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Sibogasyrinx pyramidalis (Schepman, 1913) complex. A-G. Sibogasyrinx cf. pyramidalis 1. A-C. South China Sea, MNHN-IM-2013-44605, SL 65.2 mm. D-F. Philippines, MNHN-IM-2009-13451, SL 46.8 mm. G. South China Sea, MNHN-IM-2013-44574, SL 53.9 mm. H-I. Surcula pyramidalis Schepman, 1913, holotype, ZMA.MOLL.136836, SL 45 mm (photos by K. Hasegawa, copyright Naturalis, Leiden). J-Q. Sibogasyrinx cf. pyramidalis 2, Papua New Guinea. J-L. MNHN-IM-2013-19745, SL 65.2 mm. M-O. MNHN-IM-2009-17000, SL 59.2 mm. P. MNHN-IM-2009-16973, SL 41 mm. Q. MNHN-IM-2009-16988, SL 43 mm. R-T. Sibogasyrinx archibenthalis (Powell, 1969), holotype, USNM 238773, SL 41.8 mm. All shells to same scale.
Source publication
The genus Sibogasyrinx has to date included only four species of rare deep-water Conoidea, each known from few specimens. In shell characters it strongly resembles three distantly-related genera, two of which, Comitas and Leucosyrinx, belong to a different family, the Pseudomelatomidae. A molecular phylogenetic analysis of a large amount of materia...
Contexts in source publication
Context 1
... generally variable species matched the illustration of the holotype, which was not examined. The present molecular analysis revealed that there are two molecularly distinct but morphologically cryptic species that match the description and illustrations of the holotype of S. pyramidalis (Schepman 1913: fig. 10a-b; Shuto 1970: pl. 11, figs 10-13; Fig. 3H-I herein). The second species, not discussed in Kantor et al. (2018), was collected in the Bismarck Sea and also displays significant shell variability (= PSH 1, S. cf. pyramidalis 2). The geographic ranges of these two PSHs do not include the type locality of S. pyramidalis (Timor Sea, Pulau Rote Island). There are two possible ...
Context 2
... species is known only from the holotype. In shell shape it is most similar to S. pyramidalis. The differences are most obvious when comparing specimens of the same size (e.g., Fig.3 D-F and 3R); the last whorl is lower and the canal is proportionally much shorter in S. archibenthalis, while the spiral cords on the subsutural ramp are more pronounced and are of the same strength as on the remaining part of the last whorl. The last whorl is more angular in S. archibenthalis and the shell has a higher number of teleoconch ...
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... Spiral sculpture of distinct cords on and below shoulder. Taxonomic remarks The shell outline of the new species resembles some species of Leucosyrinx (Pseu-domelatomidae), particularly Leucosyrinx verrillii, but it differs from that species in its smaller size, less numerous shoulder nodules and radular morphology (Kantor & Puillandre, 2021). Diagnosis Shell broadly fusiform, with rather short spire, thin, light greyish white. ...
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... The use of molecular data to perform integrative taxonomy is now routinely employed in the literature (e.g., Kantor & Puillandre 2021;Šobáňová & Ďuriš 2021;Vaga et al. 2021), but surprisingly rarely for sea spiders, except for the Southern Ocean and Australia (Arango et al. 2011;Dietz et al. 2015aDietz et al. , 2015bDömel et al. 2015Dömel et al. , 2017Dömel et al. , 2019Dömel et al. , 2020Soler-Membrives et al. 2017;Brenneis et al. 2020). However, this is a paramount tool to overcome the complexity of sea spider taxonomy, which enabled us to delimit additional species compared to our preparative paper (Sabroux et al. 2019b) and to discriminate several closely related species: Eurycyde kaiouti sp. ...
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... The web-based version of ABGD (https://bioinfo.mnhn.fr/abi/public/ 1 -S1/S. subula and S. clausura Kantor & Puillandre, 2021) and Leucosyrinx (squares: 1 -L1/L. jeedara n. sp., 2 -L2/ L. truwalamuka n. sp., 3 -L3/ L. sp., B -LB/L. ...
... As studying species with distribution outside Australian waters was beyond the scope of this study, the testing of 10 PSHs (i.e., those with a letter suffix) out of a total of 18 was not attempted. These PSHs and S1 also included samples whose taxonomic characterisation has been provided in previous studies (e.g., Kantor et al. 2016;Kantor et al. 2018;Kantor and Puillandre 2021). The remaining seven PSHs (A1, A2, C1, C2, L1-3) satisfied the conditions described in the methodological section for conversion to SSHs. ...
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