Lyrodus mersinensis, Borges & Merckelbach, 2018

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 : 449-450

Lyrodus mersinensis sp. nov. Borges & Merckelbach

Fig. 3

Synonymy. Lyrodus pedicellatus Mediterranean form ( Borges et al. 2012), L. pedicellatus II ( Weigelt et al. 2016), Lyrodus pedicellatus Turkey ( Treneman et al. 2018).

Type material. Holotype: specimen with pallets ( MNHN IM-2000-33821 ); BOLD ID: WBET133 , project “Wood Boring Mollusca from Europe”, publicly available in the BOLD System; DNA voucher stored deep frozen (-80°C) at the University of Minho, Braga, Portugal . Paratypes: three specimens ( MNHN IM-2000-33822 , MNHNIM-2000- 33823 , MNHN-IM-2000-33824 ); BOLD IDs: WBET130 ; WBET134 ; WBET135 . All specimens were collected at the type locality, preserved in 96% ethanol and stored at 4°C at the Institute for Coastal Research, Helmholtz-Zentrum Geesthacht, Germany. The types are deposited at the Muséum National D´Histoire Naturelle in Paris, France .

Type locality. Mersin Bay , Mersin, Turkey (36° N 48´; 36° E 38.4´); Mediterranean Sea .

Other material examined. Morphology of the pallets of specimens obtained by Borges (2014) from Mersin, Turkey (n = 127) and Rovinj, Croatia (n = 301).

Morphological diagnosis. The morphologic characters are identical to those of Lyrodus pedicellatus (see below) according to Turner (1966; 1971).

Molecular diagnosis. COI sequences yield 32 molecular diagnostic characters between position 61 and position 658 ( Table 3 ). 28S rRNA sequences yield eight molecular characters in positions 111(T), 112(T), 450(G), 708(T), 714(C), 759(A), 1248(T), and 1262(G) ( Table 4 ). BIN BOLD: AAO8110 (n = 4), including the holotype. Intraspecific variation: 0.4%; closest neighbour species: Bankia carinata at a genetic distance of 19.3% and Lyrodus pedicellatus at a genetic distance of 19.9%.

Etymology. Named after the type locality, Mersin, south of Turkey.

Distribution. Currently known only from the type locality, but probably widespread in the Mediterranean and possibly the Black Sea ( Borges et al. 2014a).

Habitat. Marine; wood-boring organisms.

Figures

FIGURE 3. Lyrodus mersinensis sp. nov. (a, b) and selected dissected pallets of specimens of the same species used for comparison from the work by Borges (2014) (c, d). (a) body lacking the anterior end and the shell; (b) detail of pallets showing the distal portion of the blade with conical shape and periostracum characteristic of pedicellatus-like Lyrodus; (c) Mersin, Turkey; (d) Rovinj, Croatia. Scale bars 2 mm.