Cephalopoda - Ammonitida - Sonniniidae
Full reference: G. E. G. Westermann. 1969. The ammonite fauna of the Kialagvik Formation at Wide Bay, Alaska Peninsula. Part II. Sonninia sowerbyi zone (Bajocian). Bulletins of American Paleontology 57:1-226
Belongs to Witchellia according to G. E. G. Westermann 1969
Sister taxa: Witchellia albida, Witchellia australica, Witchellia companyi, Witchellia connata, Witchellia hyalina, Witchellia jugifera, Witchellia laeviuscula, Witchellia macer, Witchellia minima, Witchellia moisyi, Witchellia nodatipinguis, Witchellia peleka, Witchellia romanoides, Witchellia ruber, Witchellia sayni, Witchellia striata, Pelekodites (Spatulites) spatians
Type specimen: USNM 160243, a shell. Its type locality is USGS Mesozoic 21251, Wide Bay, which is in a Bajocian marine shale in the Kialagvik Formation of Alaska.
Ecology: fast-moving nektonic carnivore
Average measurements (in mm): shell diameter 83.5
Distribution:
• Jurassic of United States (8: Alaska collections)
Total: 8 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.