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WoRMS name details
original description
Chan, B. K. K.; Dreyer, N.; Gale, A. S.; Glenner, H.; Ewers-Saucedo, C.; Pérez-Losada, M.; Kolbasov, G. A.; Crandall, K. A.; Høeg, J. T. (2021). The evolutionary diversity of barnacles, with an updated classification of fossil and living forms. <em>Zoological Journal of the Linnean Society.</em> , available online at https://doi.org/10.1093/zoolinnean/zlaa160 [details] 
basis of record
Southward, A.J. (2001). Cirripedia - non-parasitic Thoracica, <B><I>in</I></B>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels,</i> 50: pp. 280-283 (look up in IMIS) [details]
additional source
Martin, J.W., & Davis, G.E. (2001). An updated classification of the recent Crustacea. <em>Science Series, 39. Natural History Museum of Los Angeles County. Los Angeles, CA (USA).</em> 124 pp. (look up in IMIS) [details] Available for editors  [request]
 Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Additional information In Chan et al. (2021): The name Sessilia is used for the monophyletic taxon comprising the Verrucomorpha and the Balanomorpha. In most analyses, these two orders are sister groups with high support (Figs 7, 8). We recognize this relationship but decided to leave the Sessilia clade without a formal rank, because we can then conveniently have the Verrucomorpha
and Balanomorpha as orders. The Sessilia name refers to the lack of a peduncle but is misleading because such loss also occurred convergently in the Neolepadoidea (Neoverrucidae). The verrucomorphans and balanomorphans are otherwise morphologically
and biologically distinct. The Verrucomorpha has a strongly asymmetrical disposition of the wall plates and an opercular lid formed by a movable scutum and tergum (Darwin, 1851; Gale, 2014b). The Balanomorpha, often called acorn barnacles, are perfectly symmetrical, with an operculum that evolved convergently with the verrucomorphans and a wall that includes so-called marginal plates unique to that lineage (Gale & Sørensen, 2014). The ‘sessilian’ forms
lack a peduncle, both as adults and during ontogeny,
and this can be seen as a synapomorphy that evolved
in their brachylepadid ancestors, such as Pycnolepas
Withers, 1914 (Gale, 2014b). The two extant lineages
have independently lost the upper latus and
imbricating peduncular plates. [details]
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