- Taxon calibrated
- Total group Echelus
- Minimum age
- 53.7 Ma
- Maximum 95% CI age
- 148.6 Ma
- Authority
- Santini et al. (2013), Young (1993), Young & Williams (2008)
- Locality
- London Clay (Division B2), Aveley Quarry, UK
- Age Authority
- NP11 based on Friedman et al. (2016), age estimate derived from Gradstein et al. (2012)
- Outgroup sequence
- Echelus branchialis (Total group Echelus, 53.7 Ma)
- Baugeichthys caeruleus (Albuliformes + Anguilliformes, 129.4 Ma)
- Anaethalion zapporum (Crown Teleostei, 151.2 Ma)
- Occithrissops willsoni (stem Teleostei 5, 166.1 Ma)
- Leptolepis coryphaenoides (stem Teleostei 4, 181.7 Ma)
- Dorsetichthys bechei (stem Teleostei 3, 193.81 Ma)
- Knerichthys bronni (stem Teleostei 2, 221 Ma)
- Prohalecites porroi (stem Teleostei 1, 236 Ma)
- Watsonulus (stem Halecomorphi 1, 251.2 Ma)
- Taxa this fossil might apply to:
- Class: Actinopteri
- Subclass: Neopterygii
- Infraclass: Teleostei
- Megacohort: Elopocephalai
- Supercohort: Elopocephala
- Cohort: Elopomorpha
- Order: Anguilliformes
- Family: Ophichthidae