Marshallora cf. modesta (C. B. Adams, 1850 )

Fernandes, Maurício Romulo, 2024, Triphoridae (Gastropoda) from Martinique sampled by the MADIBENTHOS expedition, with notes on shallow-water species from Guadeloupe, Zoosystema 46 (18), pp. 457-503 : 470

Marshallora cf. modesta (C. B. Adams, 1850)

( Fig. 2B )

Cerithium modestum C. B. Adams, 1850: 117 .

MATERIAL EXAMINED. — Guadeloupe. KARUBENTHOS 1 • 2 spm; sta. GM01; MNHN • 1 sh, 3 spm; sta. GM02; MNHN • 2 spm; sta. GM03; MNHN • 2 sh; sta. GM11; MNHN • 1 sh; sta. GM29; MNHN • 1 sh; sta. GS30; MNHN • 3 sh; sta. GD39; MNHN • 1 sh; sta. GD49; MNHN • 1 sh; sta. GD51; MNHN. — Martinique. MADIBENTHOS. ‘Sud Atlantique’ • 1 sh; sta. AM042; MNHN • 2 sh [one with hermit crab]; sta. AM043; MNHN • 1 sh; sta. AM325; MNHN. ‘Sud Caraibe’ • 1 sh; sta. AB150; MNHN. ‘Baie de Fort-de-France’ • 1 sh; sta. AM034; MNHN • 8 sh; sta. AB390; MNHN • 1 sh; sta. AB392; MNHN • 3 sh; sta. AB394; MNHN • 1 sh; sta. AD603; MNHN • 1 sh; sta. AD607; MNHN • 1 sh; sta. AD623; MNHN.

BATHYMETRIC DISTRIBUTION. — Recorded depth in Guadeloupe: 0-15 m (live specimens at 1 m). Recorded depth in Martinique: 0- 13 m. Previous recorded depth in the West Atlantic: 0-20 m ( Rosenberg 2009).

REMARKS

As abovementioned, the illustration of M. modesta from Guadeloupe by Rolán & Fernández-Garcés (2015: fig. 4L) actually refers to C. dupliniana , whereas their record of Marshallora nigrocincta (C. B. Adams, 1839) must be refused, because this species is known with certainty only from Canada and USA, based on DNA evidences and some shell features ( Fernandes et al. 2021). Accordingly, the record of M. nigrocincta from Guadeloupe and Martinique by Lamy & Pointier (2018) is rejected. The material from the French Antilles will be studied under an integrative taxonomic basis, together with new samples from the West Atlantic (unpublished data). Meanwhile, shells are herein identified as M. cf. modesta , regarding the existence of at least two Caribbean species in this complex ( Fernandes et al. 2021).

Figures

FIG. 2. — Triphoridae Gray,1847 from Martinique - cont.:A, Latitriphora albida (A. Adams,1854),MNHN,sta.AB149,4.0 mm;B, Marshallora cf. modesta (C. B. Adams, 1850), MNHN, sta. AB150, 4.3 mm; C, Metaxia excelsa Faber & Moolenbeek, 1991, MNHN, sta. AB123, 3.6 mm; D, Metaxia rugulosa (C. B. Adams, 1850), MNHN, sta. AD265, 6.3 mm; E, Metaxia taeniolata (Dall, 1889), MNHN, sta. AD261, 5.5 mm; F, Monophorus olivaceus (Dall, 1889), MNHN, sta. AS576, 9.5 mm; G, Nototriphora decorata (C. B. Adams,1850), MNHN, sta.AB390, 6.8 mm; H, Sagenotriphora osclausum (Rolán & Fernández-Garcés,1995),MNHN,sta. AS565, 3.4 mm; I, Similiphora intermedia (C. B. Adams, 1850), MNHN, sta. AD067, 5.6 mm; J, Similiphora sp., MNHN, sta. AS552, 5.1 mm. Scale bars: 1 mm.