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The enigmatic kinorhynch Cateria styx Gerlach, 1956-A sticky son of a beach

Texto completo
Herranz, Maria [1, 2, 3] ; Di Domenico, Maikon [4] ; Sorensen, Martin V. [3] ; Leander, Brian S. [1, 2]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ British Columbia, Biodivers Res Ctr, Dept Zool, 2212 Main Mall, Vancouver, BC V6T 1Z4 - Canada
[2] Univ British Columbia, Biodivers Res Ctr, Dept Bot, 2212 Main Mall, Vancouver, BC V6T 1Z4 - Canada
[3] Univ Copenhagen, Nat Hist Museum Denmark, Univ Pk 15, DK-2100 Copenhagen - Denmark
[4] Univ Fed Parana, Ctr Estudos Mar, Pontal Do Parana - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: ZOOLOGISCHER ANZEIGER; v. 282, n. SI, p. 10-30, SEP 2019.
Citações Web of Science: 2

Since its discovery in the mid-1950'ies, Cateria has been an enigmatic kinorhynch genus due to its aberrant worm-like shape and extremely thin cuticle. However, the rare occurrence of the species, only found in sandy intertidal habitats, and the poor preservation of the type material have hampered detailed studies of the genus over time. Now, sixty years after the original description of Cateria styx, we present an extensive morphological and functional study based on new material collected from its type locality in Macae, Brazil. We combine live observations with detailed scanning electron microscopy data, new light microscopy material, confocal laser scanning microscopy and three-dimensional rendering. These observations show that C. styx displays a complex array of cuticular structures (spines, spinoscalids and extraordinarily complex cuticular ornamentation) that we interpret to be adaptations for mechanical adhesion, through friction and interlocking, in an interstitial habitat; the enigmatic dorsal organ, is a hydrostatic structure which function is inferred to be adhesive. Additional morphological traits in C. styx include: extremely elongated primary spinoscalids that cannot be completely retracted in the trunk; a reduced number of spinoscalids; sixteen elongated hairy patches in the introvert; fifteen trichoscalids that vary in length; the absence of a neck; dorsal spines being alternatingly displaced to either left or right side paradorsal positions; and high intraspecific variation in the number and position of glandular openings in the trunk. (C) 2019 Elsevier GmbH. All rights reserved. (AU)

Processo FAPESP: 12/08581-0 - Anelídeos intersticiais: sistemática e filogenia de uma fauna negligenciada
Beneficiário:Maikon Di Domenico
Linha de fomento: Bolsas no Brasil - Pós-Doutorado