Modulus modulus (Linnaeus, 1758)

Cavallari, Daniel Caracanhas, Almeida, Sérgio Mendonça & Simone, Luiz Ricardo L., 2020, Cerithiidae, Litiopidae, Modulidae and Planaxidae (Gastropoda, Cerithioidea) collected by the Marion Dufresne MD 55 expedition in southeastern Brazil, Papéis Avulsos de Zoologia 60, pp. 1-10 : 5

Modulus modulus (Linnaeus, 1758) ( Figs. 21‑23 )

Synonymy see Abbott (1944), Leal (1991) and Simone (2001). Complement:

Modulus modulus: Matthews & Rios, 1967: 68 ; Macsotay & Campos, 2001:45; Rios,2009:106,text fig.; Rosenberg et al., 2009: 627; Strong et al., 2011: 51, fig. 1H; Longo et al., 2014: 5, fig. 5G.

Modulus carchedonius: Absalão, 1989: 2 ; Rios, 2009: 106, text fig. (non Lamarck, 1822).

Distribution: Western Atlantic, from Florida to Santa Catarina, Brazil ( Simone, 2001).

Material examined: Brazil; off Espírito Santo: Abrolhos Continental Slope , 18°56′S, 37°52′W, 85-105 m, MNHN, 2 shells, MZSP 147435 , 1 shell ( MD55 , sta. DC82 , 28/v/1987) ; 18°50′S, 37°57′W, 60 m, MNHN, 2 shells ( MD55 , sta. DC83 , 28/v/1987) .

Measurements (± standard deviation, in mm): W = 3.29 ± 0.55; H = 3.4 ± 0.43.

Remarks: Leal (1991) reported the occurrence of M.modulus inVitória,Montague,Jaseur,Davis and Dogaressa Seamounts, but did not mention the Abrolhos Slope.This species lives at intertidal and upper infratidal levels ( Abbott, 1944; Simone, 2001). The presence of samples in the given depths is possibly due to post mortem dislodging, even though there are records as deep as 105 m ( Rosenberg et al., 2009).

Figures

Figures 21-29. Modulidae and Planaxidae collected by the MD55 expedition off SE Brazil; (21-23) Modulus modulus MNHN, sta. DC83 (W 4 mm), (21) apertural, (22) apical and (23) umbilical views; (24-27) Angiola lineata, MNHN, sta. CB76 (L 3.5 mm), (24) right lateral and (25) apertural views, (26) detail of apex (scale = 0.2 mm),(27) apical view;(28-29)Fossarus orbigny,MNHN,sta.DC75 (W 2.08 mm),(28)apertural and (29) apical views.