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

DOI

https://doi.org/10.5281/zenodo.5952394

persistent identifier

https://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) View in CoL

( Fig. 6D–F View FIGURE 6 )

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

Rhynchozoon rostratum: Bastos et al., 2018 View in CoL : 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. 6D View 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, E View 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. 6E View FIGURE 6 ); oral avicularium single ( Fig. 6F View 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
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