Pareuthria atrata ( E. A. Smith, 1881 ) E. A. Smith, 1881

Pastorino, Guido, 2016, Revision of the genera Pareuthria Strebel, 1905, Glypteuthria Strebel, 1905 and Meteuthria Thiele, 1912 (Gastropoda: Buccinulidae) with the description of three new genera and two new species from Southwestern Atlantic waters, Zootaxa 4179 (3), pp. 301-344 : 308-312

publication ID

https://doi.org/ 10.11646/zootaxa.4179.3.1

publication LSID

lsid:zoobank.org:pub:4E28347A-B0C4-4CF5-ACA4-0E9A6EAF930F

DOI

https://doi.org/10.5281/zenodo.5662381

persistent identifier

https://treatment.plazi.org/id/BA7387AD-FF8C-3638-FF12-5B1EFBAAFE00

treatment provided by

Plazi

scientific name

Pareuthria atrata ( E. A. Smith, 1881 )
status

comb. nov.

Pareuthria atrata ( E. A. Smith, 1881) new comb.

Figures 3 View FIGURE 3 A–T, 4A–G

Fusus plumbeus Philippi. Gould, 1852: 230 View in CoL , pl. 1, figs. 281, 281a (non Philippi, 1844 ) in agreement with Cernohorsky, 1977: 109.

Fusus roseus Homb. et Jacq. in Rousseau, 1854: 107 , [1848] pl. 25, figs. 4–5, non Anton, 1839.

Euthria atrata Smith, 1881: 29 , pl. 4, fig. 5.

Fusus (Sipho) scalaris Watson, 1882: 377 View in CoL (non Lamarck, 1816: 6, pl. 425, fig. 7.)

Fusus (Neptunea) scalaris Watson, 1886: 203 View in CoL , pl. 12, fig. 5.

Trophon candidatus Mabille & Rochebrune in Rochebrune & Mabille, 1889 : H.56, pl. 2, fig. 2; Petit, 2010: 49.

Euthria rosea Hombron & Jacquinot. Rochebrune & Mabille, 1889: 59 ; Strebel, 1905: 616, pl. 21, figs. 1–4; Strebel, 1908: 28; Melvill & Standen, 1912: 355.

Euthria ringei Strebel, 1905: 619 , pl. 21, figs. 5, 5a–c.

Probuccinum scalare Thiele, 1912: 263 .

Pareuthria rosea (Hombron & Jacquinot) . Powell, 1951: 133; Carcelles & Williamson, 1951: 295; Powell, 1960: 148; Dell, 1971: 206;

Pareuthria scalaris (Watson) . Powell, 1951: 134; Powell, 1960: 148; Cernohorsky, 1977: 109.

Neptunea scalaris (Watson) . Carcelles & Williamson, 1951: 294.

Northia atrata (E. A. Smith) . Carcelles & Williamson, 1951: 294.

Paraeuthria (sic) rosea (Hombron & Jacquinot) . Fernández, 1967: 140, fig. 6; Castellanos, 1970: 100, pl. 6, 2; Castellanos & Fernández, 1976: 10, fig. 4; Castellanos, 1992: 17, pl. 1, fig. 10.

Pareuthria powelli Cernohorsky, 1977: 109 , fig. 5, new name pro Fusus roseus Hombron & Jacquinot non Anton, 1839; Pastorino, 1995: 10, pl. 2, fig. 12; Reid & Osorio, 2000: 127, fig. 4D; Zelaya in Häussermann & Försterra, 2009: 497, figs.; Forcelli, 2000: 97, fig.

Paraeuthria ringei ( Strebel, 1905) . Castellanos, 1992: 14, pl. 1, figs. 1, 2, (non pl. 4, fig. 35 = Meteuthria batialis n. sp.).

Paraeuthria michaelseni ( Strebel, 1905) . Castellanos, 1992: 16, pl. 1, fig. 3 (non Strebel, 1905).

Pareuthria powelli ( Hombron & Jacquinot, 1854) . Linse, 2002: 105, pl. 14, figs. 9.1.1–106/108.

Type material. [ Euthria atrata ] NHMUK 79.10.15–10, 6 syntypes, mostly very worn, 4 of them pagurized; one of these specimens, illustrated here in Figure 3 View FIGURE 3 A–C is designated as lectotype in order to preserve stability of nomenclature in agreement with ICZN article 74; [ Fusus scalaris ] holotype, NHMUK 1887.2.9.700; [ Fusus roseus ] 1 syntype, MNHNP 6443; [ Euthria ringei ] 2 syntypes, ZMH 3132 (ex SE6176 (153) and [ Trophon candidatus ] 1 syntype, MNHNP 1035.

Type locality. [ Euthria atrata ] Here restricted to Portland Bay , St. Andrews Sound, 10 fms. [18.2 m] depth; [ Fusus roseus ] “ détroit de Magellan ” [ Euthria ringei ] Strait de [Le] Maire and Puerto Gallegos (= Río Gallegos), 51°38'00"S, 69°13'00"W; [ Trophon candidatus ] “ Baie Orange, sud du cap Horn ” GoogleMaps , 5–120 m depth; [ Fusus scalaris ] CHALLENGER station 305a, 47°48'30"S, 70°47'W, N. W. Patagonia, 125 fms. [228.6 m] depth ( Chile) GoogleMaps .

Description. Shell medium sized, up to 22 mm in height, fusiform, of six convex whorls; protoconch ( Fig. 4 View FIGURE 4 F) of 2 ½ convex whorls, translucent, smooth, transition to teleoconch well defined; suture impressed, aperture oval, labrum expanded, sharp, with a small, curved subsutural slit; siphonal canal short; parietal callus very thin; axial ornamentation of about 10 to 12 varices, complete in all whorls but the last, where they vanish below middle whorl; some specimens, only with weak varices on the early whorls; spiral ornamentation of about 15 characteristic, regularly spaced striae per whorl, 30 on the last; periostracum absent (?); color typically pinkish, reddish or dark purple, inside creamy white; operculum ( Fig. 4 View FIGURE 4 G) brown, ovate, nucleus subterminal.

Radula ( Figs 4 View FIGURE 4 A–C) rachiglossate, very similar to P. fuscata , but the cusps of the lateral teeth are more closely spaced in P. atrata , particularly in the juvenile specimens. Linse (2002) mentioned that the radula is also shorter.

Penis ( Figs 4 View FIGURE 4 D, E) large, long, subrectangular, flat, generally similar to that of P. f u s c at a. Some minor differences are likely due to the reproductive stage and the reaction to critical point drying method.

Material examined. Argentina: 1 shell, Mar del Plata , 22 m depth, (MACN-In 16880); 2 spms., 1 shell, 40°03’S, 51°00’W, 91.5 m depth, (MACN-In 15687); 1 shell, Punta Norte , Chubut, (MACN-In 9158-5); 4 pagurized shells, 44°16’S, 65°12’W, temperature of water 14°C, 45.75 m depth, Bahia Vera , Chubut, (MACN-In 23744); 15 spms., 15 km south of Caleta Coyle , Santa Cruz, (MACN-In 1033); 19 shells, 43°18’0.04”S, 64°16’58.8”W, 45–55 m depth, Off Rawson , Chubut, ( USNM 894420 View Materials ) GoogleMaps ; 2 shells, 43°27’S, 59°32’W, 145 m depth, (MACN-In 35058); 3 shells, Cabo Blanco, Santa Cruz, (MACN-In 23625); 4 spms., Puerto Deseado , Santa Cruz, (MACN-In 17737-1); 3 shells, 51°46’S, 68°45’W, 22 m depth, (MACN-In 23856-1); 1 shell, 53°32’S, 64°57’W, 119–124 m depth, RV ELTANIN, St. 944, ( USNM 870416 View Materials ) GoogleMaps ; 2 shells, 54°04´S, 63°35´W, 247–293 m depth, RV ELTANIN, St. 369, (USNM 870180); 2 spms.,54°27’S, 66°12’W, (USNM 870319); 1 spms., 53°06’S, 67°04’W, 86 m depth, (USNM 898475); 1 spms., 54°26’30”S, 64°53’W, (MACN-In 25033); 4 pagurized, 54°26’30’S, 64°53’W, 112 m depth, (MACN-In 25030); 9 pagurized, 55°07’S, 66°33’W, 82 m depth, (MACN-In 23937); 1 shell, 55°07’S, 66°33W, 82.35 m depth, (MACN-In 23936); 3 shells, 55°07’S, 66°33’W, 82.35 m depth, (MACN-In 23935); 1 spms., Ushuaia, 36.6 m depth, (MACN-In 29656); 2 shells, Puerto Cook, Isla de los Estados , 33.4 m depth, (MACN-In 22083); 4 shells, Puerto Hoppner , Isla de los Estados , (MACN-In 22545-1); 5 spms., 52°30’S, 67°14’W, ( USNM 870540 View Materials ) GoogleMaps ; 3 shells, Observatorio Is., (MACN-In 22583); 1 spm., 53°32’S, 64°57’W, (USNM 870415)

Chile: 8 pagurized, Picton Is., 82.35 m depth, (MACN-In 23985); 4 spms., Punta Arenas , (MACN-In 13121); 4 shells, Lennox Is., 22 m depth, (MACN-In 24912); 6 spms., Punta Arenas, (MACN-In 12370); 5 spms., Punta Arenas, ( USNM 36653 View Materials ) ; 1 shell, Calbuco , (MACN-In 11613); 1 spms., 52°52’S, 75°18’W, 119–329 m depth, ( USNM 870103 View Materials ) GoogleMaps ; 53°39’24”S, 2 spms.,70°55’30”W, (USNM 898492); 1 spm., 56°06’S, 66°19’W, (USNM 870395); 2 spms., 53°39’S, 70°55’30”W, (USNM 898490).

Distribution. Off Buenos Aires province to Ushuaia, Tierra del Fuego, Malvinas and Staten Is., Argentina in the Atlantic; Southern Chile, Punta Arenas, to Calbuco (41°S) in the Pacific Ocean.

Remarks. This is a very variable species with a large geographic range. The main variations are in the size and number of axial varices. Also the spiral striae are sometimes worn, rendering an almost smooth pattern as seen on some of the syntypes.

Cernohorsky (1977) considered Fusus scalaris Watson as a synonym of his Pareuthria powelli (new name for Fusus roseus Hombron & Jacquinot, 1854 non Anton, 1838) so he proposed no substitute name for this species despite the homonym with F. scalaris Lamarck, 1816 . The type material of Watson’s species is housed at the NHMUK and is illustrated here in figures 3P– R. It was collected by the HMS CHALLENGER expedition at Station 305A (47°48'30"S, 70°47'W), which is obviously incorrect as this point lies in the center of Santa Cruz province, Argentina GoogleMaps . It could probably be 74°W instead of 70°W, which is north of Wellington Is., Golfo de Penas, Chile. The material reported by Watson presented some differences such as its white colour, which is usual in dead specimens. Nevertheless, the shell morphology falls within the variation range of P. atrata .

USNM

Smithsonian Institution, National Museum of Natural History

NHMUK

Natural History Museum, London

HMS

Embrapa Gado de Corte

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Neogastropoda

Family

Buccinidae

Genus

Pareuthria

Loc

Pareuthria atrata ( E. A. Smith, 1881 )

Pastorino, Guido 2016
2016
Loc

Trophon candidatus Mabille & Rochebrune in Rochebrune & Mabille, 1889

Petit 2010: 49
2010
Loc

Pareuthria powelli (

Linse 2002: 105
2002
Loc

Paraeuthria ringei (

Castellanos 1992: 14
1992
Loc

Paraeuthria michaelseni (

Castellanos 1992: 16
1992
Loc

Fusus plumbeus

Cernohorsky 1977: 109
1977
Loc

Pareuthria powelli

Reid 2000: 127
Forcelli 2000: 97
Pastorino 1995: 10
Cernohorsky 1977: 109
1977
Loc

Paraeuthria (sic) rosea

Castellanos 1992: 17
Castellanos 1976: 10
Castellanos 1970: 100
Fernandez 1967: 140
1967
Loc

Pareuthria rosea

Dell 1971: 206
Powell 1960: 148
Powell 1951: 133
Carcelles 1951: 295
1951
Loc

Pareuthria scalaris

Cernohorsky 1977: 109
Powell 1960: 148
Powell 1951: 134
1951
Loc

Neptunea scalaris

Carcelles 1951: 294
1951
Loc

Northia atrata

Carcelles 1951: 294
1951
Loc

Probuccinum scalare

Thiele 1912: 263
1912
Loc

Euthria ringei

Strebel 1905: 619
1905
Loc

Euthria rosea Hombron & Jacquinot. Rochebrune & Mabille, 1889 : 59

Melvill 1912: 355
Strebel 1905: 616
Rochebrune 1889: 59
1889
Loc

Fusus (Neptunea) scalaris

Watson 1886: 203
1886
Loc

Fusus (Sipho) scalaris

Watson 1882: 377
Lamarck 1816: 6
1882
Loc

Euthria atrata

Smith 1881: 29
1881
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF