Nacella, MYTILINA

González-Wevar, Claudio A., Hüne, Mathias, Rosenfeld, Sebastián, Nakano, Tomoyuki, Saucède, Thomas, Spencer, Hamish & Poulin, Elie, 2019, Systematic revision of Nacella (Patellogastropoda: Nacellidae) based on a complete phylogeny of the genus, with the description of a new species from the southern tip of South America, Zoological Journal of the Linnean Society 186, pp. 303-336 : 315-316

publication ID

https://doi.org/ 10.1093/zoolinnean/zly067

publication LSID

lsid:zoobank.org:pub:68738EE0-509B-4201-854C-2ABB41662357

DOI

https://doi.org/10.5281/zenodo.5718909

persistent identifier

https://treatment.plazi.org/id/C55987A1-8115-FFDD-338F-FCBB090CFE02

treatment provided by

Carolina

scientific name

Nacella
status

 

NACELLA MYTILINA View in CoL ( HELBLING, 1779)

( FIG. 6 View Figure 6 )

Patella mytilina Helbling, 1779: 104 , pl. 1, figs 5, 6; Gmelin, 1791: 3698; Strebel, 1907: 113, pl. 3, fig. 44; pl. 4, figs 49, 51, 55, 57A, 59.

Patella mytiliformis Lightfoot, 1786: 42 View in CoL .

Patella conchacea Gmelin, 1791: 3708 .

Nacella mytiloides Schumacher, 1817: 179 View in CoL .

Patella cymbularia Lamarck, 1819: 335 ; Mermod, 1950: 700, fig. 11.

Patella cymbuloides Lesson, 1830: 422 .

Patella hyalina Philippi, 1845: 59 .

Patella vitrea Philippi, 1845: 60 .

Patella cymbium Philippi, 1845: 60 .

Nacella mytilina View in CoL – Dall, 1870: 274; Rochebrune & Mabille, 1889: 97; Pilsbry, 1891: 115, pl. 50, figs 32–39; Pelseneer, 1903: 6; Smith, 1905: 336; Thiele, 1912: 234; Melvill & Standen, 1914: 114; Carcelles, 1950: Vol. 2: 52; Powell, 1951: 80; Dell, 1964: 273; Powell, 1973, 192: Vol. 3, 191, pl. 173, figs 1, 2; Castellanos & Landoni 1988: pl. IV, figs 9, 10; Ríos & Gerdes 1997: 51; Mutshke et al. 1998: 8; Ríos et al., 2007: 100; de Aranzamendi et al., 2009: 1; González-Wevar et al., 2010: 116; 2011a: 1937; 2016a: 1; 2017: 863; Rosenfeld et al., 2015: 55 View Cited Treatment ; 2016: 76.

Nacella compressa Rochebrune & Mabille, 1889: 98 View in CoL , pl. 5, fig. 9.

Nacella falklandica Preston, 1913: 221 View in CoL , pl. 4, fig. 6.

Nacella (Nacella) mytilina View in CoL – Wenz, 1938: 217, fig. 400; Carcelles & Williamson, 1951: 257; Carcelles, 1953: 164, pl. 1, fig. 11; Ramírez, 1981: 51; Valdovinos & Rüth, 2005: 499, fig. 2A.

Nacella (Patinigera) mytilina View in CoL [sic.] – Linse, 1999: 400. Nacella mytelina [sic.] Adami & Gordillo, 1999: 186.

Studied material: Tamar Island , Strait of Magellan (52°53’48.04’’ S, 73°47’15.03’’ W) GoogleMaps N = 20; Duntze Sound , Strait of Magellan (54°19’22.32’’ S, 73°48’12.11’’ W) GoogleMaps N = 20; London Island , Pacific Patagonia (54°40’00.30’’ S, 72°03’58.67’’ W) GoogleMaps N = 24; Carlos III Island, Strait of Magellan (53°38’55.41’’ S, 72°15’31.04’’ W) GoogleMaps N = 50; Port Famine , Strait of Magellan (53°36’34.07’’ S, 70°55’53.40’’ W) GoogleMaps N = 50; Carrera Point , Strait of Magellan (53°35’10.92’’ S, 70°55’24.14’’ W) GoogleMaps N = 30; Otway Sound , Strait of Magellan (52°56’13.10’’ S, 71°11’39.07’’ W) GoogleMaps N = 25; Chabunco , Strait of Magellan (52°59’14.66’’ S, 70°48’44.43’’ W) GoogleMaps N = 30; Laredo Bay , Strait of Magellan (52°56’59.14’’ S, 70°48’03.96’’ W) GoogleMaps N = 30; Possession Bay , Strait of Magellan (52°13’55.50’’ S, 69°17’50.71’’ W) GoogleMaps N = 30; Santa María Bay , Tierra del Fuego (53°19’29.86’’ S, 70°22’34.30’’ W) GoogleMaps N = 40; Caleta River , Tierra del Fuego (53°51’45.32’’ S, 7 0°1 9’5 4.1 1’’ W) N = 3 0; GoogleMaps Virginia Bay, Beagle Channel (54°54’16.95’’ S, 67°56’05.35’’ W) GoogleMaps N = 30; Puerto Williams , Beagle Channel (54°56’04.95’’ S, 67°36’48.33’’ W) GoogleMaps N = 35; Hookers Point , Falkland / Malvinas Islands (51°42’09.60’’ S, 57°46’07.49’’ W) GoogleMaps N = 40.

Shell: The shell shape and sculpture are relatively variable in the analysed individuals across the species’ distribution ( Fig. 6A–C View Figure 6 ). The species exhibits a conical morphology, oblique with a very thin and translucent shell ( Fig. 6A–F View Figure 6 ). The anterior part of the animal is laterally compressed ( Fig. 6D–F View Figure 6 ). It has a medium shell size (maximum length 90 mm) and a medium profile. The apex is situated at the anterior 10% of the shell’s length, anteriorly directed and curved toward the border. The anterior slope of the shell is concave, while the posterior and lateral ones are convex ( Fig. 6A–F View Figure 6 ). The aperture of the shell is oval to oblong. The surface of the shell has a sculpture of a few radial ribs, more obvious in the anterior zone, and concentric growth lines, which increase in thickness towards the shell margin. The margin of the shell is relatively even. The external coloration varies (pearly cream, yellow and light brown with darker tones towards the margin with a brown/red apex). The internal part of the shell is simple with white nacreous coloration.

External anatomy: The ventral area of the foot varies from dark grey to black and the epipodial fringe is highly recognizable ( Fig. 6G View Figure 6 ). The mantle fold is narrow and cream-coloured. The mantle tentacles are in alternated series of three white shorter ones and a white longer one ( Fig. 6G View Figure 6 ). Nevertheless, some individuals also exhibit a configuration of three shorter (white/black/white) and a black longer one. The cephalic tentacles are dorsally pigmented with a black line ( Fig. 6G View Figure 6 )

Radula: See Valdovinos & Rüth (2005) ( Fig. 6H View Figure 6 ).

Distribution: Magellanic province. Pacific Patagonia: from Guarello Island (50°S) to Cape Horn (56°S). Atlantic Patagonia: Tierra del Fuego to Puerto Deseado (47°S). Falkland/ Malvinas Islands ( Fig. 6I View Figure 6 ).

Habitat: Nacella mytilina is regularly found on macroalgae ( Macrocystis , Gigartina and Lessonia ; Rosenfeld et al., 2015) but in some localities individuals can also be found on inter- and subtidal rocks.

Comments: The previously recognized distribution of N. mytilina included the Magellanic province and the Kerguelen Archipelago ( Powell, 1955, 1957, 1973; Cantera & Arnaud, 1985; Troncoso et al., 2001), as well as Antarctica ( Castellanos & Landoni, 1988). Cantera & Arnaud (1985) treated N. kerguelenensis from the Kerguelen Islands as a junior synonym of N. mytilina . However, recent multi-locus molecular analyses have demonstrated that kelp-associated N. mytilina -like individuals from the Kerguelen Islands represent a particular morphotype of N. kerguelenensis , which is genetically distinct from N. mytilina ( González-Wevar et al., 2017) . At the same time, no confirmed record exists for N. mytilina in Antarctica or in peri-Antarctic islands, such as South Shetlands Islands or South Orkneys. Accordingly, the distribution of N. mytilina is restricted to southern South America and the Falkland/ Malvinas Islands. As recorded for other Patagonian marine invertebrates ( Leese et al., 2008; González-Wevar et al., 2012a, 2018), N. mytilina exhibits population-level genetic differentiation between Pacific Patagonia and the Falkland/ Malvinas Islands ( González-Wevar et al., 2016a).

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Patellida

Family

Nacellidae

Loc

Nacella

González-Wevar, Claudio A., Hüne, Mathias, Rosenfeld, Sebastián, Nakano, Tomoyuki, Saucède, Thomas, Spencer, Hamish & Poulin, Elie 2019
2019
Loc

Nacella (Patinigera) mytilina

Linse K 1999: 400
Adami ML & Gordillo S 1999: 186
1999
Loc

Nacella (Nacella) mytilina

Valdovinos C & Ruth M 2005: 499
Ramirez J 1981: 51
Carcelles AR 1953: 164
Carcelles AR & Williamson SI 1951: 257
1951
Loc

Patella cymbularia

Mermod G 1950: 700
1950
Loc

Nacella falklandica

Preston HB 1913: 221
1913
Loc

Nacella compressa

Rochebrune AT & Mabille J 1889: 98
1889
Loc

Nacella mytilina

Gonzalez-Wevar CA & Hune M & Segovia NI & Nakano T & Spencer HG & Chown S & Saucede T & Johnstone G & Mansilla A & Poulin E 2017: 863
Gonzalez-Wevar CA & Rosenfeld S & Segovia NI & Hune M & Gerard K & Ojeda J & Mansilla A & Brickle P & Diaz A & Poulin E 2016: 1
Rosenfeld S & Aldea C & Mansilla A & Marambio J & Ojeda J 2015: 55
Gonzalez-Wevar CA & Nakano T & Canete JI & Poulin E 2011: 1937
Gonzalez-Wevar CA & Nakano T & Canete JI & Poulin E 2010: 116
de Aranzamendi MC & Gardenal CN & Martin JP & Bastida R 2009: 1
Rios C & Gerdes D & Mutschke E & Montiel A 2007: 100
Rios C & Gerdes D 1997: 51
Dell, RK 1964: 273
Powell AWB 1951: 80
Melvill JC & Standen P 1914: 114
Thiele J 1912: 234
Smith EA 1905: 336
Pelseneer P 1903: 6
Pilsbry HA 1891: 115
Rochebrune AT & Mabille J 1889: 97
Dall WH 1870: 274
1870
Loc

Patella hyalina

Philippi RA 1845: 59
1845
Loc

Patella vitrea

Philippi RA 1845: 60
1845
Loc

Patella cymbium

Philippi RA 1845: 60
1845
Loc

Patella cymbuloides

Lesson RP 1830: 422
1830
Loc

Nacella mytiloides

Schumacher HFC 1817: 179
1817
Loc

Patella conchacea

Gmelin JF 1791: 3708
1791
Loc

Patella mytilina

Strebel H 1907: 113
Gmelin JF 1791: 3698
Helbling GS 1779: 104
1779
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