Pollicipes rigida

• Main Authors: Jagt, John W. M., Zonova, Tatiana D., Jagt-Yazykova, Elena A.
• Format: Text
• Language: unknown
• Published: Zenodo 2007
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Maxillopoda; Pedunculata; Pollicipedidae; Pollicipes; Pollicipes rigida; Alexander Island; Antarctic; Antarc*; British Antarctic Survey
• Online Access: https://dx.doi.org/10.5281/zenodo.6247746; https://zenodo.org/record/6247746

Pycnolepas rigida (J. de C. Sowerby, 1836) Original description. J. de C. Sowerby (1836: 335, pl. 11, fig. 6, as Pollicipes rigidus ). Type. Lectotype, designated by Withers (1914: 170), is a scutum illustrated by J. de C. Sowerby (1836); current whereabouts unknown. Locality and stratigraphy. Folkestone, southeast England; lower Gault (middle Albian). Remarks. Va l v e s o f P . rigida are transversely, and generally also longitudinally, ridged; scutum elongatetriangular, with basilateral portion produced and with narrow wall-sided ridge curving from apex to basilateral angle; tergum with apical portion much curved towards scutum and with ridge like that of scutum, curving from apex to basal angle; width of imbricating plates exceeding height. Lot NHMM 2006 0 20 (leg. J.S.H. Collins), comprising isolated scuta, terga, rostra and carinae from the Albian of Bedfordshire (England), shows the wide range of variation of this taxon, expressed in valve proportions (length/width ratio), ornament (in particular, number and strength of longitudinal and transverse ribs) and width of apicobasal ridge (see Withers, 1935). Occurrence. Lower Albian (c. 108 – 107 Ma) to middle (?upper) Cenomanian (c. 93 – 92 Ma), England (Bedfordshire, Kent, Cambridge area) and France (Yonne, Haute-Marne); common in the lower Albian Leymeriella tardefurcata Zone, ranging throughout overlying Albian zones and extending into the Chalk Marl and higher (Cenomanian, Schloenbachia varians and Holaster [ = Crassiholaster ] subglobosus zones) (Collins, 1980; Carriol & Collins, 2000; Owen, 2002; Smith & Wright, 2003). : Published as part of Jagt, John W. M., Zonova, Tatiana D. & Jagt-Yazykova, Elena A., 2007, A review of the brachylepadomorph cirripede genus Pycnolepas, including the first record of an Early Cretaceous species from the Russian Far East *, pp. 33-47 in Zootaxa 1545 on page 36, DOI: 10.5281/zenodo.177977 : {"references": ["Sowerby, J. de C. (1836) Descriptive notes respecting the shells figured in Plates xi - xxiii (pp. 335 - 348), Appendix A. In: Fitton, W. H. Observations on some of the strata between the Chalk and the Oxford Oolite in the south-east of England. Transactions of the Geological Society of London, (2) 4, 103 - 389.", "Withers, T. H. (1914) Some Cretaceous and Tertiary Cirripedia referred to Pollicipes. The Annals and Magazine of Natural History, (8) 14, 167 - 206.", "Withers, T. H. (1935) Catalogue of fossil Cirripedia in the Department of Geology. Vol. II. Cretaceous. Trustees of the British Museum [Natural History], London, xiv + 535 pp.", "Collins, J. S. H. (1980) A new Pycnolepas (Cirripedia) from the (?) Lower Aptian of Alexander Island. British Antarctic Survey Bulletin, 50, 21 - 26.", "Carriol, R. - P. & Collins, J. S. H. (2000) New records of cirripedes (Crustacea, Thoracica) from the Albian of Yonne (France). Bulletin of the Mizunami Fossil Museum, 27, 141 - 145.", "Owen, H. G. (2002) The base of the Albian Stage; comments on recent proposals. Cretaceous Research, 23, 1 - 13.", "Smith, A. B. & Wright, C. W. (2003) British Cretaceous echinoids. Part 7, Atelostomata, 1. Holasteroida. Monograph of the Palaeontographical Society London, 156 (619), 440 - 568."]}