Steginoporella magnilabris ( Busk, 1854 )

Ramalho, Laís V., Taylor, Paul D., Moraes, Fernando Coreixas, Moura, Rodrigo, Amado-Filho, Gilberto M. & Bastos, Alex C., 2018, Bryozoan framework composition in the oddly shaped reefs from Abrolhos Bank, Brazil, southwestern Atlantic: taxonomy and ecology, Zootaxa 4483 (1), pp. 155-186: 157-158

publication ID

https://doi.org/10.11646/zootaxa.4483.1.6

publication LSID

lsid:zoobank.org:pub:05A08470-9473-4147-B54B-AB0C90173572

persistent identifier

http://treatment.plazi.org/id/6C3EF226-FFA7-790D-FF43-FA30FBDCFD72

treatment provided by

Plazi

scientific name

Steginoporella magnilabris ( Busk, 1854 )
status

 

Steginoporella magnilabris ( Busk, 1854) 

( Figs 2AView FIGURE 2, 7A–BView FIGURE 7)

Membranipora magnilabris Busk, 1854: 62  (part), 113.

Steganoporella magnilabris: Marcus, 1955: 284  , fig. 25; Cook, 1964: 53, figs 2, 4.

Steginoporella magnilabris: Winston, 1986: 10  ; Winston, 2005: 29, figs 73–75; Winston & Woollacott, 2009: 252, fig. 11; Winston et al., 2014: 150, fig. 6; Almeida et al., 2015a: 4; Winston, 2016: 8, fig. 2; Vieira et al., 2016: 77, fig. 16l; Bastos et al., 2018: table 1.

Material examined. Abrolhos Bank, Bahia State, Brazil: MNRJ-Bry1336, California Reef, 25 m depth, March 2015, col. F.C. Moraes, R. Moura, G. Amado-Filho & A  . Bastos ; Abrolhos Archipelago, Bahia State, Brazil: MNRJ-Bry323 ( Fig. 2AView FIGURE 2), MNRJ-Bry324, Redonda Island, April 2000, col. C.E.L. Ferreira. 

Short description. Fragments of colonies erect and frondose ( Fig. 7A, BView FIGURE 7); beige in colour. Autozooids rectangular, arranged quincuncially ( Fig. 2AView FIGURE 2); A-zooids of smaller size, rectangular, orifice D-shaped ( Fig. 2AView FIGURE 2) with a pair of prominent condyles on the proximal corners; B-zooids larger in size ( Fig. 2AView FIGURE 2), operculum almost square, sclerite inverted Y-shaped, with numerous strong and curved teeth decreasing in size towards lateral border. Cryptocyst perforated by small pores, slightly concave, forming a depressed median process with an associated polypide tube ( Fig. 2AView FIGURE 2).

Geographic distribution. Caribbean (Winston 1986). Brazil: Rio de Janeiro, Espírito Santo, Bahia, Alagoas States ( Busk 1854; Marcus 1955; Winston et al. 2014; Almeida et al. 2015a; Vieira et al. 2016; Bastos et al. 2018; present study).

Remarks. Four species of Steginoporella  have been described from Brazil: S. magnilabris Busk, 1852  , S. buskii Harmer, 1900  (as S. transversalis  by Canu & Bassler 1928a), S. connexa Harmer, 1900  , and S. evelinae Marcus, 1949  ( Busk 1854; Canu & Bassler 1928a; Marcus 1938, 1949, 1955; Cook 1964; Braga 1968, Winston et al. 2014; Almeida et al. 2015a; Vieira et al. 2016).

Steginoporella magnilabris  was recorded from the AB by Busk (1854) ( NHMAbout NHM 1854.11.15.222), Almeida et al. (2015a) and Bastos et al. (2018). It can be distinguished from S. buskii  , which has A-zooid and B-zooid of similar size, and the operculum of the B-zooids has numerous, small or sometimes vestigial teeth. Steginoporella connexa  has a cryptocyst pierced by two narrow opesiules on each side, while S. evelinae  has two large projecting tubercles adjacent to the orifice and the edges of the opesiules bear small sharp pointed denticles.

NHM

University of Nottingham

Kingdom

Animalia

Phylum

Bryozoa

Class

Gymnolaemata

Order

Cheilostomatida

Family

Steginoporellidae

Genus

Steginoporella

Loc

Steginoporella magnilabris ( Busk, 1854 )

Ramalho, Laís V., Taylor, Paul D., Moraes, Fernando Coreixas, Moura, Rodrigo, Amado-Filho, Gilberto M. & Bastos, Alex C. 2018

2018
Loc

Membranipora magnilabris

Busk, 1854 : 62

Loc

Steganoporella magnilabris:

Marcus, 1955 : 284 Cook, 1964 : 53

Loc

Steginoporella magnilabris:

Winston, 2005 : 29 Winston & Woollacott, 2009 : 252 Winston et al., 2014 : 150 Almeida et al., 2015a : 4 Vieira et al., 2016 : 77