |
PhysiologyFunction in zooid and colony | 43 |
Copyright | |
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Alcyonidium algae anascan ancestrula appears arise Ascophora ascus astogeny atrium autozooids avicularium basal lamina body wall Bowerbankia brood chamber bryozoans Bugula calcification Callopora cells Ceramoporoidea Cheilostomata cheilostomes cilia coelocystic coelom colony form Cretaceous cribrimorphs Crisia cryptocyst Cryptostomata cryptostomes Ctenostomata ctenostomes cuticle Cyclostomata cyclostomes cystid Cystoporata cystopores deposition diaphragms distal Electra embryo entoprocts epidermis epithelium fenestelloid Flustra Flustrellidra fossil Fredericella frond frontal membrane frontal wall funiculus genera genus growing edge growth Gymnocystidea Gymnolaemata gymnolaemates heterozooids hypostegal coelom incrusting interzooidal invagination kenozooids larvae layer Lichenopora longitudinal lophophore lumen mandible margin Membranipora occur ooecium operculum Ordovician orifice Palaeozoic parietal muscles peritoneum pharynx Phylactolaemata phylactolaemates Plumatella polypide pore-plate pores primary zooid proximal pseudopores retractor muscle rudiment septa septum shells species spines statoblasts Stenolaemata stenolaemates stolons structure Suborder substratum Superfamily supraneural surface tentacle sheath transverse parietal Transverse section Trepostomata trepostomes tubular zone Zoobotryon zooecia zooid zooid wall zooidal