Tripartichnus VALLON & RÖPER, 2006
Tripartichnus triassicus VALLON & RÖPER, 2006
Bilaterally symmetrical depressions on bedding planes showing a division along the longitudinal axis into three parts: front, middle and rear, being broad, medium and narrow in width respectively (VALLON & RÖPER, 2006: p. 157).
Derivation of name:
From Latin tres = three and pars = part; after the morphological division of the trace fossils into three parts.
Resting traces of arthropods that may occur in a variety of environmental settings. T. triassicus derives from fluvial deposits, perhaps with an occasional slightly brackish influence. T. imbergi occurs in the lagoons of the lithographic limestones around Solnhofen, especially in the localities of Pfalzpaint that are interpreted as tidal canals connecting several lagoonal basins with each other (VALLON & RÖPER, 2006) and therefore fully marine.
Known Stratigraphic Range:
Lower Triassic – Upper Jurassic (VALLON & RÖPER, 2006)
Detailed information for each ichnospecies
- Tripartichnus triassicus VALLON & RÖPER, 2006
- Diagnosis: Tripartichnus in which the front and the middle parts are divided longitudinally; elongated and lanceolate at its rear (VALLON & RÖPER, 2006: p. 157).
- Orientation: Preserved as negative epichnion or positive hypichnion.
- Morphological category (Knaust, 2012): Imprint.
- Ethological category: Cubichnia.
- Environment: Fluvial, perhaps slightly brackish in times.
- Derivation of name: After the Triassic system.
- Types: Staatliches Museum für Naturkunde Stuttgart, Germany; Holotype Inventary-No.: SMNS 64849/1; Paratypes Inventary-No.: SMNS 64849/2 to SMNS 64849/11.
- Type locality: Former building site in Keltern-Dietlingen, Germany (address: Felix-Wankel-Straße 6, D-75210 Keltern-Dietlingen; GPS: 48°53'26"N 8°37'03"E).
- Type horizon: Lower Triassic, Upper Buntsandstein, Plattensandstein, Röt-Folge.
- Geographical distribution: Only known from the type locality.
- Remarks: As tracemaker of T. triassicus was Euthicarcinus sp. identified with high probability.