Laubierinia Richer de Forges & Ng, 2009a: 14
The generic affinities of the Indo-West Pacific species assigned to Rochinia A. Milne-Edwards, 1875 (Crustacea: Brachyura: Majoidea: Epialtidae)
Yan, Bee
Lee
Forges, Bertrand Richer De
Ng, Peter K. L.
Raffles Bulletin of Zoology
2021
2021-02-17
69
19
44
Laubierinia Richer de Forges & Ng, 2009a: 14
7PMHG
Richer de Forges & Ng, 2009
Richer de Forges & Ng
2009
[194,671,1339,1364]
Malacostraca
Epialtidae
Laubierinia
Animalia
Decapoda
7
26
Arthropoda
genus
Laubierinia Richer de Forges & Ng, 2009a: 14.
Typespecies. Rochinia carinataGriffin & Tranter, 1986, original designation by Richer de Forges & Ng (2009a). Species composition.With three species ( Table 1). Comparative material examined.See Appendix 1.
Diagnosis.Carapace rounded; covered by thick tomentum, masking swollen regions ( Richer de Forges & Ng, 2009a: figs. 6E, 10A, 11D; Fig. 5A, D). Pseudorostral spines short, stout, sharp, diverging at approximately 45° angle or less. Supraorbital eave with preorbital angle distinct, sharp; postorbital lobe cup-like, blunt anterior margin ( Richer de Forges & Ng, 2009a: figs. 6E, 9A, 10A, 11D; Fig. 5A, D). Carapace with several strong elevated swollen regions, some flattened on top; hepatic region particularly elevated; diagnostic laterally flattened plate present on lateral carapace border of branchial region, forming groove with rest of carapace ( Richer de Forges & Ng, 2009a: figs. 6E, 9A, B 10A, B, 11D; Fig. 5A, C, D, F). Antennal flagellum longer than pseudorostral spines. Basal antennal article longer than broad, outer margin slightly curved. Distal angle of buccal frame blunt, not raised. Pterygostomial region with single raised plate on outer margin ( Richer de Forges & Ng, 2009a: figs. 6F, 10C; Fig. 5B, E). Chelipeds with propodus slightly inflated, carinate margin; carpus with carinate outer margin; merus triangular in cross-section, carinate on each margin. Ambulatory legs with carinate margin on merus, carpus, porpodus; merus with blunt distal angle; P2 longest ( Richer de Forges & Ng, 2009a: figs. 6E, 10A, 11D; Fig. 5A, D). Male thoracic sternum slightly concave anteriorly; sternites 3, 4 narrow, with lateral margin constricted ( Richer de Forges & Ng, 2009a: figs. 6F, 10C; Fig. 5B, E). Male pleon triangular, telson triangular; surface of somites smooth. G1 straight, slightly bifid at distal tip ( Richer de Forges & Ng, 2009a: fig. 9C, D; Fig. 9A, B); G2 with blunt, rounded tip ( Richer de Forges & Ng, 2009a: fig. 9E, F).
Remarks. Laubieriniawas established by Richer de Forges & Ng (2009a)for two species previously placed in Rochinia: L. carinata(Griffin & Tranter, 1986)( typespecies) ( Richer de Forges & Ng, 2009a: figs. 6E, F, 9A–F, 11D), and L. nodosa( Rathbun, 1916)( Richer de Forges & Ng, 2009a: fig. 10A–C). Laubieriniacan be distinguished from Samadiniaby its more rounded carapace (vs. pyriform carapace in Samadinia), short and flattened pseudorostral spines (vs. long, slender pseudorostral spines in Samadinia); the presence of a laterally flattened branchial plate on lateral margin of carapace (vs. smooth, with granules or rounded branchial plate on lateral margin of carapace in Samadinia), and the presence of large distinct granules on the hepatic and branchial regions (vs. with hepatic and branchial spines or the lack of branchial spines in Samadinia) ( Richer de Forges & Ng, 2009a). In the present study, one species is transferred to Laubieriniaafter the examination of the type. With the transfer of L. globulifera( Wood-Mason & Alcock, 1891), new combination, three species are now recognised in this genus ( Table 1).