Pachylasmatinae
| Autor: | Newman, William A., Jones, William J. |
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| Rok vydání: | 2011 |
| Předmět: | |
| DOI: | 10.5281/zenodo.5667568 |
| Popis: | Subfamily Pachylasmatinae Utinomi, 1968 Remarks. The Pachylasmatinae, as per the landmark revision of Jones (2000), encompasses five genera; Eutomolasma Jones, 2000: 166 (four species), Microlasma Jones, 2000: 177 (four species), Pachylasma Darwin, 1854: 185 (eight species), Eurylasma Jones, 2000: 201 (three species), and Tetrapachylasma Foster, 1988: 215 (five species). All, except the type of Tetrapachylasma, have an eight-plated stage early in ontogeny, albeit the rostrum is generally tripartite, RL-R-RL, and the carinolaterals, CL 1 -CL 2, are partially concrescent. These tendencies are preludes to the pure four-platedness seen in Tetrapachylasma s.s. Therefore, acceptance of Tetrapachylasma as a monophyletic taxon must be viewed with caution. The wall of the new genus, to be proposed below, is like that of a Tetrapachylasma s.s. in that it displays not a hint of having had more than four plates making up its wall early in ontogeny. On the other hand, as we shall see, it displays the most generalized opercular plates known to any balanomorph and, therefore, stands well apart from other pachylasmatines including the other species of Tetrapachylasma. Published as part of Newman, William A. & Jones, William J., 2011, Two Northeast Pacific deep-water barnacle populations (Cirripedia: Calanticidae and Pachylasmatidae) from seamounts of the Juan de Fuca Ridge; " insular " endemics stemming from Tethys, or by subsequent dispersal from the Western Pacific center of distribution?, pp. 49-68 in Zootaxa 2789 on page 60, DOI: 10.5281/zenodo.202501 {"references":["Utinomi, H. (1968) A revision of the deep-sea barnacles Pachylasma and Hexelasma from Japan, with a proposal of new classification of the Chthamalidae (Cirripedia, Thoracica). Publications of the Seto Marine Biological Laboratory, 16 (1), 21 - 39.","Jones, D. S. (2000) Crustacea Cirripedia Thoracica: Chionelasmatoidea and Pachylasmatoidea (Balanomorpha) of New Caledonia, Vanuatu and Wallis and Futuna Islands, with a review of all currently assigned taxa. In: Crosnier, A. (ed.), Resultats des Campagne MUSORSTOM 21. Memoires du Museum national d'Historie naturelle, 184, 141 - 283.","Darwin, C. (1854) A monograph on the subclass Cirripedia, with figures of all species, the Balanidae, the Verrucidae etc. Pp 1 - 684 + pls 1 - 30. Ray Society, London.","Foster, B. A. (1988) Tetrapachylasma: A new genus for a shallow water pachylasmatid barnacle from the Cook Islands. Crustaceana, 55 (3), 225 - 233."]} |
| Databáze: | OpenAIRE |
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