Molecular analysis reveals a cryptic species of Chthamalus (Crustacea: Cirripedia) in the Cape Verde Islands

Yaron Tikochinski, Uzi Motro, Noa Simon-Blecher, Yair Achituv

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The intertidal barnacle Chthamalus stellatus has a broad distribution, occurring in the Mediterranean, the east Atlantic shores and east Atlantic Macaronesian Islands (Madeira, the Canaries and the Azores). Traditionally, based on morphological characters, Chthamalus of the Cape Verde Islands were also regarded as C. stellatus. However, using a mitochondrial gene and two nuclear genes, we found that although Chthamalus from Cape Verde is morphologically similar to C. stellatus, there are genetic differences between the two that are larger than those found between different species of Chthamalus. We thus claim that these genetic differences justify the assignment of the Cape Verde populations as an evolutionarily significant unit and a sister clade to C. stellatus. We also show that the connection between taxonomic units that are close to each other lies not only in the resemblance between DNA sequences. We have found that numerous point mutations characterizing the Cape Verde Chthamalus are present as infrequent alleles in C. stellatus, indicating that two close taxonomic units can also share polymorphisms present in their common ancestor.

Original languageEnglish
Pages (from-to)1072-1087
Number of pages16
JournalZoological Journal of the Linnean Society
Volume193
Issue number3
DOIs
StatePublished - 1 Nov 2021

Bibliographical note

Publisher Copyright:
© 2020 The Linnean Society of London, Zoological Journal of the Linnean Society.

Keywords

  • COI
  • Chthamalidae
  • EF1
  • Macaronesia
  • NaKA
  • barnacles
  • polymorphism
  • speciation

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