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2026
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| author | Charbonnier, Sylvain Garassino, Alessandro Devillez, Julien Brochet, Richard |
| author_facet | Charbonnier, Sylvain Garassino, Alessandro Devillez, Julien Brochet, Richard |
| contents | <p><b><i>Eryma vocontii</i> Devillez, Charbonnier, Hyžný & Leroy, 2016</b></p><p>(Fig. 2)</p><p><i>Eryma vocontii</i> Devillez, Charbonnier, Hyžný & Leroy, 2016: 518, fig. 4a-f. — Devillez <i>et al.</i> 2017: 780. — Devillez & Charbonnier 2022: 282, fig. 13b, c.</p><p>TYPE MATERIAL.— Holotype. France • 1 specimen (carapace; adult); Rhône-Alpes Auvergne, Hautes-Alpes, Rosans; Early Cretaceous, Albian; Arnaud Clément leg.; MNHN.F.A57457.</p><p>Paratype. France • 1 specimen (P1 chela; adult); Rhône-Alpes Auvergne, Hautes-Alpes, Rosans; Early Cretaceous, Albian; Arnaud Clément leg.; MNHN.F.A57458.</p><p>EXAMINED MATERIAL. — France • 3 specimens (carapaces; adults); Grand-Est, Haute-Marne, Lac du Der, Presqu’Île de Nemours; Early Cretaceous, middle Albian, <i>Hoplites dentatus</i> zone; Richard Brochet leg.; MNHN.F.A98126, A98127, A98128.</p><p>DISCUSSION</p><p>The carapace groove pattern of the three specimens is typical of erymid lobsters: well-developed cervical, postcervical and branchiocardiac grooves, short gastro orbital groove and concavo-convex hepatic groove. Moreover, the junction between postcervical and branchiocardiac grooves at carapace midheight is diagnostic of <i>Eryma</i>. The assignation to <i>Eryma vocontii</i> is supported by: 1) the elongated “V” formed by the convergent postcervical and branchiocardiac grooves; 2) the very short ventral extension of the postcervical groove; 3) the ornamentation made of tubercles preceded by depressions; 4) with depressions deeper in branchial region; 5) the strongly inflated attachment sites of both mandibular and adductor testis muscles; and 6) the elongated, sub-rectangular outline of the attachment site of adductor testis muscles which is dorsally delimited by a narrow groove running between hepatic and branchiocardiac grooves (this last feature is typical of this species). Early Cretaceous fossils attributed to <i>Eryma</i> are very uncommon and only four species are known to date (Karasawa <i>et al.</i> 2008; Devillez <i>et al.</i> 2016, 2021; Devillez & Charbonnier 2022; Ossó <i>et al.</i> 2024). <i>E. vocontii</i> was described based on only two specimens, a crushed carapace and a first pereiopod chela, both from the type locality (Fig. 2 A-D). The three new specimens found about 360 km northward suggest a geographic distribution significantly broader than the French South-East Basin where the type locality is located (Devillez <i>et al.</i> 2016: fig. 2). These specimens are also more complete and less deformed than the holotype, with their attachment site of mandibular muscle and pterygostomial region entirely preserved. In addition, the specimen MNHN.F. A98128 (Fig. 2G) shows the basis of a strong antennal spine. This specimen also carries a fragment of an epibiontic bivalve shell fixed on its right flank, above the junction between postcervical and branchiocardiac grooves. Such an association is reported for the first time in Early Cretaceous erymid lobsters, but is well known, for instance, in mecochirid lobsters from the Aptian of the Isle of Wight, United Kingdom (see Robin <i>et al.</i> 2016).</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_20077262 |
| institution | Zenodo |
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| publishDate | 2026 |
| publisher | Zenodo |
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| spellingShingle | Eryma vocontii Devillez, Charbonnier, Hyzny & Leroy 2016 Charbonnier, Sylvain Garassino, Alessandro Devillez, Julien Brochet, Richard Biodiversity Taxonomy Animalia Arthropoda Malacostraca Decapoda Erymidae Eryma Eryma vocontii <p><b><i>Eryma vocontii</i> Devillez, Charbonnier, Hyžný & Leroy, 2016</b></p><p>(Fig. 2)</p><p><i>Eryma vocontii</i> Devillez, Charbonnier, Hyžný & Leroy, 2016: 518, fig. 4a-f. — Devillez <i>et al.</i> 2017: 780. — Devillez & Charbonnier 2022: 282, fig. 13b, c.</p><p>TYPE MATERIAL.— Holotype. France • 1 specimen (carapace; adult); Rhône-Alpes Auvergne, Hautes-Alpes, Rosans; Early Cretaceous, Albian; Arnaud Clément leg.; MNHN.F.A57457.</p><p>Paratype. France • 1 specimen (P1 chela; adult); Rhône-Alpes Auvergne, Hautes-Alpes, Rosans; Early Cretaceous, Albian; Arnaud Clément leg.; MNHN.F.A57458.</p><p>EXAMINED MATERIAL. — France • 3 specimens (carapaces; adults); Grand-Est, Haute-Marne, Lac du Der, Presqu’Île de Nemours; Early Cretaceous, middle Albian, <i>Hoplites dentatus</i> zone; Richard Brochet leg.; MNHN.F.A98126, A98127, A98128.</p><p>DISCUSSION</p><p>The carapace groove pattern of the three specimens is typical of erymid lobsters: well-developed cervical, postcervical and branchiocardiac grooves, short gastro orbital groove and concavo-convex hepatic groove. Moreover, the junction between postcervical and branchiocardiac grooves at carapace midheight is diagnostic of <i>Eryma</i>. The assignation to <i>Eryma vocontii</i> is supported by: 1) the elongated “V” formed by the convergent postcervical and branchiocardiac grooves; 2) the very short ventral extension of the postcervical groove; 3) the ornamentation made of tubercles preceded by depressions; 4) with depressions deeper in branchial region; 5) the strongly inflated attachment sites of both mandibular and adductor testis muscles; and 6) the elongated, sub-rectangular outline of the attachment site of adductor testis muscles which is dorsally delimited by a narrow groove running between hepatic and branchiocardiac grooves (this last feature is typical of this species). Early Cretaceous fossils attributed to <i>Eryma</i> are very uncommon and only four species are known to date (Karasawa <i>et al.</i> 2008; Devillez <i>et al.</i> 2016, 2021; Devillez & Charbonnier 2022; Ossó <i>et al.</i> 2024). <i>E. vocontii</i> was described based on only two specimens, a crushed carapace and a first pereiopod chela, both from the type locality (Fig. 2 A-D). The three new specimens found about 360 km northward suggest a geographic distribution significantly broader than the French South-East Basin where the type locality is located (Devillez <i>et al.</i> 2016: fig. 2). These specimens are also more complete and less deformed than the holotype, with their attachment site of mandibular muscle and pterygostomial region entirely preserved. In addition, the specimen MNHN.F. A98128 (Fig. 2G) shows the basis of a strong antennal spine. This specimen also carries a fragment of an epibiontic bivalve shell fixed on its right flank, above the junction between postcervical and branchiocardiac grooves. Such an association is reported for the first time in Early Cretaceous erymid lobsters, but is well known, for instance, in mecochirid lobsters from the Aptian of the Isle of Wight, United Kingdom (see Robin <i>et al.</i> 2016).</p> |
| title | Eryma vocontii Devillez, Charbonnier, Hyzny & Leroy 2016 |
| topic | Biodiversity Taxonomy Animalia Arthropoda Malacostraca Decapoda Erymidae Eryma Eryma vocontii |
| url | https://doi.org/10.5281/zenodo.20077262 |