Rhynchozoon aff. rostratum ( Busk, 1856 )

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: 177-180

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-FFB3-7917-FF43-F9FAFCD5FE77

treatment provided by

Plazi

scientific name

Rhynchozoon aff. rostratum ( Busk, 1856 )
status

 

Rhynchozoon aff. rostratum ( Busk, 1856) 

( Fig. 6D–FView FIGURE 6)

Rhynchozoon  sp.: Reis et al., 2016: supplementary table.

Rhynchozoon rostratum: Bastos et al., 2018  : table 1.

Material examined. Abrolhos Bank, Bahia State, Brazil: MNRJ-Bry1338, Parcel dos Abrolhos, 15 m depth, February 2014, col. R. Moura, G. Amado-Filho & A  . Bastos ; MNRJ-Bry1374, Parcel dos Abrolhos, 4 m depth, 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. 6DView FIGURE 6). Primary orifice with distinct rounded sinus, hidden by the development of the peristome; tubercles sometimes present, varying in number and size ( Fig. 6D, EView FIGURE 6). Oral and frontal avicularia of similar shape and size, crossbar complete, the frontal avicularium triangular, diamond-shaped and distolaterally or laterally directed ( Fig. 6EView FIGURE 6); oral avicularium single ( Fig. 6FView FIGURE 6) 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 Bahia State, has a primary orifice with a V-shaped sinus, the peristomial avicularium is absent, and the frontal avicularium is variously oriented. Two other Brazilian Rhynchozoon  species are distinct: R. coalitum Vieira et al., 2010  has only a suboral avicularium and lacks vicarious avicularia, while R. phrynoglossum Marcus, 1937  has 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.

Kingdom

Animalia

Phylum

Bryozoa

Class

Gymnolaemata

Order

Cheilostomatida

Family

Phidoloporidae

Genus

Rhynchozoon

Loc

Rhynchozoon aff. rostratum ( Busk, 1856 )

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

2018
Loc

Rhynchozoon rostratum:

Bastos et al. 2018

2018