View
222
Download
4
Category
Tags:
Preview:
Citation preview
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Tabulata (Tabulate Corals)
Ranged from Ordovician to Permian
Major reef formers, Silurian and Devonian reefs
Always colonial
Tabulae, no septa
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Tabulata (Tabulate Corals)
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Tabulata (Tabulate Corals)
Favosites
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Tabulata (Tabulate Corals)
Halysites
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Bryozoa (Moss animals)
Ranged from Ordovician to Recent
Major reef formers, Silurian and Devonian reefs
Colonial
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Bryozoa (Moss animals)
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Bryozoa (Moss animals)
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Bryozoa (Moss animals)
Bryozoa
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Bryozoa (Moss animals)
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Brachiopoda (Lamp shells)
Adundant, diverse and useful
Cambrian to Recentmost abundant in the Paleozoic
Inarticulatesmost abundant in Cambrian to Silurian
Articulatesmost abundant in Ordovician to Permian
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Brachiopods (Lamp shells)
Lophophore
Pedical Valve
Brachial Valve
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Brachiopods Symmetry
Pedical Valve
Brachial Valve
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Articulate Brachiopods
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Articulate Brachiopods
Hinge at posterior of valves
Teeth and sockets
May have a pedicle
Shells are usually CaCO3 or can be phosphatic
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Articulate Brachiopods
Strophomenids, orthids, pentamerids andrhynconellids most common in early Paleozoic
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Inarticulate Brachiopods
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Inarticulate Brachiopods
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Inarticulate Brachiopods
Muscles hold valves together
Long pedicle
Shells are usually phosphatic
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Mollusca
Basic mollusc body plan changed over time to produce today's main classes of molluscs. Mantle tissue produces shell which protects visceral organs. Posterior mantle cavity houses gills which obtain oxygen from water passing into cavity. Head contains tentacles, eyes, brain, and radula (rasping "tongue") Viscera houses internal organs: heart, guts, kidney, gonads Foot is muscular, for movement
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Mollusca
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Mollusca
BivalvesShell elaborates into 2 "valves" with connecting ligament Head and radula disappear:
Sensory role of head taken over by mantle (eyes, tentacles
develop there) Feeding role of radula taken over by enlarged gills, leading to "filter feeding" Early Cambrian to Holocene
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Mollusca
CephalopodsShell reduced or lost Rapid movement permits predation: •complex eye•complex brain, nervous system•advanced circulation (3 hearts)
Late Cambrian to Recent
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Mollusca Cephalopods
EARLY PALEOZOIC LIFEMetazoan Invertebrates
Mollusca
Cephalopods
ChamberedNautilus
Recommended