Lyrodus pedicellatus ( Quatrefages, 1849 )

Borges, Luísa M. S. & Merckelbach, Lucas M., 2018, Lyrodus mersinensis sp. nov. (Bivalvia: Teredinidae) another cryptic species in the Lyrodus pedicellatus (Quatrefages, 1849) complex, Zootaxa 4442 (3), pp. 441-457 : 451-453

Lyrodus pedicellatus ( Quatrefages, 1849)

Figs. 4 , 5

Synonymy. T. dalli Moll & Roch, 1931 .

Teredo arabica Roch, 1935 (?), T. calmani Roch, 1931 (?), T. chlorotica Gould, 1870 (?), T. dagmarae Roch, 1931 (?), T. diegensis Bartsch, 1916 (?), T. franziusi Roch, 1929 (?), T. hawaiensis Dall, Bartsch & Rehder, 1938 (?), T. helleniusi Moll, 1936 (?), T. hibicola Kuronuma, 1931 (?), T. honoluluensis Edmondson, 1946 (?), T. indica Nair, 1958 (?), T. kauaiensis Dall, Bartsch & Rehder, 1938 (?), T. lamyi Roch, 1929 (?), T. linaoana Bartsch, 1927 (?), T. lomensis Roch, 1929 (?), T. madraensis Nair, 1956 (?), T. malaccana Roch, 1935 (?), T. midwayensis Edmondson, 1946 (?), T. nodosa Roch, 1929 (?), T. pertingens Iredale, 1932 (?), T. pochhammeri Moll, 1931 (?), T. robsoni Roch, 1931 (?), T. samoaensis Miller, 1924 (?), T. siamensis Bartsch, 1927 (?), T. taiwanensis Taki & Habe, 1945 (?), T. tateyamensis Kuronuma, 1931 (?), T. togoensis Roch, 1929 (?), T. townsendi Bartsch, 1922 (?), T. tristi Iredale, 1936 (?), T. yatsui Moll, 1929 (?).

Type material. The types are unkown ( Moll 1941). A neotype was selected by Moll (1941) from Quatrefages´collection in the Muséum National d´Histoire Naturelle (MNHN-IM-2000-32924) and although not marked, Turner (1966) considered it to be the neotype selected by Moll (1941) because it was the only specimen with pallets from the type locality.

Type locality. Pasajes Port , San Sebastian, Spain (43° N 19´; 1° W 54´); Atlantic Ocean.

Material examined. Pallets of the specimens barcoded by Borges et al. (2012) were compared with pallets of Lyrodus pedicellatus obtained by Borges (2014) from Portsmouth, England (n= 210); Terceira, Azores, Portugal (n= 341); and Olhão, Portugal (n= 231). In addition, they were compared with pallets of Lyrodus mersinensis sp. nov. (see details above) and with the neotype, using a high-quality micrograph provided by the Muséum National d´Histoire Naturelle, Paris, France ( Fig. 5 ).

Morphological diagnosis. Pallets non-segmented. Calcareous portion of blade composed of a single thick piece, distally conical. Distal half of the blade composed by a loose-fitted periostracum, more or less straight-sided, sometimes extending as lateral horns; distal margin concave to U-shaped. Periostracum varying from light brown to nearly black ( Turner 1971).

Molecular diagnosis. COI sequences yield 34 molecular diagnostic characters between position 19 and position 640 ( Table 5). 28S rRNA sequences yield three molecular characters in positions 463(T), 586 (T), 719(G) ( Table 6 ).

Distribution. Reported as occurring worldwide ( Turner 1966; Turgeon et al. 2009; Borges et al. 2014a).

Habitat. Marine; from the intertidal to depths down to 37m ( Turgeon et al. 2009); wood-boring organisms.

The present article is registered at ZooBank (www.zoobank.org), under the ZooBank Life Science Identifiers (LSIDs) (urn:lsid:zoobank.org:pub:8EDAD8DB-413B-495B-8879-E6D3D020F30C) to comply with the requirements of the ICZN (1999).

Figures

FIGURE 4. Lyrodus pedicellatus from Brittany, France (a, b) and selected dissected pallets of specimens of the same species used for comparison from the work by Borges (2014) (c–f). (a) full body; (b) detail of pallets showing the distal portion of the blade with conical shape; (c) pallet pair from Portsmouth, UK, outer face (left), inner face showing the distal portion of the blade with conical shape (right); (d) series of different-sized pallets from Portsmouth, UK; (e) Olhão, Portugal; (f) Azores, Portugal. All pallets have the characteristics of the morphospecies L. pedicellatus. Scale bars (a, b, d, e and f) 2 mm; (c) 1 mm.

FIGURE 5. Lyrodus pedicellatus (Quatrefages, 1849). Neotype (broken specimen from San Sebastian, Spain, the type locality) at the Muséum National d´Histoire Naturelle, Paris. View of the specimen in different positions. Left: first- ventral position; second- dorsal position; third- lateral position; fourth-lateral position. Right: view of each pallet. Photomicrograph by Manuel Caballer MNHN, project E-RECOLNAT: ANR-11-INBS-0004. Scale bar 4 mm.