Ichnostratigraphy - Trace Fossils as Indicators of Sedimentary Environments - page 194

TABLE 1 Summary of Tetrapod-Footprint Stratigraphy ( Based on

Lucas, 2007 )—Cont'd

Period/epoch Diagnostic characteristics Representative ichnotaxa

Late Permian - Trackways produced by

pareiasaurs and dicynodonts

Pachypes, Dicynodontipus,
and Rhynchosauroides

- Rhychosauroides biochron

Early Permian - Trackways produced by

temnospondyls,
“diadectomorphs”,
seymouriamorphs,
procolophonids, and basal
synapsids (pelycosaurs)
- Continuation of the Dromopus
biochron

Batrachichnus, Limnopus,
Amphisauropus, Dromopus,
Varanopus, Hyloidichnus,
Ichniotherium, Dimetropus,
and Gilmoreichnius

Late
Pennsylvanian

- Beginning of the Dromopus

biochron

Batrachichnus, Ichniotherium,
Dromopus, Gilmoreichnus,
and Dimetropus

Early-Middle
Pennsylvanian

- Dominance of stem amniote
(captorhinomorphs)
trackways

Pseudobradypus, Limnopus,
Paleosauropus, Cursipes, and
Asperipes

- Temnospondyl footprints

present also

- Pseudobradypus biochron

Mississippian - Trackways produced by

temnospondyls and stem
amniotes (captorhinomorphs)

Peratodactylopus, Megapezia,
Baropezia, Hylopus, and
Paleosauropus

Late Devonian - Trackways attributed to

ichthyostegalians

None

3. MARGINAL-MARINE ENVIRONMENTS
Marginal-marine brackish-water ichnofaunas display evolutionary changes
through the Phanerozoic, providing a macroevolutionary signature ( Buatois
et al., 2005 ). However, their potential in high-resolution biostratigraphy
seems to be limited. A few ichnotaxa characteristic of marginal-marine
deposits may display stratigraphically restricted distributions. For ex-
ample, Climactichnites ( Fig. 2 A) and its associated resting trace Musculopo-
dus are only known from the Upper Cambrian (Furongian) ( Getty and