Medorippe ampla Garassino, De Angeli, Gallo & Pasini, 2004

Guinot, Danièle, 2023, A new subfamily classification of the highly diversified Dorippidae H. Milne Edwards, 1837 (Crustacea, Decapoda, Brachyura, Dorippoidea), using morphological, molecular and palaeotonlogical data, with special emphasis on its unique female reproductive system, Zoosystema 45 (9), pp. 225-372 : 360-361

Medorippe ampla Garassino, De Angeli, Gallo & Pasini, 2004

Medorippe ampla Garassino, De Angeli, Gallo & Pasini, 2004: 260 , figs 5, 6a, b. — De Angeli & Garassino 2006: 40. — De Angeli et al. 2009: 174, fig. 6; 2019: 47, 51. — Schweitzer et al. 2010: 79. — Jagt et al. 2015: 882. — Pasini et al. 2019a: 29, fig. 2B. — Van Bakel et al. 2020: fig. 10.33. — Schweitzer et al. 2021: 3.

Medorippe cf. M. ampla – Garassino et al. 2012: 27. — Sasaki 2019: 7791.

REMARKS

Medorippe ampla , described for two specimens from the Messinian (Late Miocene) of Piedmont, northern Italy (Garassino et al. 2004), was subsequently reported from the Messinian of Livorno in Tuscany (central Italy) (De Angeli et al. 2009: 174), and from the Early-Middle Messinian (Late Miocene) of the Romagna Apennines, Emilia-Romagna (Pasini et al. 2019a). The first record from the Early Pliocene of Italy is recent (Garassino et al. 2012: 27). The species, remarkably represented by a sketch in Garassino et al. (2004: fig. 5) and a photograph in De Angeli et al. (2009: 175, fig. 6), shows the characteristics of the Recent Medorippe lanata ( Figs 3C ; 22A, B ), e.g. an enlarged carapace with a lateral spine, a narrow front with two short teeth, two branchial lobes and a Y-shaped cardiac ornament, but differs in having a wider carapace, with a shorter anterolateral margin and granular ridges on the supraorbital, hepatic and branchial regions. The sharp lateral spine could also be reminiscent of Phyllodorippe armata ( Figs 3I ; 29A, B ), an extant species from West Africa, but without a Y-shaped ridge on the cardiac region and with a tripartite ridge on the branchial region. Failing to belong with certainty to the genus Medorippe , this species could be assigned to the Medorippinae n. subfam.

Figures

FIG. 3. — Carapace diversity in the nine dorippid genera: A, Dorippe Weber, 1795 (D. quadridens); B, Dorippoides Serène & Romimohtarto, 1969 (D. facchino); C, Medorippe Manning & Holthuis, 1981 (?M. crosnieri); D, Heikeopsis Ng, Guinot & Davie, 2008 (H. aff. japonica); E, Neodorippe Serène & Romimohtarto, 1969 (N. callida); F, Nobilum Serène & Romimohtarto, 1969 (N. histrio); G, Paradorippe Serène & Romimohtarto, 1969 (P. cathayana); H, Philippidorippe Chen, 1986 (P. philippinensis); I, Phyllodorippe Manning & Holthuis, 1981 (P. armata). A-G, I: modified from Sin et al. (2009: fig. 3); H, from Chen (1986: pl. 1, fig. 3). The strip, which is shown here only in Dorippoides facchino (Herbst, 1785) and Medorippe?crosnieri Chen, 1988, is in fact present in all species of dorippids.

FIG. 22. — Medorippinae n. subfam. Medorippe lanata (Linnaeus, 1767): A, ♂ 18.5 × 23.2 mm, Dahomey Coasts, ZRC 2009.0411: habitus; B, ovigerous ♀ 21.2 × 27.7 mm, Israel, ZRC 1999.0632: habitus; C-E, ♂ 18.5 × 23.2 mm, same data as A: C, anterior ventral view; D, thoracic sternum, press-button and G1; E, G1 and G2. F, ♂ 23.2 × 28.9 mm, no data, ZRC 2009.0412 (ex MNHN): thoracic sternum with pleon.

FIG. 29. — Phyllodorippinae n. subfam. Phyllodorippe armata (Miers, 1881), Guinean Trawling Survey,ZRC 2009.0413 (ex MNHN-B24202). A, ♂ 12.3 × 16.2 mm, habitus; B-D, ovigerous ♀ 11.9 × 16.6 mm. B, habitus; C, thoracic sternum and pleon; D, thoracic sternum, vulvae and spine on sternite 8.