A recent paper by Watters et al. gives important insight in the relation of a group from the Annulariidae. Their abstract is as follows: “The subfamily Abbottellinae of the Annulariidae has been recognized as a speciose group in northern Hispaniola. This study, using phylogenetic (COI, 12S, H3), radular, and conchological characteristics, compared this group to other non-Hispaniolan annulariids to determine their wider associations and potential origin. Results indicate that the subfamily is related to the eastern Cuban Annularisca sensu lato and that genus should be moved to the Abbottellinae. The group dates from the time when eastern Cuba and northern Hispaniola were in close contact prior to tectonic movement. This is the first such zoo- geographic connection reported for the family. The subfamily is not related to any Jamaican taxa tested. The Abbottellinae also do not occur on the southern Tiburon/Barahona peninsulas of Hispaniola, which has a different geologic history from the north. The eastern Cuban and Bahamian genus Opisthosiphon sensu lato was also shown to be a member of the subfamily. The nominal genus Abbottella is further divided into new genera based on these results. The new genera Abbottipoma, Arenabbottella, Microabbottella, and Preclaripoma are described. The new species Rolleia simonaikeni is described, and Petasipoma is synonomized with Rolleia.“.
Another paper from this very productive lab, of which its leading figure Tom Watters recently died. It shows how the molecules combined with the external morphology presents new insights in the taxonomy of a group and also elucidates the evolution and relationships with other Annulariids.
Watters, G.T. et al., 2020. The subfamily Abbottellinae (Gastropoda: Annulariidae): origins, associations, and a review of the Hispaniolan taxa. – The Nautilus 134(1): 1-34.