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������FAMILY PACHYDIADEMATIDAE FAM. NOV. Z o o b a n k r e g i s t r a t i o n: l s i d: u r n: l s i d: z o o b a n k. org:act: A16DF979-F1B2-4678-87F3-D3753B05F90B ��� ��� Pa ch y d i a d e m a Wi t h e r s, 1 9 3 5 (T y p e g e n u s) (Cretaceous) (one species), Published as part of Chan, Benny K. K., Dreyer, Niklas, Gale, Andy S., Glenner, Henrik, Ewers-Saucedo, Christine, P��rez-Losada, Marcos, Kolbasov, Gregory A., Crandall, Keith A. & H��eg, Jens T., 2021, The evolutionary diversity of barnacles, with an updated classification of fossil and living forms, pp. 789-846 in Zoological Journal of the Linnean Society 193 on page 833, DOI: 10.1093/zoolinnean/zlaa160, http://zenodo.org/record/5637275

��� ORDER BALANOMORPHA PILSBRY, 1916 Diagnosis: Monophyletic in molecular analyses. A peduncle is absent at all stages of development; shell wall made up of four to eight plates, plesiomorphically comprising rostrum, carina, rostromarginals, marginals and carinomarginals.The body is covered by an operculum formed by the paired scuta���terga; the operculum articulates with the wall plates and forms a watertight cover over the mantle cavity. The structure of the wall plates and articulation with the basis is often complex in more derived balanomorphs; the apicobasal (longitudinal) septa are composed of a frond-like array of calcite crystals in cross-section, called an interlaminate figure. Comment: In some forms, the wall is surrounded by one or more whorls of small-sized imbricating scales, as also seen in the Brachylepadomorpha., Published as part of Chan, Benny K. K., Dreyer, Niklas, Gale, Andy S., Glenner, Henrik, Ewers-Saucedo, Christine, P��rez-Losada, Marcos, Kolbasov, Gregory A., Crandall, Keith A. & H��eg, Jens T., 2021, The evolutionary diversity of barnacles, with an updated classification of fossil and living forms, pp. 789-846 in Zoological Journal of the Linnean Society 193 on page 833, DOI: 10.1093/zoolinnean/zlaa160, http://zenodo.org/record/5637275

††FAMILY PACHYDIADEMATIDAE FAM. NOV. Z o o b a n k r e g i s t r a t i o n: l s i d: u r n: l s i d: z o o b a n k. org:act: A16DF979-F1B2-4678-87F3-D3753B05F90B † † Pa ch y d i a d e m a Wi t h e r s, 1 9 3 5 (T y p e g e n u s) (Cretaceous) (one species)

We present a comprehensive revision and synthesis of the higher-level classification of the barnacles (Crustacea: Thecostraca) to the genus level and including both extant and fossils forms. We provide estimates of the number of species in each group. Our classification scheme has been updated based on insights from recent phylogenetic studies and attempts to adjust the higher-level classifications to represent evolutionary lineages better, while documenting the evolutionary diversity of the barnacles. Except where specifically noted, recognized taxa down to family are argued to be monophyletic from molecular analysis and/or morphological data. Our resulting classification divides the Thecostraca into the subclasses Facetotecta, Ascothoracida and Cirripedia. The whole class now contains 14 orders, 65 families and 367 genera. We estimate that barnacles consist of 2116 species. The taxonomy is accompanied by a discussion of major morphological events in barnacle evolution and justifications for the various rearrangements we propose.

Due to the extreme scarcity of specimens, little is known about the biodiversity and biogeography of the barnacles of the genus Waikalasma Buckeridge, 1983 (Thoracica: Waikalasmatidae Ross and Newman, 2001), which inhabit the deep sea of the Southwest Pacific. Previous studies reported only a single living species, W. boucheti Buckeridge, 1996, from Vanuatu. In the present study, the collections by French deep-sea expeditions off New Caledonia (NORFOLK 1 & 2, EBISCO, SMIB 2, SMIB 4, SMIB 8, BIOCAL, MUSORSTOM 6, MUSORSTOM 4, MUSORSTOM 5, BATHUS 2), the Solomon Islands (SALOMON 1), Vanuatu (BOA1) and Papua New Guinea (BIOPAPUA) yielded specimens of Waikalasma species from 500 to 800 m depth. From molecular (DNA barcode region cytochrome c oxidase subunit I (COI) and 12S gene) and morphological analysis, a new species Waikalasma dianajonesae sp. nov., and W. boucheti were identified. From molecular phylogenetic analysis, sequence divergence in the DNA barcode region between W. dianajonesae sp nov. an...

Young, Paulo S. (2000): Cirripedia Thoracica (Crustacea) collected during the "Campagne de La Calypso (1961-1962)" from the Atlantic shelf of South America. Zoosystema 22 (1): 85-100, DOI: http://doi.org/10.5281/zenodo.5395280