FIGURE 3 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans

FIGURE 3. Exposed gills of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota and an interpretative drawing. 1-4: inferred number of gills;?af: possible afferent vessel.