Trace-Fossil Systematics - Trace Fossils as Indicators of Sedimentary Environments - page 88

Bioerosional trace fossils

Branched Unbranched

* Calciroda
Chaetophorites
Clionoides
* Cunctichnus
Feldmannia
Foraripora
Ichnoreticulina
Orthogonum
Scolecia

Anobichnium
Carporichnus
Helicotaphrichnus
Linckichnus
Palaeosabella
Pecinolites
E Podichnus
Ramosulcichnus
Stipitichnus
Trypanites
Tubulohyalichnus

Bifurcating Cylindrical

Pouches

Cavernula

Dekosichnus
E lacrimichnus
E Leptichnus
Osprioneides
Paleoipidus
Xylonichnus

Sacks Saccomorpha

Curvichnus
Scolytolarvariumichnus

Elliptical

Circular

Abeliella
Fascichnus
Polyactina
Rhopalia

Radial

Bascomella
Cubiculum

Ovoid

Belichnus
Flagrichnus
Gastrochaenolites
Phrixichnus
Sanctum
Teredolites

E Kardopomorphos
Spirichnus

Spiral

Clavate

Clionolithes
Dendrina
Dendrorete
Hyellomorpha
Nododendrina
Platydendrina
Pyrodendrina
Ramodendrina
Semidendrina
Stellichnus

Granulohyalichnus
Lamniporichnus
Planobola

Rosetted

Spheroidal

Lapispecus
Maeandropolydora

Winding

E Centrichnus
E Fossichnus
Osteocallis
Paleobuprestis
Petroxestes
Radulichnus
E Renichnus
Sulcichnus

Calcideletrix
E Cicatricula
Dictyoporus
Entobia
Filuroda
Ichnogutta
*Iramena
Paleoscolytus
Pennatichnus
Pinaceocladichnus
Ropalonaria
Talpina

Groove

Network

U-shaped

Caulostrepsis

Aurimorpha
Rogerella
Umbichnus
E Anellusichnus
Circolites
Dipatulichnus
Lazaichnus
Oichnus
Planovolites
* Tremichnus
* Sedilichnus
Tombownichnus

Pouches

Cycalichnus
Eurygonum

Boxwork

Circular

Underlined ichnotaxa may be branched or unbranched
Ichnotaxa in green font are microbioerosional (<1 mm)
*Taxonomic status unclear
E Surficial etching trace

Gnathichnus
Stellatichnus

Stellate

I rregular-sub
crescentic

Bicrescomanducator

FIGURE 3 Morphological classification of bioerosional trace fossils made by invertebrates. See
text for details and Lists 3 and 4 for complete lists of valid and invalid ichnogenera, including ref-
erences (Supplementary Material: http://booksite.elsevier.com/9780444538130 ) .