Pseudocrangonyx Akatsuka & Komai, 1922
publication ID |
https://doi.org/ 10.11646/zootaxa.3693.4.8 |
publication LSID |
lsid:zoobank.org:pub:A6973F27-B9FA-4C3E-A2C3-BB4C1BBCE1E0 |
DOI |
https://doi.org/10.5281/zenodo.5657790 |
persistent identifier |
https://treatment.plazi.org/id/F21A8787-FF90-F700-E6A6-FB76FCB64D59 |
treatment provided by |
Plazi |
scientific name |
Pseudocrangonyx Akatsuka & Komai, 1922 |
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Genus Pseudocrangonyx Akatsuka & Komai, 1922 View in CoL
syn.: Pseudocrangonyx Akatsuka & Komai, 1922 , p. 120, figs 1, 2, (orig. descrip.)—Tomikawa et al. 2008, p. 276 (type species redescrip.)
Type species. Pseudocrangonyx shikokunis Akatsuka & Komai, 1922 [type loc.—water well in Tomioka, Tokushima Prefecture, Shikoku Isl., Japan]
Remarks. Although phenotypic features clearly differentiated a new species from other representatives of the genus Pseudocrangonyx , we compared mt- cox1 sequences from 7 members of the genus to confirm their distinctness. The newly described species well as P. f e b r a s, P. kseniae , and P. korkishkoorum that are also known from Primory and P. susunaensis from neighboring Sakhalin were analyzed.
Each amphipod specimen sequenced for this study was characterized by a unique cox1 sequence ( Fig. 2 View FIGURE 2 ). Five highly similar (pairwise distances 0.025–0.003) P. korkishkoorum accessions KF153105 View Materials – KF153109 View Materials formed moderately supported (75 %) clade further split into two subclades corresponding to closely located rivers Narva and Barabashevka. This lineage had P. tiunovi , sp. nov. as a sister (100 %). P. susunaensis and P. sympatricus , sp. nov. formed another moderately supported sister pair (79 %) with P. febras branching basally (68 %). Relationship between P. kseniae and P. holsingeri , sp. nov. remained unresolved in our analysis.
There was notable difference in pairwise distances between the sequences. The most distinct from each other were P. susunaensis and P. holsingeri , sp. nov. (0.201) while in most other cases the distances did not exceed 0.150–0.170. Only difference between P. korkishkoorum and P. tiunovi , sp. nov. did not exceed 0.076 although these species clearly differ morphologically (see below).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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