Stenodactylina shotoverigiganti Devillez & Charbonnier 2021, n. sp.
Creators
- 1. Muséum national d'Histoire naturelle, Paris Centre de Recherche en Paléontologie – Paris (CR 2 P, UMR 7207), Sorbonne Université, MNHN, UPMC, CNRS, 57 rue Cuvier, F- 75231 Parix cedex 05 Paris (France)
Description
Stenodactylina shotoverigiganti n. sp.
(Fig. 16 D-G)
urn:lsid:zoobank.org:act: E2B19293-97D9-41F9-AF43-4B03CA6F7E2F
Eryma cf. bedelta – Woods 1930: pl. 21, fig. 2.
TYPE MATERIAL. — Holotype NHMUK 24559.
ETYMOLOGY. — The specific epithet comes from the Latin “ gigantes ”, meaning giant, associated to the name of the type locality, Shotover. It refers to the giant of Shotover, a geoglyph, mentioned during the 17th century by Jean Aubrey, that has disappeared now.
TYPE LOCALITY. — Shotover, Oxfordshire, United Kingdom.
TYPE AGE. — Oxfordian.
DESCRIPTION
Carapace
Sub-cylindrical carapace; fusiform intercalated plate; elongated cardiac region; deep and wide cervical groove, becoming wider ventrally, slightly sinuous at its median inflexion, joined to dorsal margin and to antennal groove; deep and very wide antennal groove; short, shallow gastro-orbital groove, oblique, originating as a slight median inflexion of cervical groove; subparallel postcervical and branchiocardiac grooves, slightly curved; deep and wide postcervical groove, not joined to dorsal margin and interrupted in hepatic region; deep and wide branchiocardiac groove, becoming wider towards its junction to the hepatic groove, joined to dorsal margin, joined to the posterior extremity of the hepatic groove; wide hepatic groove, concavo-convex, joined to the cervical groove; slightly inflated ω area, ventrally delimited by a shallow depression extending between cervical and hepatic grooves; flat χ area; deep and wide inferior groove, joined to hepatic groove.
OrnamentationCarapace covered by rounded tubercles; intercalated plate with small tubercles irregularly spaced; gastric region with an oblique row of tubercles ended by an orbital spine.
DISCUSSION
Stenodactylina shotoverigiganti n. sp. is known by a unique carapace previously mentionned and figured byWoods (1930) as Eryma cf. bedelta. Careful examination of the specimen shows the absence of junction between postcervical and branchiocardiac grooves, and the interruption of the postcervical groove in hepatic region while the branchiocardiac groove is joined to the hepatic groove. This groove pattern is diagnostic of Stenodactylina. Moreover, some morphological features allow the distinction of this specimen from all other representatives of the genus for which the carapace is known. Indeed, the postcervical groove is shorter than that of S. australis, S. delphinensis (Moret, 1946), S. deslongchampsi (Van Straelen, 1925), S. granulifera, S. lagardettei, S. pseudoventrosa, and S. walkerae (Feldmann & Haggart, 2007). It is also slightly curved contrary to S. burgundiaca (Crônier & Courville, 2004), S. delphinensis, S. granulif-era, S. triglypta, and S. walkerae. Only the ω area is inflated while it is flat in some species (S. australis, S. delphinensis, S. deslongchampsi) or both ω and χ areas are inflated in some others (S. burgundiaca, S. granulifera, S. guisei (Wright, 1881), S. lagardettei). The ornamentation of the specimen is thin and only made of tubercles contrary to S. australis, S. burgundiaca, S. delphinensis, S. granulifera, S. guisei, S. lagardettei, and S. pseudoventrosa. Finally, there is an orbital row, which is absent in S. australis, S. burgundiaca, S. delphinensis, S. deslongchampsi, S. guisei, and S. triglypta. Considering all these elements, we consider this specimen as a representative of a new species of erymid lobsters: Stenodactylina shotoverigiganti n. sp.
Notes
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Linked records
Additional details
Biodiversity
- Collection code
- TYPE, MATERIAL
- Family
- Erymidae
- Genus
- Stenodactylina
- Kingdom
- Animalia
- Material sample ID
- NHMUK 24559
- Order
- Decapoda
- Phylum
- Arthropoda
- Scientific name authorship
- Devillez & Charbonnier
- Species
- shotoverigiganti
- Taxonomic status
- sp. nov.
- Taxon rank
- species
- Type status
- holotype
- Taxonomic concept label
- Stenodactylina shotoverigiganti Devillez & Charbonnier, 2021
References
- MORET L. 1946. - Eryma delphinensis nouvelle espece de Crustace Decapode du Berriasien de Noyarey (Isere). Travaux du Laboratoire de Geologie, Faculte des Sciences de Grenoble 25: 49 - 51.
- VAN STRAELEN V. 1925. - Contribution a l'etude des crustaces decapodes de la periode jurassique. Memoires de la Classe des Sciences de l'Academie royale de Belgique 7: 1 - 462.
- FELDMANN R. M. & HAGGART J. W. 2007. - A new species of lobster (Astacidea, Erymidae) from the Smithers Formation (Middle Jurassic) of British Columbia, Canada. Canadian Journal of Earth Sciences 44: 1791 - 1796. https: // doi. org / 10.1139 / e 07 - 058
- CRONIER C. & COURVILLE P. 2004. - A rich and highly endemic decapod crustacean fauna from the Middle Jurassic of north-east France. Palaeontology 47 (4): 999 - 1014. https: // doi. org / 10.1111 / j. 0031 - 0239.2004.00393. x
- WRIGHT T. 1881. - On a new Astacomorphous crustacean from the middle coral reef of Leckhampton Hill. Proceedings of the Cotteswold naturalists' Field Club 8: 56 - 59.