Triphora charybdis Fernandes & Pimenta 2015
Creators: name: Fernandes, Maurício Romulo
name: Pimenta, Alexandre Dias
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Asparagales
Triphoridae
Triphora
Triphora charybdis

description: Triphora charybdis Fernandes & Pimenta, 2015
Figs 21 I–N, 24S, 77, 83, 84E
Triphora charybdis Fernandes & Pimenta, 2015: 507, fig. 7C–K.
Material examined
Holotype
BRAZIL – Rio de Janeiro • 23º10′01″ S, 41º03′13″ W; depth 107 m; MNRJ 18620 *.
Paratypes
See Fernandes & Pimenta (2015).
Other material
BRAZIL – Ceará • 1 spec.; 02º14′25″ S, 38º22′50″ W, Canopus Bank; depth 260 m; Nov. 2005; MZSP94263. – Rio Grande do Norte • 2 specs; 04º44′11′ S, 36º24′55″ W; depth 425–450 m; 7 May 2011; MNRJ 35109 * • 1 spec.; 04º44′53″ S, 36º25′27″ W; depth 102–108 m; 23 May 2011; MNRJ 35116 * • 2 specs; 04º33′17″ S, 36º56′35″ W; depth 130–160 m; 21 May 2011; MNRJ 35180 *. – Alagoas • 1 worn spec.; 10º32′07″ S, 36º05′11″ W, MARSEAL st. BN4-R1; depth 400 m; UFS. – Rio de Janeiro • 3 specs; PADCT st. 6627; MNRJ 29387 *. – São Paulo • 1 spec.; REVIZEE-Sul st. 6666; MNRJ 29379 * • 3 specs; REVIZEE-Sul st. 6653; MNRJ 60189. – Paraná • 1 spec.; REVIZEE-Sul st. 6699; MNRJ 29388 * • 3 specs; PADCT st. 6641; MZSP 133498 • 3 specs; PADCT st. 6595; MNRJ 29386 *. – Santa Catarina • 1 spec.; PADCT st. 6635; MNRJ 29380 *. – Rio Grande do Sul • 1 spec.; off Solidão; 30º42′ S, 49º03′ W; depth 182–186 m; 6 Aug. 1972; OC. Ship W. Besnard leg.; MZSP 19331.
COLOMBIA • 1 spec.; Archipiélagos Coralinos; 09º51′46″ N, 76º09′02″ W; depth 101 m; 30 Apr. 2005; A. Clavijo leg.; INV MOL6534 • 2 specs; Archipiélagos Coralinos; 09º48′04″ N, 76º11′09″ W; depth 95 m; 29 Apr. 2005; A. Clavijo leg.; INV MOL6538 • 1 spec.; Archipiélagos Coralinos; 09º47′17″ N, 76º11′56″ W; depth 98 m; 1 May 2005; A. Clavijo leg.; INV MOL6531 • 1 spec.; Archipiélagos Coralinos; 09º46′36″ N, 76º12′49″ W; depth 102 m; 29 Apr. 2005; A. Clavijo leg.; INV MOL6532.
GUYANA • 1 spec.; 08º08′00″ N, 57º52′30″ W, R/V Chain Cruise 35, station 37; depth 82–110 m; 28 Apr. 1963; MCZ 273420.
Remarks
Fernandes & Pimenta (2015) indicated that well-preserved shells of Triphora charybdis were sampled only in southeastern Brazil, and worn shells from Amapá and Santa Catarina were probably subfossil forms. Herein, the range of T. charybdis is extended based both on preserved and worn material (Fig. 77). Shells with a faint coloration are present northward up to the Guyana (Fig. 21I) and southward to Rio Grande do Sul (Fig. 84E). Small adult shells were found in Colombia (Fig. 21 K–N), and their intact conditions indicate that this species is currently present there.
Triphora charybdis may have remained unnoticed in the Caribbean because of its moderately deep habitat, i.e., the mid-low depths of the continental shelf, and similarities with other shallow-water triphorids (Fernandes & Pimenta 2015). However, if the pattern of worn vs preserved shells in the range of T. charybdis is confirmed after the availability of more material, a scenario of range retraction in northern and southern Brazil will be likely. In this case, living T. charybdis would be restricted to tropical waters of northeastern and southeastern Brazil, with the population from Colombia being increasingly diverged because of the lack of gene flow; their small adult size may be indicative of such a divergence.
Geographical records
Colombia (this study – well preserved); Guyana (this study – worn); Brazil: Amapá to Ceará (Fernandes & Pimenta 2015; this study – worn), Rio Grande do Norte to Rio de Janeiro (Fernandes & Pimenta 2015; this study – well preserved), São Paulo to Rio Grande do Sul (Fernandes & Pimenta 2015; this study – worn).
Bathymetric distribution
Depth: 80 m (Fernandes & Pimenta 2015) to 186 m (this study). Some deeper records, down to 450 m, are anomalous and probably derived from post mortem dislodgement.
Invalidation of previous record in Brazil
description: Published as part of Fernandes, Maurício Romulo & Pimenta, Alexandre Dias, 2020, Unraveling one of the ' Big Five': update of the taxonomy of Triphoridae (Gastropoda, Triphoroidea) from Brazil, pp. 1-170 in European Journal of Taxonomy 665 (665) on pages 51-53, DOI: 10.5852/ejt.2020.665, http://zenodo.org/record/3899047