Systematic re-structure and new species of Sphaerodoridae (Annelida) after morphological revision and molecular phylogenetic analyses of the North East Atlantic fauna

By

Capa, Maria
Nygren, Arne
Parapar, Julio
Bakken, Torkild, 1969-
Meißner, Karin
Moreira, Juan

Type

Article

Date of Publication

2019

Original Publication

ZooKeys

Volume

845

Pages

Jan-97

Subjects

16S rRNA , 18S rRNA , 28S rRNA , Classification , COI , identification key , integrative taxonomy , Morphology , new genus , new species , Phylogeny , systematics

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.845.32428

 

Abstract

Detailed morphological study of more than 2600 North East Atlantic (NEA) sphaerodorids (SphaerodoridaeAnnelida) and phylogenetic analyses of DNA sequences of representatives of several identified morphospecies enforced changing the current systematic classification within the family allowed the discovery of new species provided new information about the morphological and genetic characterisation of members of this group and increased the species occurrence data to better infer their geographic and bathymetric distribution ranges. Phylogenetic analyses of nuclear (18S rRNA and 28S rRNA) and mitochondrial sequences (COI and 16S rRNA) of NEA short-bodied sphaerodorids revealed outstanding results including paraphyly of the generaSphaerodoropsisSphaerodoridium, andSphaerephesia. The number of longitudinal and transverse rows of dorsal macrotubercles is proposed as potential synapomorphies for the main clades and are consequently herein used for the genera delimitation. The new classification proposed here implies nomenclatural changes and the erection of a new genusGeminofilumgen. n.to accommodate the species previously considered asSphaerodoropsiswith two transverse rows of dorsal macrotubercles per segment. Four species are being described herein:EuritmianordicaCapa & Bakkensp. n.SphaerephesiamultichaetaCapa Moreira & Paraparsp. n.SphaerephesiaponsiCapa Parapar & Moreirasp. n.andSphaerodoridiumceliaeMoreira Capa & Paraparsp. n.Characterisation of the other 21 species including updated iconography and an identification key to all NEA short-bodied sphaerodorids are provided.