The maximum clade consisting of Persististrombus granulatus (Swainson, 1822) and Persististrombus nodosa (Borson, 1820) and all species that share a more recent common ancestor with them than Thetystrombus latus (Gmelin, 1791), Thetystrombus exbonellii (Sacco, 1893), Antestrombus chipolanus (Dall, 1890) or Edpetuchistrombus aldrichi (Dall, 1890).
Reference Phylogeny. Figure 3 in Maxwell et al. (2020).
Composition. A clade containing Persististrombus (see Maxwell et al. (2020) for content). It does not contain Thetystrombus (see Maxwell et al (2020) for content), Aligerina (see Maxwell et al. (2020) for content), Euprotomus (see Abbott (1960) for content), Lambis (see Abbott (1960) for content) or Gibberulus (see Abbott (1960) for content). Diagnostic Apomorphies. The shell with a sharp outer lip, anteriorly strongly quadrate and not axially reflected. The inner lip is granulated or lirate. The mid-body whorl with rows of nodules. The shell is solid and heavy, with an anterior canal that is reflected (Maxwell et al, 2020, p. 17).
Type Species. Persististrombus granulatus (Swainson, 1822).