Rhynchosauroides Maidwell, 1911

JUNIOR SYNONYM(S): N/A

DESCRIPTION: Broad quadrupedal trackways. Manus mostly postioned medially to the pes or being overstepped by the latter at normal gait, in some cases positioned anteriorly to the pes. Depending on the velocity of movement, the pace angulation of the pes varies between 70 degrees and 130 degrees. The pes is slender and digitigrade, the smaller manus much more stout and plantigrade. Digits of the pes and manus increase in length from I to IV, digit IV is always longest, digit V is much shorter. Divarication angle between pedal digits II-IV relatively high (= 20 degrees). Digits I-IV can be curved inward. Digit group II-IV without distinct posterior margin. Drag marks of the tail occasionally present.

BEHAVIOR(S): Repichnia

ENVIRONMENTAL SETTINGS: Continental; terrestrial

POSSIBLE TRACEMAKERS: Basal archosauromorphs and lepidosauromorphs

GEOLOGIC RANGE: Upper Permian-Lower Triassic

ADDITIONAL REFERENCES: Emended by Klein and Niedzwiedzki, 2012. Maidwell, 1914; Ptaszynski, 2000; Valentini et al., 2007; da Silva et al., 2012

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