Famelica leucospira, Abbate & V. & Lima & L. & Simone, 2022

Abbate, Daniel, V. Lima, Patricia Oristanio & L. Simone, Luiz Ricardo, 2022, The genera Famelica Bouchet & Warén, 1980 and Aliceia Dautzenberg & Fischer, 1897 (Conoidea Raphitomidae) collected by the MD 55 expedition in the Brazilian coast with descriptions of two new species, Zoosystema 44 (23), pp. 565-574 : 567

publication ID	https://doi.org/ 10.5252/zoosystema2022v44a23
publication LSID	urn:lsid:zoobank.org:pub:E4101C7F-6364-4E57-B219-223120A8A128
DOI	https://doi.org/10.5281/zenodo.7459119
persistent identifier	https://treatment.plazi.org/id/D3A93B13-5608-44EA-BAFA-D7CD98D202E2
taxon LSID	lsid:zoobank.org:act:D3A93B13-5608-44EA-BAFA-D7CD98D202E2
treatment provided by	Felipe
scientific name	Famelica leucospira
status	sp. nov.

Treatment

Famelica leucospira View in CoL n. sp.

( Figs 2 View FIG ; 3 View FIG )

urn:lsid:zoobank.org:act:D3A93B13-5608-44EA-BAFA-D7CD98D202E2

Famelica mirmidina View in CoL – Absalão et al. 2005: 35, figs 104, 116. — Figueira & Absalão 2012: 6, figs 3, 4 (non Dautzenberg & Fischer, 1896).

HOLOTYPE. — Brazil • Espírito Santo, Vitoria-Trindade Chain; St. DC70, Dredge Charcot-Picard; 18°59’S, 37°47’W; 1540-1550 m depth; MD55 ; Bouchet, Leal & Métivier col.; 26.V.1987; MNHN- IM-2000-38590 ( Fig. 2 View FIG A-C). GoogleMaps

PARATYPES. — Brazil • 2 shells ( Figs 2 View FIG D-F; 3A, E-G); Espirito Santo; off Marataízes , sta. DS05; 21°26’S, 39°56’W; 1400-1420 m depth; 09. V.1987; MNHN-IM-2000-38591 GoogleMaps • 1 shell ( Fig. 3B, C View FIG ); same data; MZSP 157441 View Materials GoogleMaps • 1 shell; off Vitoria; Vitoria-Trindade Chain; Bouchet, Leal & Métivier col.; Expedition MD55 ; sta. DC72, 18°59’S, 37°47’W; 950-1050 m depth; MNHN-IM-2000-38592 GoogleMaps • 1 shell; same data; 27. V.1987; MZSP 157439 View Materials ( Fig. 2 View FIG G-I) GoogleMaps • 1 shell; 28. V.1987; sta. CB79 ; 19°02’S, 37°48’W; 1500-1575 m depth; MNHN-IM-2000-38593 GoogleMaps • 2 shells; Rio de Janeiro; Bacia de Campos (Mapem Project); 21°08’13”S, 40°10’23”W; 902 m depth; MZSP 114454 View Materials GoogleMaps • 1 shell 21°08’27”S, 40°10’26”W; same data; 902 m depth; MZSP 114479 View Materials GoogleMaps • 6 shells; same data; sta. OPII#68 ; 12. VI.2003; 22°48’05”S, 40°06’38”W; 1972 m depth; IBUFRJ 18465 ( Fig. 3 View FIG H-K) GoogleMaps .

TYPE LOCALITY. — Brazil, Espírito Santo, Vitoria-Trindade Chain, 18°59’S, 37°47’W, 1540-1550 m.

ETYMOLOGY. — The specific name is from the Latin leuco, an adjective that refers to the white colour; and spira, including the protoconch and the teleoconch of pure white colour.

DIAGNOSIS. — Shell c. 7 mm, spire angle 35-39°. Protoconch with low carina in inferior third mostly marked by axial nodes. Whorls weakly angled in superior third; sculpture lacking, except for very weak chevrons, showing past very shallow anal notch. Canal shorter than 10% of total length. Inner lip rounded, concave, lacking folds.

DISTRIBUTION. — Brazil: Bahia to Rio de Janeiro.

HABITAT. — Muddy and sandy bottoms, bathypelagic zone, 760- 3360 m.

DESCRIPTION

Shell ( Figs 2 View FIG ; 3 View FIG )

About 7 mm, fusiform, about twice as long as wide, with c. 7 convex whorls. Colour white to cream, sometimes with light orange spots throughout shell. Protoconch ( Figs 2C, F, I View FIG ; 3C, F, G, I View FIG ) with low carina in inferior third; consisting of two parts ( Fig. 3I View FIG ): 1) first part blunt, smooth, gradually with small pustules, dome-shaped, light brown, with 1.5 whorls; transition indistinct; 2) second part c. 1.5-2 whorls, cream, sculptured by vertical ribs near inferior suture, interconnected by narrow cord in carina level ( Fig. 3C, D View FIG ). Teleoconch smooth, lacking sculpture, fragile, possessing only shallow chevrons of growth lines almost imperceptible ( Figs 2B, E, G View FIG ; 3A, E, H View FIG ). Very shallow, weak angulation between middle and superior thirds ( Figs 2A, B, G View FIG ; 3E View FIG ). Suture deep, well-marked. Spire angle 35-40°. Aperture wide, elliptical, about 1.5 as long as wide; length about 1/4 of shell length ( Figs 2A, D, G View FIG ; 3A, B, E, H, J, K View FIG ). Siphonal canal short, narrow, simple; turned forward; about 10% of total shell length ( Figs 2A, G View FIG ; 3J, K View FIG ). Anal notch shallow, located between middle and superior thirds of outer lip (checked by growth lines) ( Figs 2B View FIG ; 3J, K View FIG ). Outer lip thin, fragile, rounded, smooth without sculpture or lirae ( Figs 2G View FIG ; 3J, K View FIG ). Inner lip similar arched as outer lip, weakly angled in middle ( Fig. 2A, G View FIG ). Callus very thin, almost absent, not folded. No umbilicus.

Measurements (length × width in mm) Holotype MNHN-IM-2000-38590: 5.1 by 2.2 ( Fig. 2A, B View FIG ). paratypes MNHN-IM-2000-38591: 6.8 by 3.9 ( Fig. 2D, E View FIG ); MZSP 157439: 4.6 by 1.9 ( Fig. 2G, H View FIG ).