Acanthochitona ciroi Righi, 1971

Jardim, Jaime A., De Almeida, Sergio M. & De Simone, Luiz R. L., 2022, Taxonomic study on the Polyplacophora (Chitonida: Ischnochitonidae et Acanthochitonidae) collected by the Marion Dufresne (MD 55) expedition, with description of a new species, Zoosystema 44 (5), pp. 151-157 : 154-155

publication ID

https://doi.org/ 10.5252/zoosystema2022v44a5

publication LSID

urn:lsid:zoobank.org:pub:DCD9295D-1CB3-4192-9144-F54180C9815D

DOI

https://doi.org/10.5281/zenodo.6339044

persistent identifier

https://treatment.plazi.org/id/CA7D87C4-FFF6-4B1B-FC71-57936642F5E7

treatment provided by

Felipe

scientific name

Acanthochitona ciroi Righi, 1971
status

 

Acanthochitona ciroi Righi, 1971 View in CoL

( Fig. 1K-O View FIG )

Acanthochitona ciroi Righi 1971: 1350-137 View in CoL , figs 42-44. — Rios 1994: 19, fig. 26. — Dornellas & Simone 2011: 10, figs 8-9.

MARION DUFRESNE MATERIAL. — Brazil • 3 specimens, 2.2 × 1.1 mm, 2.1 × 1.0 mm, 2.3 × 1.1 mm; Espírito Santo, off Vitória; 20°55’S, 34°01’W; 60 m; continental shelf; MD55 , sta. DC 42, Bouchet, Leal & Métivier leg.; MNHN. GoogleMaps

TYPE MATERIAL ( EXAMINED OR NOT). — Holotype. Brazil • 1 specimen, 2.2 × 1.0 mm; Ceará, Off Fortaleza; 04°27’00”S, 37°04’00”W; 58 m; continental shelf; MZSP 25896 View Materials . GoogleMaps

Paratype. Brazil • 1 specimen, 3.7 × 2.0 mm; Ceará, off Fortaleza ; 02°16’S, 39°44’W; 75 m; continental shelf; MZSP 25897 View Materials GoogleMaps .

OTHER MATERIAL EXAMINED. — Brazil • 1 specimen, 6.0 × 2.1 mm; Espirito Santo, off São Matheus ; 20°30’20”S, 24°18’43”W; MZSP 134362 View Materials GoogleMaps .

TYPE LOCALITY. — Brazil; Ceará, Off Fortaleza; 4°27’00”S, 37°04’00”W.

DISTRIBUTION. — Northeastern and southeastern Brazilian coast.

DIAGNOSIS. — Shell covering about 40-45% of dorsal surface area. Valves slightly longer than wide; colour white with some valves orange, showing a white portion with random orange spots. Valve i sculptured by raised ridges on the upper quarter portion and small tegmental pustules on the apex, which increase in dimension toward the margin. Valves ii-vii sculptured as valve i, except for jugal areas, which are sculptured by similar-sized tegmental pustules on the entire surface ( Fig. 1N View FIG ). Valve viii elliptic, antemucronal area straight and sculptured as valves ii-vii; mucro median, postmucronal area straight, sculptured as valve i ( Fig. 1O View FIG ). Perinotum white with transversal orange stripes, with 16 spicule tufts; margins with hyaline spicules.

REMARK

The MD 55 specimens match the description of Acanthochitona ciroi ( Righi 1971: 135-137, figs 42-44) and are regarded conspecific. The species range is herein extended 2000 kmsouthwards from Ceará to Rio de Janeiro state (off São João da Barra municipality).

MNHN

Museum National d'Histoire Naturelle

NOT

Nottingham City Natural History Museum

Kingdom

Animalia

Phylum

Mollusca

Class

Polyplacophora

Order

Chitonida

Family

Acanthochitonidae

Genus

Acanthochitona

Loc

Acanthochitona ciroi Righi, 1971

Jardim, Jaime A., De Almeida, Sergio M. & De Simone, Luiz R. L. 2022
2022
Loc

Acanthochitona ciroi

DORNELLAS A. P. S. & SIMONE L. R. L. 2011: 10
RIOS E. C. 1994: 19
RIGHI G. 1971: 137
1971
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