Living and Fossil Brachiopods |
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Page 86
... spines V.V. anchorage spines 1cm Fig . 41. Complex spines on a Permian strophomenide ( Chonosteges ; Strophalosiacea ) : note early attachment by cementation , later supplemented by tubular anchorage spines ( based on photographs in 6o ) ...
... spines V.V. anchorage spines 1cm Fig . 41. Complex spines on a Permian strophomenide ( Chonosteges ; Strophalosiacea ) : note early attachment by cementation , later supplemented by tubular anchorage spines ( based on photographs in 6o ) ...
Page 93
... tubular spines.6 60 Early in ontogeny , spines grew from the ventral valve on either side of the tiny pedicle and clasped the shell to some piece of sub- stratal material ( Fig . 40B , C ) . This effectively prolonged the attached stage ...
... tubular spines.6 60 Early in ontogeny , spines grew from the ventral valve on either side of the tiny pedicle and clasped the shell to some piece of sub- stratal material ( Fig . 40B , C ) . This effectively prolonged the attached stage ...
Page 115
M. J. S. Rudwick. intercalating costellae ' branching ' costellae grille of internal spines tubular external spines ( ? some sensory ) commissure lost , mantle exposed S Z Z Z Z Z Z Z 2 -tubular spines Fig . 63. Chart to show possible ...
M. J. S. Rudwick. intercalating costellae ' branching ' costellae grille of internal spines tubular external spines ( ? some sensory ) commissure lost , mantle exposed S Z Z Z Z Z Z Z 2 -tubular spines Fig . 63. Chart to show possible ...
Common terms and phrases
aberrant abundant adductors apertures atrypides attached bivalve bivalve molluscs body wall brachial axes brachidia brachidium burrow calcareous calcite Cambrian Carboniferous cementation chitinophosphatic cilia coelom commissure concavo-convex convex costellae Cretaceous crura deltidium Devonian period diductors dorsal valve early evolution evolved exhalant external fauna feeding mechanisms fibres filaments foramen fossil brachiopods function gape genera grooves growth stages growth-lines hinge axis hinge line hydrostatic skeleton impunctate inarticulates inhalant interarea lamellae larval later Lingula lingulides living articulates living brachiopods living rhynchonellide living species living terebratulide lobes loop lophophore mantle cavity mantle tissue molluscs morphology muscle platforms Notosaria ontogeny orthides pair palaeontologists Palaeozoic particles pedicle PENTAMERIDA pentamerides periostracum Permian phylum plectolophe posterior probably protective ptycholophes quasi-infaunal reconstruction resorption rhynchonellides schizolophe secondary layer sediment sensitive mantle edges setae shell Silurian socket spiral spiralia spiriferides spirolophe strata strophomenides structure substrate transapical Triassic tubular spines valve edges valve surfaces ventral valve zig-zag zygolophe