Saevitella peristomata ( Waters, 1899 ) Waters, 1899

Berning, Björn, 2012, Taxonomic notes on some Cheilostomata (Bryozoa) from Madeira, Zootaxa 3236, pp. 36-54 : 44-46

publication ID

https://doi.org/ 10.5281/zenodo.211022

publication LSID

lsid:zoobank.org:pub:B3352C63-4FFD-40D2-9EE4-379BA807F49A

DOI

https://doi.org/10.5281/zenodo.5667280

persistent identifier

https://treatment.plazi.org/id/8B497008-BE7C-FFC0-AE8C-FE40FF62FE6D

treatment provided by

Plazi

scientific name

Saevitella peristomata ( Waters, 1899 )
status

comb. nov.

Saevitella peristomata ( Waters, 1899) View in CoL n. comb.

( Figs 13–18 View FIGURES 13 – 18 , Table 3)

‘L.[epralia] mangnevilla Aud.’: Busk 1860: 284, pl. 31, fig. 5; non Cellepora mangnevillana Lamouroux, 1816 .? Lepralia pallasiana: Hincks 1880: 77 , pl. 10, fig. 3; non Eschara pallasiana Moll, 1803 . Lepralia peristomata Waters, 1899: 10 , pl. 3, fig. 20; Norman 1909: 305.

? Cosciniopsis peristomata: Cook 1968: 182 .

Material examined. Lectotype: MMF 42043a (here designated), the only bleached specimen on slide; material from Madeira, collected by J. Y. Johnson from a fish basket trap in 1880 (no further information provided as to the exact location or depth). Paralectotypes: MMF 42043b–e, the remaining unbleached specimens on the same slide as holotype; judging by residual glue in the slide cavity, one specimen of the original suite is missing.

Description. Colony encrusting, unilaminar, multiserial. Zooids subhexagonal, broadest at about mid-distance, separated by shallow grooves or indistinct sutures. Frontal shield only slightly convex, entirely and regularly perforated by numerous round pseudopores separated by nodular ridges. Primary orifice elliptical with a fairly straight proximal margin, slightly longer than wide, broadest in distal third, condyles indistinct in frontal view, pointing downwards, demarcating proximal fourth of total orifice length, visible in an oblique view only; operculum with a pair of small frontal tubercles situated in the proximal fourth; flared peristome entirely surrounding orifice, the interior smoothly calcified with longitudinal striations, outline variable, from oval with relatively straight or wavy lateral margins to 8-shaped with central indentations almost meeting in centre; orifice in ovicellate zooids only slightly dimorphic, distal margin of peristome formed by proximal ooecial rim and is rather vertically oriented and lower than lateral peristomial margins; oral spines absent.

ZL ZW OL OW OvL OvW mean 630 419 149 125 171 279 SD 43 60 11 7 16 23 min. 556 286 121 108 153 242 max. 707 509 166 134 200 318 n 19 19 16 16 14 14

Ovicell subimmersed, endooecium hemispherical, fused onto distal zooecial margin of maternal zooid, broader than long, largely immersed by secondary calcification of distal zooid during ontogeny, surface similar to frontal shield but with smaller and rather elongated pseudopores and relatively thicker and steeper interjacent ridges; proximal ooecial margin concave, the slightly raised ridge fused with lateral peristomial walls of maternal zooid; closed by operculum.

Avicularia absent.

Ancestrula not observed.

Remarks. The colonies here designated as (para-) lectotypes were given to Waters for identification by James Yates Johnson and were subsequently returned to the MMF. As Waters (1899) figured only an operculum when introducing Lepralia peristomata , the figured specimen cannot be determined. Hence, I chose the colony in which zooecial and ooecial characters were best displayed.

Saevitella peristomata View in CoL is morphologically very similar to the type species S. inermis Bobies, 1956 View in CoL . Differences are found in orifice shape, which is slightly broader than long in S. inermis View in CoL , and the peristome, which is rather round or transversely elliptical in outline and not as flared as in S. peristomata View in CoL .

Waters' (1899) and Norman's (1909) view that the Madeiran specimens identified as Lepralia mangnevilla [sic] by Busk (1860) are conspecific with S. peristomata View in CoL is upheld here. The species described and figured as Lepralia pallasiana [= Cryptosula pallasiana ( Moll, 1803) View in CoL ] by Hincks (1880) is also very similar and could be conspecific as well.

Saevitella peristomata View in CoL was sampled around Madeira at depths of 25– 130 m. It was subsequently also reported from the Cape Verde and Canary Islands by Waters (1918: 21) and (as Cosciniopsis peristomata ) by Cook (1968: 182), Arístegui & Cruz (1986: 166), and Arístegui (1987). However, these records need to be checked for conspecificity.

MMF

Museu Municipal do Funchal

Kingdom

Animalia

Phylum

Bryozoa

Class

Gymnolaemata

Order

Cheilostomatida

Family

Hippopodinidae

Genus

Saevitella

Loc

Saevitella peristomata ( Waters, 1899 )

Berning, Björn 2012
2012
Loc

Cosciniopsis peristomata:

Cook 1968: 182
1968
Loc

Saevitella peristomata

Aristegui 1986: 166
Cook 1968: 182
Waters 1918: 21
1918
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