Rhynchozoon rostratum : Bastos et al ., 2018
Bryozoan framework composition in the oddly shaped reefs from Abrolhos Bank, Brazil, southwestern Atlantic: taxonomy and ecology
Ramalho, Laís V.
Taylor, Paul D.
Moraes, Fernando Coreixas
Moura, Rodrigo
Amado-Filho, Gilberto M.
Bastos, Alex C.
Zootaxa
2018
2018-09-20
4483
1
155
186
6WW3M
(Busk, 1856)
Busk
1856
[151,655,1589,1615]
Gymnolaemata
Phidoloporidae
Rhynchozoon
GBIF
Animalia
Cheilostomatida
22
177
Bryozoa
species
rostratum
Rhynchozoonsp.: Reis et al., 2016: supplementary table.
Rhynchozoon rostratum: Bastos et al., 2018: table 1.
Materialexamined. Abrolhos Bank, BahiaState, Brazil: MNRJ-Bry1338, Parcel dos Abrolhos, 15 mdepth, February 2014, col. R. Moura, G. Amado-Filho & A. Bastos; MNRJ-Bry1374, Parcel dos Abrolhos, 4 mdepth, February 2014, col. R. Moura, G. Amado-Filho & A. Bastos. Short description.Colonies encrusting, multilamellar; zooids initially orderly but becoming irregularly arranged. Frontal wall tuberculate with areolar pores only ( Fig. 6D). Primary orifice with distinct rounded sinus, hidden by the development of the peristome; tubercles sometimes present, varying in number and size ( Fig. 6D, E). Oral and frontal avicularia of similar shape and size, crossbar complete, the frontal avicularium triangular, diamond-shaped and distolaterally or laterally directed ( Fig. 6E); oral avicularium single ( Fig. 6F) directed laterally. Ovicells not observed.
Geographic distribution. Indonesia, E. Pacific, Caribbean and Gulf of Mexico ( Busk 1856; Winston & Heimberg 1986); Abrolhos Bank, Bahia State ( Reis et al. 2016; Bastos et al. 2018; present study).
Remarks. Rhynchozoon verruculatum( Smitt, 1873)is very similar to R. rostratum, but it differs from the latter in having larger zooids, a shallow U-shaped sinus, more elongated diamond-shaped frontal avicularia, and ovicells that are completely immersed. Rhynchozoon brasiliensis Almeida et al., 2017, also known from BahiaState, has a primary orifice with a V-shaped sinus, the peristomial avicularium is absent, and the frontal avicularium is variously oriented. Two other Brazilian Rhynchozoonspecies are distinct: R. coalitum Vieira et al., 2010has only a suboral avicularium and lacks vicarious avicularia, while R. phrynoglossum Marcus, 1937has large vicarious avicularia with truncate or tongue-shaped mandibles. The colonies found in the studied cores were poorly preserved, making a more precise identification difficult.
1913860743
2014-02
Parcel dos Abrolhos & R. Moura
Brazil
15
Material
Abrolhos Bank
22
177
1
Bahia
1913860732
2014-02
Parcel dos Abrolhos & R. Moura
Brazil
4
Bastos
22
177
1
Bahia