Tetrachaelasma southwardi Newman & Ross, 1971. Specimen (MACN-In 44478g): A. Rostral view; B. Carinal view; C, D. Left and right carinolateral views, respectively; E. Top view. Specimen (MACN-In 44479a, columnar) with a small specimen (MACN-In 44479b) attached to its rostrum: F. Left carinolateral view; G. Carinal view; H. Top view. Scale bars: 10 mm.

 
 
  Part of: Chiesa IL, Pereira E, Roccatagliata D (2024) On the occurrence of the deep-sea barnacle Tetrachaelasma southwardi Newman & Ross, 1971 (Cirripedia, Balanomorpha, Bathylasmatidae) in the Mar del Plata Submarine Canyon, Argentina: supplementary description and taxonomic remarks on the genus. Zoosystematics and Evolution 100(2): 603-623. https://doi.org/10.3897/zse.100.118912