Since the 1960s, Chinese researchers have reported a series of bizarre paragastrioceratids associated with the endemic pseudohaloritids and/or kufengoceratins from the Restrictes-Sea area of Southeast China. They include Aulacogastrioceras, Chekiangoceras carinatum, "Paragastrioceras" dongwuliense Zhao & Zheng, Nodogastrioceras. All these taxa share the following characteristic features: 1) eight-lobed paragastrioceratid suture, 2) a variably shaped, evolute conch, and prominent sculpture with transverse ribs, nodes and coarse strigae in all ontogenetic stages, suggesting an affinity with the subfamily Paragastrioceratinae; 3) and, by contrast, a conspicuous ventral sinus  formed by growth lines and constrictions. indicating a phylogenetic relationship to the subfamily Pseudogastrioceratinae. These endemic Chinese paragstrioceratidae constitute the subfamily Aulacogastrioceratinae.