Medorippe margaretha (Lőrenthey in Lőrenthey & Beurlen, 1929, Lőrenthey, 1929

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 : 361

Medorippe margaretha (Lőrenthey in Lőrenthey & Beurlen, 1929 )

Dorippe margaretha Lőrenthey in Lőrenthey & Beurlen, 1929: 135, pl. 6, fig. 1a-c. — Lőrenthey 1911: 528 (nomen nudum); 1913: 326 (nomen nudum). — Glaessner 1929: 137; 1969: R492, fig. 304.8. — Müller 1978: 279, 287, pl. 13, fig. 4; 1984a: 66, pl. 34, figs 1-5. — Holthuis & Manning 1990: 7.

Medorippe Margaretha – Karasawa 2000: 811, 812, table 1.

Dorippe (Medorippe) margaretha – Müller 2006: 42.

Dorippe margaretha – Schweitzer et al. 2010: 79. — Hyžný 2016: table 1. — Sasaki 2019: 7774. — Hyžný & Dulai 2021: fig. 62.1-5.

Medorippe margaretha – Guinot et al. 2013: 187. — Jagt et al. 2015: 882. — Van Bakel et al. 2020: fig. 10.34.

Dorippe sp. aff. margaretha – Polkowsky 2014: 123, pl. 125, figs 1-4.

REMARKS

By its outline, its anterolateral spine in the figre of Lőrenthey & Beurlen (1929: pl. 6, fig. 1a), its two closely spaced triangular frontal teeth, the carapace of this species, from the Miocene of Hungary, Portugal, Germany (Upper Miocene) and Hungary (Middle Miocene), indeed resembles that of extant species Medorippe lanata . In Polkowsky’s (2014: pl. 125, figs 1-4) four good figures of several Schleswig-Holstein specimens, the cardiac region does not show the characteristic Y-shaped ridge of the extant Medorippe lanata ( Fig. 22A, B ), and the strong tripatite branchial ridge is more reminiscent of Phyllodorippe armata ( Fig. 29A, B ); but the shape of the carapace, the strong lobulation, the spaced frontal teeth, the absence of a lateral spine (possibly lost) are not typical of this genus. But most importantly, the valuable figures of the holotype and other specimens provided by Hyžný & Dulai (2021: fig. 62.1-5) show the characteristic Y-shaped ridge on the cardiac region, a small spine on the carapace lateral margin, all of which are characters in favour of belonging to Medorippe , if not, at least, to the subfamily Medorippinae n.subfam. It should be noted that a second species of Medorippe , under the name of M. crosnieri ( Fig. 23A, B, D ), with a similar facies, including the cardiac region, probably exists, but with a still questionable status (see Remarks about Medorippe crosnieri Chen, 1988 ).

Figures

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.

FIG. 23. — Medorippinae n. subfam.: A, B,?Medorippe crosnieri Chen, 1988. Mozambique Channel, MAINBAZA Expedition: A, ♂ 21.1 × 25.9 mm, CP 3132, MNHN-IU-2009-1998, with dimorphic chelipeds; B, young ♂ 12.0 × 15.0 mm, CP 3130, MNHN-IU-2009-1999, with symmetrical chelipeds. Photos courtesy of T.-Y.Chan.C, Medorippe lanata (Linnaeus,1767),♂ 23.2 × 28.9 mm,no data,ZRC 2009.0412 (ex MNHN):P2 merus with spinulated dorsal margin;D,?Medorippe crosnieri Chen, 1988, ♂ 21.1 × 25.9 mm, same data as in A (MNHN-IU-2009-1998): P2 merus with smooth dorsal margin.Photographs made by S. Soubzmaigne.