Species

Oldhamia flabellata Aceñolaza et Durand, 1973

Taxon description

Seilacher et al., 2005

Emended Diagnosis: Oldhamiawith irregular, sinu-ous, occasionally discontinuous probings closelypacked to form a leaf-line structure. Probingswere made in a centrifugal succession to both side.

Lindholm & Casey, 1990

Description.Irregularly shaped clusters of dendritic burrows; no well- defined point of convergence. In some specimens there is an obvious elongate central burrow from which other burrows project with irregular trajectory (Fig. 8A). Burrows project from both sides of central burrow but in some forms one side appears favored. Central burrow often undulatory and com- monly becomes obscure as it terminates in cluster of burrows. Spacing of burrows is irregular and tends to be either loosely or tightly spaced. Length of a cluster from 0.5 to 3 cm. Individual burrows connect either to central burrow or to another burrow within a cluster, resulting in branching. Commonly, the burrows appear to be discontinuous. Length of the burrows from 2 to 10 mm. Burrows straight to slightly crooked, irregularly spaced, and characterized by blunt terminations.

Synonymy list
1859     Oldhamia antiqua — Kinahan , fig. Fig. 4, 9
1973     Oldhamia flabellata — Aceñolaza & Durand , pp. 49, fig. Pl. 1:C,D,F
1981     Oldhamia radiata — Hofmann & Cecile , pp. 282, fig. Fig. 40.3 F
1984     Oldhamia flabellata Aceñolaza et Durand, 1973 — Aceñolaza & Durand , fig. figs. 2B, 2C 2F-2H.
1990     Oldhamia flabellata Aceñolaza et Durand, 1973 — Lindholm & Casey , pp. 1275, fig. Figs. 8A-8C
2005     Oldhamia flabellata Aceñolaza et Durand, 1973 — Seilacher et al. , pp. 344, fig. Fig. 12C, 17
Classification
Organism groupBiota
Ichnofossil groupIchnofossils
Bioturbation trace fossils
GenusOldhamia
Speciesalata
antiqua
curvata
flabellata
geniculata
radiata
recta
smithi