Gadila braziliensis
Creators: name: Simone, Luiz Ricardo L.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Scaphopoda
Gadilida
Gadilidae
Gadila
Gadila braziliensis

description: Gadila braziliensis (Henderson, 1920)   
 (Figs. 23-29, 87-94)   
 Cadulus (Platyschides) braziliensis Henderson, 1920: 124 (pl. 19, fig. 16); Turner, 1955: 316; Scarabino, 1970: 41 (pl. 1, fig. 1); 1973, 198-199 (fig. 6); 1975: 182 (pl. 58, fig. 887); 1985: 201 (pl. 73, fig. 1032); 1994: 309 (pl. 107, fig. 1520); Penna-Neme, 1974: 115; Steiner & Kabat, 2004: 570, 715.   
 Cadulus (Platyschides) brasiliensis: Rios, 1966: 7; 1970: 143; 1975: 182 (pl. 58, fig. 887) (err).   
 Platyschides braziliensis: Scarabino, 1980: 113 (pl. 1, fig. 9).   
 Gadilabraziliensis: Steiner&Kabat,2001: 445;2004: 570; Caetano, 2007: 150-153 (figs. 141-142).   
 Cadulus braziliensis: Absalão et al., 2005: 175-178 (fig. 2); 2006: 67.   
 Type: holotype and paratype USNM 96113.   
 Type locality: BRAZIL, off Rio de Janeiro, 23°08’S 41°34’W, 108 m depth (USBF).   
 Distinctive Description   
 Shell (Figs. 23-25, 29): Size about 8 mm, walls thin, color white-translucent, regularly curved; outer surface smooth, glossy. Relatively abrupt widening (tax of increase about 0.133 mm /mm of length). Wider portion weak, located approximately in anterior 1/5 of shell. Weakly dorso-ventrally compressed. Anterior aperture oblique, elliptical. Posterior aperture about half of anterior aperture, circular. Other details in above given references.   
 Main muscle system (Fig. 88): Components similar to those described for Polyschides noronhensis.   
 Foot (Figs. 87, 88): Mostly similar in features to that of preceding species. Tip clearly rounded, stubby.   
 Mantle (Figs. 87, 88): General features as described for Polyschides noronhensis.   
 Pallial cavity (Fig. 87): Characters similar to those described for Polyschides noronhensis, except in lacking transverse folds in posterior level of foot-visceral mass, pallial gland, and transverse fold located close to mantle edge.   
 Visceral mass (Figs. 88): Similar organization of preceding species.   
 Digestive system (Figs. 88-92): Mostly similar to Polyschides noronhensis characters, distinctive features following: Odontophore muscles (Figs. 28, 89-92): mj, inconspicuous; m4, pair slightly narrower (Figs. 90, 91); m6, narrower 1/8 of each odontophore cartilages thickness (Figs. 28, 91, 92). Odontophore cartilages (oc) with ventral edge with wide furrow in middle level (Fig. 92). Radular teeth (Figs. 26, 27): pair of lateral teeth with three sub-terminal cusps in median third, being that more lateral approximately twice larger than remaining (Fig. 26). Intestine slightly broader; performing 3-4 simple loops (Fig. 88: in). Anus a relative wide papilla (Fig. 87: an).   
 Genital system (Figs. 87): Features similar to those of preceding species.   
 Central nervous system (Figs. 88, 94, 95): Features similar to those described for Polyschides noronhensis. Nerve connected to each cerebral ganglion wider in vicinity of these ganglia, forming almost a ganglion.   
 Measurements (respectively antero-posterior length, dorso-ventral maximal lateral inflation in mm; finally tax of increase in mm/mm of length): MZUSP 46736: #1: 7.8 by 1.3, 0.166; #2: 7.4 by 1.1, 0.149.   
 Distribution: Rio de Janeiro, Brazil, to La Plata river, Argentina.   
 Habitat: Sandy bottoms, from 23 to 220 m depth. Content of buccal tube several foranmifer testa.   
 Material examined: Types. BRAZIL (R.V.W. Besnard). Rio de Janeiro. Angra dos Reis; 23°13’S 44°24’W, 36 m depth, MZUSP 18761, 2 specimens (R.V.W. Besnard sta. 340, 19/iii/1969). São Paulo. Ubatuba; 23°47’S 44°58’W, 47 m depth, MZUSP 46736, 11 specimens (P.I. sta. 4854, 17/xii/1985).   
 Class Bivalvia   
 Family Nuculidae   
  Genus Ennucula Iredale, 1931 (Type: Nucula obliqua Lamarck, 1819, OD)
description: Published as part of Simone, Luiz Ricardo L., 2009, Comparative morphology among representatives of main taxa of Scaphopoda and basal protobranch Bivalvia (Mollusca), pp. 405-457 in Papéis Avulsos de Zoologia 49 (32) on pages 417-418, DOI: 10.1590/S0031-10492009003200001, http://zenodo.org/record/13308426