Hoploparia pusilla Secretan 1964

• Main Authors: Charbonnier, Sylvain, Garassino, Alessandro, Pasini, Giovanni
• Format: Text
• Language: unknown
• Published: Zenodo 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Decapoda; Nephropidae; Hoploparia; Hoploparia pusilla; Antarctic; The Antarctic; Antarctic Peninsula; Argentina; Aguirre; Antarc*
• Online Access: https://dx.doi.org/10.5281/zenodo.5465607; https://zenodo.org/record/5465607

Hoploparia pusilla Secrétan, 1964 (Fig. 17) Hoploparia pusilla Secrétan, 1964: 109-112, pl. 10, figs 3, 4. — Aguirre Urreta 1989: 519, 526. — Karasawa & Hayakawa 2000: 141. — Tshudy & Sorhannus 2003: 708, 709. — Garassino et al. 2009: 89. — Schweitzer et al. 2010: 30. HOLOTYPE. — MNHN.F. R 03904. PARATYPES. — From the “Coupe de Berere”: 2 specimens (MNHN.F. R 03905, A31657, gisement 166). Menabe region, central Morondava Basin, Tulear Province. TYPE LOCALITY. — Coupe de Berere (gisement 166), Belo-sur-Thsiribihina, Menabe region, central Morondava Basin, Tulear Province. TYPE AGE. — Early Campanian. ADDITIONAL MATERIAL EXAMINED. — 1 specimen (MNHN.F. A33390, Coupe de Berere, gisement 166). Belo-sur-Thsiribihina, Menabe region, central Morondava Basin, Tulear Province. DIAGNOSIS. — Cephalothorax with deep cervical groove starting at mid-height and joining the antennal groove; deep postcervical groove joining the well-marked hepatic groove; branchiocardiac and inferior grooves absent; gastric region with small spine; antennal region with tuberculate antennal carina; rostrum dorsally flat, flanked by two smooth lateral carinae, one strong, welldeveloped basal spine. DESCRIPTION Cephalothorax subcylindrical (CL = c. 19 mm, CH = c. 10 mm); rostrum dorsally flat with smooth margins and flanked by two smooth lateral carinae; one strong, well-developed basal spine; ocular incision shallow, delimited ventrally by the antennal spine; gastric region not delimited by the cervical groove, bearing one small spine located in the centre of the ocular incision; antennal region well demarcated by the cervical and antennal grooves, bearing a single postantennal spine aligned with the tuberculate antennal carina distally prolonged by the antennal spine; deep cervical groove starting at mid-height and joining the antennal groove; postcervical groove deep, slightly inclined, intercepting dorsal margin at an angle of c. 70°, starting in the first posterior ⅓ of the dorsal margin and clearly joining the well-marked hepatic groove; pterygostomial region strongly inflated; posterior margin slightly sinuous with a thin marginal carina; ornament uniformly finely tuberculate. Abdomen with subrectangular somites; somites 1 and 6 smaller than the others; somites 2-5 of uniform length; terga and pleurae uniformly tuberculate; pleurae with weak depression; telson subrectangular with two pairs of carinae converging distally, ornament similar to that of somites. Pereiopods fragmentary, only one propodus with carinate inner margin. DISCUSSION Upon re-examination of the Malagasy material studied by Secrétan (1964), we agree with her generic attribution and with the erection of a new species. As pointed out by Secrétan (1964) and confirmed by our new observations, H. pusilla differs from H. collignoni in having a deep postcervical groove joining an equally deep hepatic one. Moreover, there is a difference in stratigraphic age between the two species. : Published as part of Charbonnier, Sylvain, Garassino, Alessandro & Pasini, Giovanni, 2012, Revision of Mesozoic decapod crustaceans from Madagascar, pp. 313-357 in Geodiversitas 34 (2) on pages 313-357, DOI: 10.5252/g2012n2a5, http://zenodo.org/record/5380380 : {"references": ["SECRETAN S. 1964. - Les Crustaces decapodes du Jurassique superieur et du Cretace de Madagascar. Memoires du Museum national d'Histoire naturelle, Nouvelle serie, Serie C, Sciences de la Terre 14: 1 - 226.", "AGUIRRE URRETA M. B. 1989. - The Cretaceous decapod Crustacea of Argentina and the Antarctic Peninsula. Palaeontology 32 (3): 499 - 552.", "TSHUDY D. & SORHANNUS U. 2003. - Hoploparia, the best-known fossil clawed lobster (family Nephropidae), is a ' ' wastebasket' ' genus. Journal of Crustacean Biology 23 (3): 700 - 711.", "GARASSINO A., ARTAL P. & PASINI G. 2009. - New records of decapod macrurans from the Cretaceous of Catalonia and the Province of Castellon (Spain). Bulletin of the Mizunami Fossil Museum 35: 87 - 95.", "SCHWEITZER C. E, FELDMANN R. M., GARASSINO A., KARASAWA H. & SCHWEIGERT G. 2010. - Systematic list of fossil decapod crustacean species. Crustaceana Monographs 10: 1 - 222."]}