Corrupta, Korshunova & Fletcher & Martynov, 2025
publication ID |
https://doi.org/10.1093/zoolinnean/zlaf057 |
publication LSID |
lsid:zoobank.org:pub:D09886E-5D7C-40D1-B86A-118A3ADE5773 |
persistent identifier |
https://treatment.plazi.org/id/03EF87FE-FFF3-FF93-FE82-FF72FBFCFDDF |
treatment provided by |
Plazi |
scientific name |
Corrupta |
status |
gen. nov. |
Corrupta gen. nov.
( Figs 1, 2, 13; Table 5)
urn:lsid:zoobank.org:act:
Type species: Coryphella alexanderi Ekimova, 2022 .
Etymology: From the Latin corrupta meaning ‘damaged’ in reference to the discontinuous, incomplete notal edge in this genus compared to the well-defined, continuous notal edge in the sister-genus Himatina , and that according to the original description (Ekimova 2022: 45) most of the type specimens were damaged during collection.
Diagnosis: Body moderately narrow. Notal edge present, discontinuous. Cerata in several groups. Rhinophores smooth with fine wrinkles. Anterior foot corners present. Central teeth with non-compressed, narrow cusp, and distinct denticles. Lateral teeth denticulated with attenuated process basally. Only distal receptaculum seminis is illustrated, whereas in description both distal and proximal receptaculum seminis are mentioned. Vas deferens moderately long, distinct prostate, an oval penial sheath. Penis oval, partially broadened in the middle, tapering to a blunt conical end.
Species included: Corrupta alexanderi (Ekimova, 2022) comb. nov..
Remarks: Four Corrupta alexanderi comb. nov. form a maximal supported clade, sister, but with low support (PP = 0.97, BS = 51), to the Himatina clade ( Fig. 13). It should be noted that alignment of the 16S gene of C. alexanderi comb. nov. specimens WS14380, MIMB42469a, MIMB42469b, and MIMB42468 revealed 27 additional nucleotides in the WS14380 ( MZ821310 View Materials ) data (Supporting Information, Fig. S2A). Using all these data and simultaneously using GBlocks (which removed certain regions of the 16S gene), critically impacted the validity of the results of the molecular phylogenetic analyses in Ekimova et al. (2022). In the present study, data from MZ821310 View Materials and GBlocks were not used. Corrupta gen. nov. readily differs from Himatina ( Korshunova et al. 2017a) by the combination of a moderately narrow body with discontinuous notal edge, non-perfoliate rhinophores and by the considerably different details of the radular patterns including elongated-triangular central teeth of the radula, which are not nearly pectinate as in the genus Himatina . The new genus, therefore, significantly differs from the phylogenetically related Himatina , which well highlights the multilevel fine-scale diversity of external features, anatomy, and molecular phylogenetic data ( Figs 1, 13). There are several inconsistencies between the description and figures in the original description of C. alexanderi (Ekimova 2022) . Particularly, it is indicated on page 44 (op. cit.), that ‘Cerata in continuous rows, not united in separated groups’; however, in figure 2D (op. cit) distinct ceratal groups are clearly present. Furthermore, it is indicated on the same page that C. alexanderi has ‘Distinct distal and proximal receptaculum seminis, both small muscular sacs’; however, in figure 4 (Ekimova 2022: 47) only a single distal receptaculum seminis is unequivocally depicted (see also details in the Results in the present study). Finally, the penis is described as (p. 44, op. cit.) ‘broad, conical’, but the figure of the reproductive system (Ekimova 2022: fig. 4) clearly depicts that the penis is oval, only partially broadened in the middle, and at best tapered to a blunt conical ending, but surely not strictly ‘conical’ (Supporting Information, Fig. S2B). Given these clear inconsistencies in the new genus we have included descriptions of the characters that correspond to the respective figures, not to the likely erroneously described characters in the text of Ekimova (2022). Comparison of the new genus Corrupta gen. nov. with all valid, currently included Coryphellidae genera is presented in Table 5.
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