Vol. 61, 2022
Phylogenetic Relationships and Taxonomic Position of the Genus Parahubrechtia (Nemertea, Palaeonemertea) with Descriptions of Two New Species
Alexei V. Chernyshev1,*, Neonila E. Polyakova1, and Shi-Chun Sun2
Zhirmunsky National Scientific Center of Marine Biology, Far Eastern
Branch, Russian Academy of Sciences, Palchevskogo Street 17,
Vladivostok 690041, Russia. *Correspondence: E-mail:
E-mail: firstname.lastname@example.org (Polyakova)
2Institute of Evolution & Marine Biodiversity,
Ocean University of China, 5Yushan Road, Qingdao 266003, China. E-mail:
Received 1 May 2021 / Accepted 13 May 2022
Communicated by Benny K.K. Chan
The genus Parahubrechtia
Gibson and Sundberg, 1999 was first described within the family
Hubrechtiidae (class Pilidiophora) and subsequently transferred to the
family Callineridae (class Palaeonemertea). Here we describe two new
species, Parahubrechtia rayi sp. nov. from the Sea of Japan (Russia) and P. peri sp.
nov. from the South China Sea (China). A phylogenetic analysis based on
partial sequences of five nuclear and mitochondrial gene regions, 18S rRNA, 28S rRNA, histone H3, 16S rRNA, and COI, has confirmed the monophyly of the genus Parahubrechtia, and indicated a close relationship to Callinera
Bergendal, 1900, whose monophyly is not confirmed. Both genera belong
to the family Tubulanidae, with its junior synonym being Callineridae.
Three major subclades are distinguished within the Tubulanidae:
subclade Tubulanus s. str., subclade Tubulanus punctatus, and subclade Parahubrechtia + Callinera. The further status of Parahubrechtia depends on whether the paraphyly of Callinera is confirmed or not and how the problem of paraphyly of the genus Tubulanus Renier, 1804 is resolved.
Key words: Nemerteans, Callinera, Tubulanidae, cLSM, Phylogenetic analysis, Larva.
Citation: Chernyshev AV, Polyakova NE, and Sun SC. 2022. Phylogenetic relationships and taxonomic position of the genus Parahubrechtia (Nemertea, Palaeonemertea) with descriptions of two new species. Zool Stud 61:38.