Parasacculina, 2020

Høeg, Jens T., Noever, Christoph, Rees, David J., Crandall, Keith A. & Glenner, Henrik, 2020, A new molecular phylogeny-based taxonomy of parasitic barnacles (Crustacea: Cirripedia: Rhizocephala), Zoological Journal of the Linnean Society 190, pp. 632-653 : 644

PARASACCULINA HØEG & GLENNER GEN. NOV.

Type species: Polyascus (syn. Sacculina ) shiinoi ( Lützen et al., 2016) .

LSID: urn:lsid:zoobank.org:act:EE2FD3C8-F9C1-49EE-AAE5-80176863160B

Diagnosis: As for the family, but, unlike Polyascus , without obligatory colonial externae.

Etymology: The name is chosen to indicate the close morphological similarity to species of Sacculina .

Species: Parasacculina leptodiae (Guerin-Ganivèt, 1911) , Parasacculina oblonga (Lützen & Yamaguchi,

1999), Parasacculina shiinoi ( Lützen et al., 2016) , Pa r a s a c c u l i n a s i n e n s i s (B o s c h m a, 1 9 3 3) a n d Parasacculina yatsui (Boschma, 1936) .

Remarks: The genus is paraphyletic, and this is at present the only practical solution. It consists of species formerly placed in Sacculina that by molecular data do not belong in the redefined Sacculinidae , but form a monophyletic unit together with, but not within, the monophyletic genus Polyascus . The type species has recently been investigated by both molecular and morphological methods, and type specimens are available and in good condition. Parasacculina (syn. Sacculina ) yatsui has previously (e.g. Glenner et al., 2010) been identified erroneously as Sacculina confragrosa Boschma, 1933 (see Kobayashi et al., 2018). A molecular analysis of the true Sacculina confragrosa has not yet been published.

FAMILY POLYSACCIDAE LÜTZEN & TAKAHASHI, 1996 (MONOGENERIC)

Type genus: Polysaccus Høeg & Lützen, 1993 .

Ty p e s p e c i e s: Po l y s a c c u s (s y n. Th o m p s o n i a) mediterraneus (Caroli, 1929) .

Diagnosis: By morphology as in the study by Øksnebjerg (2000). The molecular analysis clearly separates the only analysed species, Polysaccus japonicus Høeg & Lützen, 1993 , from all other families recognized here.