Calliostoma hassler Clench & Aguayo, 1939

Cavallari, Daniel C., Salvador, Rodrigo B., Dornellas, Ana P. S. & Simone, Luiz R. L., 2019, Calliostomatidae, Colloniidae, Margaritidae, and Solariellidae (Gastropoda: Trochoidea) collected by the Marion Dufresne (MD 55) expedition in southeastern Brazil, with description of a new species of Calliostoma, Zootaxa 4609 (3), pp. 401-428 : 404

publication ID

https://doi.org/ 10.11646/zootaxa.4609.3.1

publication LSID

lsid:zoobank.org:pub:F38E6655-0EC4-48E1-A002-CAC599F3556D

persistent identifier

https://treatment.plazi.org/id/4A3387DC-FFBD-FFF8-FF6D-FD329DDC934C

treatment provided by

Plazi

scientific name

Calliostoma hassler Clench & Aguayo, 1939
status

 

Calliostoma hassler Clench & Aguayo, 1939 View in CoL

( Fig. 2 View FIGURE 2 A–G)

Synonymy see Dornellas & Simone (2013). Complement:

Calliostoma hassler Clench & Aguayo, 1939: 191 View in CoL , pl. 28, fig. 3; Abbott, 1974: 46; Massemin et al., 2009: 84, pl. p83; Dornellas, 2012: 104, figs 13–15; Dornellas & Simone, 2013: 285, figs 24–25, 44, 51–53, 91–98.

Astele (Leiotrochus) hassler: Macsotay & Campos, 2001: 35 , pl. 13, figs 9–10.

Calliostoma View in CoL sp.: Longo et al., 2014: 2, fig. 4F.

Type material. Holotype: MCZ 104554 View Materials . Paratypes: MCZ 104555 View Materials , 1 View Materials sh ; MFP, 1 sh; all from type locality.

Type locality. Brazil, off Cabo Frio , 75 miles east of Rio de Janeiro, 64 m (20/ii/1872) .

Distribution. From Paria, northern Venezuela, to southeastern Brazil, live specimens from 20–100 m ( Macsotay & Campos 2001; Dornellas & Simone 2013).

Habitat. On bottoms alongside bryozoans and coralline algae ( Clench & Turner, 1960).

Material examined. Brazil: Espírito Santo: off São Mateus, Jaseur Bank, 20°27’S, 35°54’W, MD55 sta. DC34, 54 m, MNHN, 1 sh (15/v/1987); Vitoria Bank , 20°32’S, 38°10’W, MD55 sta. DC 22, 52 m, MNHN, 1 sh; Davis Bank , 20°39’S, 34°41’W, MD55 sta. DC40, 60 m, MNHN, 1 sh; Columbia Bank , 20°41’S, 32°12’W, MD55 sta. DC47, 94– 105 m, MNHN, 2 sh (19/v/1987); Dogaressa Bank, 20°54’S, 34°01’W, MD55 sta. DC42, 60 m, MNHN, 1 sh (17/v/1987); Rio de Janeiro: off Cabo de GoogleMaps São Tomé, 21°37’S, 40°18’W, MD55 sta. DC15, 37 m, MNHN, 7 sh (10/v/1987). Additional non-MD55 material GoogleMaps : Brazil: Rio de Janeiro: types .

Measurements. 7¾ whorls, H= 25.8 mm, D= 25.7 mm (largest whole specimen).

Remarks. The single well-preserved adult individual from the MD55 assemblage ( Fig. 2 View FIGURE 2 A–B) is remarkably similar to the type specimens in outline, sculpture, and coloration. In the original description, Clench & Aguayo (1939) emphasized the yellowish hue of the types owing to a probable color loss after extended exposure to preservative fluid. However, the material studied herein, as well as the specimens illustrated by Dornellas & Simone (2013), suggest otherwise: the variation in color from yellowish ( Fig. 2 View FIGURE 2 A–B) to strongly red ( Fig. 2 D View FIGURE 2 ) seems to be the normal color range of this species. Moreover, even though most specimens have a homogeneous coloration, except for some faint, darker colored axial stripes and white blotches ( Fig. 2 View FIGURE 2 D–F), some have a mixed coloration, showing a reddish-orange hue on the first whorls that becomes yellowish towards the body whorl ( Fig. 2 A View FIGURE 2 ). The protoconch ( Fig. 2 G View FIGURE 2 ), however, seems to be invariably ivory white. The record from the MD55 sta. CB77 is the deepest known so far, though it consists of an empty, fragmentary shell.

There is a large conchological overlap between C. hassler and C. jujubinum ( Gmelin, 1791) , a species known from Mexico and the Caribbean. Wide-ranging calliostomatid species are not entirely uncommon ( Clench & Turner 1960), and a possible synonymy between these two should be further analyzed. Massemin et al. (2009) reported both species occurring together in French Guyana.

MNHN

Museum National d'Histoire Naturelle

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Trochida

Family

Calliostomatidae

Genus

Calliostoma

Loc

Calliostoma hassler Clench & Aguayo, 1939

Cavallari, Daniel C., Salvador, Rodrigo B., Dornellas, Ana P. S. & Simone, Luiz R. L. 2019
2019
Loc

Calliostoma

Longo, P. A. S. & Fernandes, M. C. & Leite, F. P. P. & Passos, F. D. 2014: 2
2014
Loc

Astele (Leiotrochus) hassler: Macsotay & Campos, 2001 : 35

Macsotay, O. & Campos, R. 2001: 35
2001
Loc

Calliostoma hassler

Dornellas, A. P. S. & Simone, L. R. L. 2013: 285
Dornellas, A. P. S. 2012: 104
Massemin, D. & Lamy, D. & Pointier, J. - P. & Gergominy, O. 2009: 84
Abbott, R. T. 1974: 46
Clench, W. J. & Aguayo, C. G. 1939: 191
1939
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