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TABLE 1. Fossils collected by the comparison group. Florida Museum of Natural History (FLMNH) received the specimens. FLMNH Invertebrate Paleontology Accession Number 2764 designates the invertebrate and ichnological portion of the specimens, and AN 2020.01.17 designates the vertebrate portion of the specimens.

Taxon Common Name DaBu DoEs KrJu
Anthozoa Corals 15 13 11
Batoidea Rays 69 71 68
Biota indeterminate Unidentifiable fossil material 84 123 26
Bivalvia Bivalves 51 18 39
Bromalites Digestion traces 21 16 40
Carcharhinus sp. Requiem sharks 15 13 24
Carcharias taurus Sand tiger shark 0 0 0
Cirripedia Barnacles 0 1 1
Cosmopolitodus hastalis Extinct broad-tooth mako shark 0 0 0
Crocodilia Crocodiles and alligators 1 2 0
Diodontidae Porcupinefish 8 1 2
Echinoidea Urchins 5 7 6
Elasmobranchii Unidentifiable shark teeth 38 54 19
Equidae Horses 0 0 1
Galeocerdo sp. Tiger sharks 0 0 3
Gastropoda Snails 121 122 69
Ginglymostoma delfortrei Extinct nurse shark 1 0 0
Glires Rodents or rabbits 1 0 0
Hemipristis serra Extinct snaggletooth shark 3 3 4
Ichnofossil indeterminate In-filled burrow fragments 51 50 32
Isurus oxyrinchus Shortfin mako shark 3 1 9
Lepisosteidae Gar fish 0 0 5
Microtus sp. Voles 1 0 1
Negaprion sp. Lemon sharks 28 11 18
Ophiomorpha Pellet-lined burrows 32 29 38
Osteichthyes Bony fish 5 1 4
Otodus megalodon Extinct mackerel shark 0 0 1
Physogaleus contortus Extinct ground shark 1 0 2
Rhizoprionodon terraenovae Atlantic sharpnose shark 5 1 4
Sciaenidae Drum fish 9 0 1
Serpulidae Tube worms 6 4 11
Sphyraena Barracudas 2 0 1
Sphyrna sp. Hammerhead sharks 3 2 4
Tetrapoda Tetrapods 2 3 5
  Total 566 533 438

 

 

TABLE 2. Participant data combined into populations based on self-reported experience and interest levels.

2a. Effects of experience and interest on identification.

Combination of factors Sdice with DaBu Sdice with DoEs Sdice with KrJu Sdice with GeeX
Some experience, moderate interest 0.60481 0.62813 0.59779 0.61024
Some experience, high interest 0.51622 0.52795 0.48098 0.50838
No experience, moderate interest 0.52569 0.50890 0.48427 0.50629
No experience, high interest 0.40972 0.42229 0.40864 0.41355

Note: Author names are abbreviated “DaBu” for Dava Butler, “DoEs” for Donald Esker, and “KrJu” for Kristopher Juntunen. GeeX combines data from the three authors, who each have substantial geology experience.

2b. Effects of experience and interest on identification.

Combination of factors Sbc with DaBu Sbc with DoEs Sbc with KrJu Sbc with GeeX
Some experience, moderate interest 0.46465 0.46844 0.44452 0.45920
Some experience, high interest 0.39164 0.41479 0.37225 0.39290
No experience, moderate interest 0.40725 0.41798 0.37685 0.40069
No experience, high interest 0.32206 0.34224 0.29795 0.32075

Note: Author names are abbreviated “DaBu” for Dava Butler, “DoEs” for Donald Esker, and “KrJu” for Kristopher Juntunen. GeeX combines data from the three authors, who each have substantial geology experience.

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