- Taxon calibrated
- Total group Astroscopus
- Minimum age
- 7.246 Ma
- Maximum 95% CI age
- 38.13 Ma
- Authority
- Carnevale et al. (2011)
- Locality
- St. Mary's Formation, USA
- Age Authority
- Tortonian, age estimate derived from Gradstein et al. (2012)
- Outgroup sequence
- Astroscopus countermani (Total group Astroscopus, 7.246 Ma)
- Archoplites clarki (Total group Archoplites, 15.4 Ma)
- Chaetodontidae indet. (Tholichthys larval stage) (Total group Chaetodontidae, 29.62 Ma)
- Luvarus necopinatus (Total group Luvarus, 54.17 Ma)
- Balkaria histiopterygia (Total group Tetraodontoidei, 55.8 Ma)
- Gasterorhamphosus zuppichinii (Total group Macrorhamphosa, 69.71 Ma)
- Aipichthys velifer (Total group Lampridformes, 98 Ma)
- Stichocentrus liratus (Total group Holocentroidei, 98 Ma)
- Apateodus glyphodus (Total group Aulopiformes, 103.13 Ma)
- Leptolepides haerteisi (Total group Euteleostei, 150.94 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: