Ospreyella mutiara Simon & Hoffmann, 2013

Simon, Eric, Lüter, Carsten, Logan, Alan & Mottequin, Bernard, 2018, Recent thecideide brachiopods (Thecideida, Thecideoidea) from northern Sulawesi (Indonesia) with discovery of a new Thecidellina species (Thecidellinidae), Zootaxa 4526 (4), pp. 481-515 : 496

Ospreyella mutiara Simon & Hoffmann, 2013

Text-Fig. 2; Pl. 7, Figs. 3a–d, 4a–f

2013 Ospreyella mutiara: Simon & Hoffmann , pp. 412–424, text-fig. 4, pl. 3, figs. 1–8, pl. 4., figs. 1–10, pl. 5, figs. 1–5, pl. 6, figs. 1–8, pl. 7, figs. 1–6.

2016 Ospreyella mutiara: Simon et al. , p. 5.

Material. Available specimens were collected in the shipwreck from sieved sediment or attached on oyster shells and preserved in ethanol for a future DNA study. This species is quite scarce at this station and the state of preservation is not excellent. The dried material is represented by ten individuals: eight articulated shells, one dorsal valve and two ventral valves. Material preserved in ethanol represents six specimens supposed to be alive when collected and are reserved for future DNA analyses.

Description. The material collected in Lembeh corresponds completely to the diagnosis and detailed description given for this species in 2013 by Simon & Hoffmann (pp. 412–415). The material from the Strait of Lembeh is thus similar to the material that was found in Donggala in the Strait of Makassar. The only other known possible Ospreyella species could be O. palauensis Logan, 2008 .

However, the specific characters of the latter species are not observed in O. mutiara from Lembeh, which has a median depression strongly tuberculate in its anterior part, a narrow ventral surface of the thick median ramus filled with secondary material, thick ramuli as wide as ramus filled with secondary material and frilled, minor interbrachial lobes asymmetrical and subparallel. A complete comparison between O. mutiara and O. palauensis can be found in Simon and Hoffmann (2013, tab. 4, p. 423).

Ontogeny and molecular analyses. The developments of the shell and of the lophophore have been described, discussed and illustrated in detail by Simon & Hoffmann (2013, pp. 427–428, pl. 6, figs. 1–8, pl. 7, figs. 1–6). In the same paper (p. 428, text-fig. 4) results of a molecular analyze of 18S rDNA has been published for O. mutiara that confirmed the Indo-Pacific distribution for the genus and the validity of the specific status of this species.