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Paleontology > Exam 2 > Flashcards

Exam 2 Flashcards

1
Q

Phylum Brachiopoda geologic range

A

Cambrian to Recent

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2
Q

Class Inarticulata geologic range

A

Cambrian to Recent

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3
Q

Class Articulata geologic range

A

Cambrian to Recent

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4
Q

Order Orthida Geologic Range

A

Cambrian to Permian

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5
Q

Order Pentamerida geologic range

A

Cambrian to Devonian

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6
Q

Order Strophomenida geologic range

A

Ordovician to Jurassic

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7
Q

Order Spiriferida geologic range

A

Ordovician to Jurassic

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8
Q

Order Rhynchonellida geologic range

A

Ordovician to Recent

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9
Q

Order Terebratulida geologic range

A

Devonian to Recent

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10
Q

Name the terms concerning the hard parts of a brachiopod

A

calcite shell, biconvex, strophic, nonstrophic, brachial valve, pedicle valve, teeth and sockets, delthyrium, notothyrium, fold and sulcus, pedicle foramen (opening), commissure, cardinal process, umbo, median septa, hinge line, interarea, punctate or impunctate, ornamentation (growth lines, ribs, costellae)

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11
Q

What are the Lingula?

A

from the Class Inarticulata, simple shells, have no teeth and sockets, chitinophosphatic, burrowed in sediment

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12
Q

Habits and niches of brachiopods

A

sessile (attached to a substrate), filter feeders,

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13
Q

Terms for the inside or soft parts of a brachiopod

A

lophophore, brachidium, adductor and diductor muscles, pedicle, mantle, periostracum, adjustor valve, body wall, mantle cavity, nephridium

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14
Q

brachidium

A

calcareous support of the lophophore

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15
Q

lophophore

A

feather-like or circular structure bearing tentacles for filter feeding, found in both bryozoans and brachiopods

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16
Q

delthyrium

A

opening in pedicle valve of brachiopod adjacent to hinge line, allowing exit of pedicle

17
Q

notothyrium

A

opening in the brachial valve adjacent to and outside the hinge line, forming part of the opening for the pedicle

18
Q

cardinal process

A

A knob at the mid-line of brachial valve interior to which the diductor muscles attach

19
Q

deltidal plate

A

plates on either side of the pedicle opening (delthyrium) in the pedicle valve. They constrict the opening or even close it off completely

20
Q

Phylum Mollusca geologic range

A

Cambrian to recent

21
Q

Class Polyplacophora range

A

Upper Cambrian to recent

22
Q

Class Scaphopoda range

A

Ordovician to recent

23
Q

Class Gastropoda range

A

Upper Cambrian to recent

24
Q

Class Bivalvia range

A

Cambrian to recent

25
Q

Class Rostroconchia range

A

Lower Cambrian to recent

26
Q

Class Cephalopoda range

A

Upper Cambrian to recent

27
Q

Subclass Nautiloidea range

A

Upper Cambrian to recent

28
Q

Subclass Ammonoidea range

A

Devonian to Cretaceous

29
Q

Subclass Coleoida range

A

Carboniferous to recent

30
Q

Suture line patterns

A

Goniatitic, ceratitic and ammonitic

31
Q

Phylum Bryozoa range

A

Ordovician to recent

32
Q

Important mollusca features

A

bilateral symmetry, coelomate, visceral mass, ventral foot (or tentacles in cephalopods), shell of calcium carbonate, head (except bivalves) with radula (ribbon with teeth) and mantle

33
Q

bivalve features

A

two siphons, most burrow, complete digestive system, only have adductor muscles, pallial line, palatial sinus (burrowing only), dentition

34
Q

cone-like bivalves

A

Cretaceous rudistids: Gryphaea and Exogyra

35
Q

Ways to determine the anterior of a bivalve

A
  1. ligamental nymphs - when present, are posterior to beaks 2. pallial sinus is always posterior 3. If only one adductor muscle scar, it is posterior. If two but one is significantly larger, it is posterior. 4. If beaks lie near one end of shell, the shorter end is usually anterior. 5. If one end tapers to a narrow rostrum, it is posterior.
36
Q

gastropod features

A

coiled shell, aperture, whorls, inner lip and outer lip of aperture, suture, visceral foot, siphons, siphonal canal, whorl shelf

37
Q

cephalopod features

A

totally marine, fastest and most complex of the mollusca, tentacles, eyes

38
Q

nautiloid features

A

aragonite shell,

Paleontology (2 decks)

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