Raoulia fortis Ng & Rahayu 2014, sp. nov.
Creators
Description
Raoulia fortis sp. nov.
(Figs. 1G, H, 5F, 6C, 20, 21, 41A)
Typhlocarcinodes piroculatus — Balss 1938: 73. (not Typhlocarcinops piroculata Rathbun, 1911)
Material examined. Holotype: male (12.0 × 9.2 mm) (MNHN), station DB 8, east Aoré I., Santo, Vanuatu, 15°34.6'S 167°13.8'E, sandy patches, 12 m, coll. SANTO Expedition, 1 September 2006.
Diagnosis. Carapace width 1.3 times length (20A). Junction between frontal and supraorbital margins appears gently curved in frontal view (Fig. 20C). Third maxilliped with merus short, about half length of ischium; ischium quadrate, 1.1 times longer than broad (Figs. 5F, 21B). Ambulatory legs short; merus of last ambulatory leg 2.8 times as long as broad (Fig. 20A). G1 distal half slender, gently curved, with few small subdistal spinules, distal part tapering (Fig. 21C–F).
Colour. In life, the carapace and pereopods of the type specimen are cream coloured, with patches of brown, and the setae reddish-brown (Fig. 41A).
Etymology. The name is derived from fortis, Latin for “strong” and “stout,” alluding to the large size of the type specimen.
Remarks. This new species differs from the congeners in having a relatively stouter G1 that is only gently curving and smaller spinules on the subdistal surfaces (Fig. 21C–F). The other species have more strongly curved G1s (Figs. 16D–G, 19H–K, 23C–F). The carapace and third maxilliped proportions of R. fortis sp. nov. and R. galea sp. nov. are similar, but the merus of the third maxilliped of R. fortis sp. nov. is more rounded, with the anterolateral margin more strongly convex (Figs. 5F, 21B) (more subovate, with the anterolateral margin only gently convex in R. galea sp. nov., Figs. 5E, 19G).
Balss’ (1938) record of Typhlocarcinodes piroculatus ” from the Gilbert Is. (= Kiribati) in the western Pacific was on the basis of a female specimen measuring 11.3 × 9.3 mm (no figure provided). It is probably also referable to the present new species, at least on the basis of geography.
Distribution. Gilbert Is. (= Kiribati) and Vanuatu; 12 m.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- MNHN
- Event date
- 2006-09-01
- Family
- Chasmocarcinidae
- Genus
- Raoulia
- Kingdom
- Animalia
- Order
- Decapoda
- Phylum
- Arthropoda
- Scientific name authorship
- Ng & Rahayu
- Species
- fortis
- Taxonomic status
- sp. nov.
- Taxon rank
- species
- Type status
- holotype
- Verbatim event date
- 2006-09-01
- Taxonomic concept label
- Raoulia fortis Ng & Rahayu, 2014
References
- Balss, H. (1938) Die Dekapoda Brachyura von Dr. Sixten Bocks Pazifik-Expedition 1917 - 1918. Goteborgs Kungliga Vetenskaps-och Vitterhets-Samhalles Handlingar, Femte Foljden, Series B, 5 (7), 1 - 85, pls. 1, 2.
- Rathbun, M. J. (1911) Marine Brachyura. In: The Percy Sladen Trust expedition to the Indian Ocean in 1905, under the leadership of Mr. J. Stanley Gardiner. Volume III. No. XI. Transactions of the Linnean Society of London, Zoology, Series 2 (Zoology), 14 (2), pp. 191 - 261, pls. 15 - 20.
- Barnard, K. H. (1955) Additions to the Fauna-list of South African Crustacea and Pycnogonida. Annals of the South African Museum, XLIII (1), 1 - 107, Figs. 1 - 53.