Rio Pirabas (Maury coll.) (Miocene of Brazil)

Where: Para, Brazil (0.8° S, 47.1° W: paleocoordinates 0.8° S, 43.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pirabas Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• Horizontal beds of limestone near sea level. Closely associated with faunas of the Gatun, Bowden, and the Gurabo and Cercado Fm, but containing Orthaulax, which is not recorded in beds younger than the Chipola Fm of Florida, older than the above units. It is also present in the Baitoa Fm of the Dominican Republic. Maury (1924) therefore considered the fauna to be of Early Miocene age. Also shows close affinities to the Aquitanian srafe of France. Maury correlates this unit to the Chipola Fm of Florida and the Aquitanian of France. This was the lowest unit yet identified in the Neogene of Brazil.

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, shelly/skeletal, gray limestone and lithified, sideritic, shelly/skeletal, brown limestone

• No environmental data reported.
• Fossiliferous limestone exhibits two beds, a grayish or light buff bed, a leached limestone or coquina composed of broken shells loosely cemented together and later calcified, while the other is a deeper color due to infiltration of limonite. Collection is believed to be from the lighter limestone unit.

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: quarrying,

• Artificial casts of the external molds were made. Collected by F. de Carvalho for G. de Campos of the Brazil Geological Survey. Types are reposited at the Museum of the Brazil Geological Survey.

Primary reference: C. J. Maury. 1924. Fosseis Terciarios Do Brazil. Servico Geologico E Mineralogico Do Brazil Monographia 49 [A. Miller/A. Hendy/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 60979: authorized by Austin Hendy, entered by Austin Hendy on 28.05.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Fairly lengthy list, but possibly not exhaustive given the quality of the fauna. The nomenclature is antiquated, though has species-resolution assignments; identifications by Maury who had extensive knowledge of circum-Caribbean faunas.
Gymnolaemata
 Cheilostomata - Lunulitidae
 Cheilostomata - Microporidae
Bivalvia
 Ostreida - Ostreidae
"Ostrea glucumarides n. sp." = Cubitostrea glucumarides, Ostrea distans, Ostrea procyonis
"Ostrea glucumarides n. sp." = Cubitostrea glucumarides Maury 1924 oyster
Ostrea procyonis Maury 1924 oyster
 Ostreida - Pteriidae
Pteria serini n. sp. pearl oyster
 Pectinida - Plicatulidae
Plicatula flabellifera n. sp. Maury 1924 scallop
Resembles: P. marginata and P. gibbosa
 Pectinida - Anomiidae
Anomia simplex d'Orbigny 1845 jingle
 Pectinida - Pectinoidae
Spondylus pinguisculus, "Pecten indissolubilis n. sp." = Chlamys (Chlamys) indissolubilis, "Pecten callimorphus n. sp." = Chlamys (Chlamys) callimorphus, "Pecten thalerus n. sp." = Chlamys (Chlamys) thalerus, Pecten daudeleus n. sp., Pecten thaumastus n. sp., Pecten grapteus n. sp.
"Pecten indissolubilis n. sp." = Chlamys (Chlamys) indissolubilis Maury 1924 scallop
"Pecten callimorphus n. sp." = Chlamys (Chlamys) callimorphus Maury 1924 scallop
"Pecten thalerus n. sp." = Chlamys (Chlamys) thalerus Maury 1924 scallop
Pecten daudeleus n. sp. scallop
Pecten thaumastus n. sp. Maury 1924 scallop
Pecten grapteus n. sp. Maury 1924 scallop
 Arcida - Glycymerididae
Glycymeris crashleyi n. sp. Maury 1924 clam
Glycymeris eumita n. sp. Maury 1924 clam
Glycymeris linda n. sp. Maury 1924 clam
Glycymeris baumanni n. sp. Maury 1924 clam
Glycymeris naiadis n. sp. Maury 1924 clam
Resembles: G. acuticostata
 Arcida - Arcidae
"Scapharca crandalli n. sp." = Scapharca (Cunearca) crandalli Maury 1924 ark
Resembles: S. corcupidonis, S. hispaniolana, and S. riocanensis
"Scapharca melloi n. sp." = Scapharca (Cunearca) melloi Maury 1924 ark
Resembles: A. transversa, A. improcera, and A. caimitica (Dom. Rep.)
"Scapharca inaequilateralis" = Anadara (Sectiarca) inaequilateralis Maury 1917 ark
Resembles: A. gatunensis (Gatun)
"Scapharca henekeni" = Anadara (Sectiarca) henekeni Maury 1917 ark
Resembles: S. hypomela, S. lienosa, S. secticosta, and S. halidonta
Scapharca textilicostata clam
Resembles: S. henekeni
Scapharca paraensis clam
Resembles: filicata (Manzanilla, Trinidad)
Scapharca pertenuicostata n. sp. clam
Resembles: S. paraensis
Scapharca "sp. 1" Gray 1847 clam
Scapharca "sp. 2" Gray 1847 clam
Scapharca "sp. 3" Gray 1847 clam
Resembles: S. guayubinica (Dom. Rep.)
Scapharca "sp. 4" Gray 1847 clam
Resembles: S. staminata (Olig., FL), S. chiriquiensis, and S. anguillana (Ant., Olig.)
Scapharca pinguescens n. sp. Maury 1924 clam
Somewhat like Argina
Scapharca vanwinkleae n. sp. Maury 1924 clam
Resembles: S. crandalli and A. riocanensis
Scapharca crashleyi n. sp. Maury 1924 clam
Resembles: S. hispaniolana and S. riocanensis
 Carditida - Carditidae
Cardita (Carditamera) manteia n. sp. Maury 1924 clam
Resembles C. (C.) arata amd C. (C.) floridana
Venericardia philotima n. sp. Maury 1924 clam
Resembles: C. wilmotii
Venericardia isaurae n. sp. Maury 1924 clam
Venericardia perimetra n. sp. Maury 1924 clam
Resembles: V. alticostata (Claiborne)
Venericardia thaleia n. sp. Maury 1924 clam
Venericardia pseudowilmotii n. sp. Maury 1924 clam
Resembles: C. wilmotii
 Solenida - Solenidae
Solen (Solena) obliquus Spengler 1794 clam
 Cardiida - Cardiidae
"Cardium (Trachycardium) paraense" = Trachycardium, "Cardium (Trachycardium) sp." = Trachycardium, "Cardium (Laevicardium) serratum" = Laevicardium serratum, Cardium (Trachycardium) philotarium n. sp., "Cardium (Trachycardium) thalassium n. sp." = Agnocardia thalassium, "Cardium (Trachycardium) pessoae n. sp." = Agnocardia pessoae, "Cardium (Nemocardium) indistinctum" = Nemocardium, "Cardium (Fragum) proavitum" = Fragum, "Cardium (Trigoniocardium) cordeliae n. sp." = Trigoniocardia cordeliae
"Cardium (Trachycardium) paraense" = Trachycardium cockle
"Cardium (Trachycardium) sp." = Trachycardium Mörch 1853 cockle
Resembles: C. muricatum [Trachycardium]
"Cardium (Laevicardium) serratum" = Laevicardium serratum Linnaeus 1758 cockle
Cardium (Trachycardium) philotarium n. sp. Maury 1924 cockle
"Cardium (Trachycardium) thalassium n. sp." = Agnocardia thalassium Maury 1925 cockle
Resembles C. paraense
"Cardium (Trachycardium) pessoae n. sp." = Agnocardia pessoae Maury 1925 cockle
"Cardium (Nemocardium) indistinctum" = Nemocardium cockle
Resembles: C. bicolor (Mauritius)
"Cardium (Fragum) proavitum" = Fragum cockle
"Cardium (Trigoniocardium) cordeliae n. sp." = Trigoniocardia cordeliae Maury 1924 cockle
 Cardiida - Semelidae
Semele ferreirae n. sp. clam
 Cardiida - Solecurtidae
Tagelus whitei n. sp. clam
Resembles: T. gibbus
 Cardiida - Tellinidae
Tellina celetes n. sp. tellin clam
Maybe referrable to Angulus
Macoma (Psammacoma) riopirabica n. sp. Maury 1924 tellin clam
Resembles: M. holmesii (Mio., NC), and M. brevifrons (Rec.)
Florimetis sp.2 Olsson and Harbison 1953 tellin clam
Allied with: M. intastriata
 Cardiida - Chamidae
Chama eudeiela n. sp. jewel box
Chama sp. Linnaeus 1758 jewel box
Chama callipona n. sp. Maury 1924 jewel box
Resembles: C. macerophylla
Echinochama praearcinella n. sp. Maury 1924 jewel box
Resembles: E. arcinella
Echinochama pristina n. sp. Maury 1924 jewel box
Resembles: E. yaquensis (Dom. Rep.)
 Cardiida - Mactridae
Mactra defossa n. sp. clam
Possiblly in subgenus Mactrotoma
 Cardiida - Veneridae
"Dosinia (Dosinidia) brasiliensis" = Dosinia (Dosinia) delicatissima, ? Chione cordeliae n. sp., Chione (Chione) paraensis, Chione (Chione) thalassopora n. sp., Venus prototypa, "Chione (Lirophora) praepaphia n. sp." = Lirophora, "Chione (Lirophora) penthesileae n. sp." = Lirophora, "Chione (Chione) agraria" = Chione (Lirophora) agraria, Antigona (Ventricola) thalestris n. sp., Antigona (Ventricola) sanctaenoctis n. sp., "Macrocallista (Paradione) maculata" = Macrocallista maculata, "Macrocallista (Paradione) pirabica n. sp." = Pitar (Paradione), "Callocardia (Agriopoma) euglypta n. sp." = Pitar (Pitar) euglyptus, "Pitaria (Lamelliconcha) perarcana n. sp." = Lamelliconcha, "Pitaria (Lamelliconcha) baumanni n. sp." = Lamelliconcha, Callocardia recondita n. sp., Callocardia (Agriopoma) obscurata, Callocardia (Agriopoma) hartti n. sp.
"Dosinia (Dosinidia) brasiliensis" = Dosinia (Dosinia) delicatissima Brown and Pilsbry 1913 venus clam
Resembles: D. chipolana
? Chione cordeliae n. sp. venus clam
Only provisionally assigned to Chione
Chione (Chione) paraensis White 1887 venus clam
Resembles: C. cortinaria, C. cribraria, C. intapurpurea, C. pubera and C. woodwardi
Chione (Chione) thalassopora n. sp. venus clam
Much like: C. compta (Rec.)
Venus prototypa venus clam
Much like: V. campechiensis, and V. mercenaria
"Chione (Lirophora) praepaphia n. sp." = Lirophora venus clam
Resembles: C. (L.) glyptocyma, burnsii, hendersoni, and paphia
"Chione (Lirophora) penthesileae n. sp." = Lirophora venus clam
Associated with: C. (L.) praepaphia
"Chione (Chione) agraria" = Chione (Lirophora) agraria White 1887 venus clam
Antigona (Ventricola) thalestris n. sp. venus clam
Includes subspecies: A. thalestris amazoniana;resembles: A. (V.) rugatina, and A. blandiana
Antigona (Ventricola) sanctaenoctis n. sp. venus clam
Approaches: A. blandiana
"Macrocallista (Paradione) maculata" = Macrocallista maculata Linnaeus 1758 venus clam
"Macrocallista (Paradione) pirabica n. sp." = Pitar (Paradione) venus clam
"Callocardia (Agriopoma) euglypta n. sp." = Pitar (Pitar) euglyptus Maury 1925 venus clam
Affinities with: C. trigonata (Eoc., AL), and C. hatchetigbeensis, bastropensis and winnensis
"Pitaria (Lamelliconcha) perarcana n. sp." = Lamelliconcha venus clam
Resembles: P. cricinata
"Pitaria (Lamelliconcha) baumanni n. sp." = Lamelliconcha venus clam
Referred to: P. planivieta
Callocardia recondita n. sp. venus clam
Callocardia (Agriopoma) obscurata venus clam
Resembles: C. morrhuana [Pitar?]
 Pholadida - Corbulidae
Corbula delgada n. sp. clam
Resembles: C. sarda (Olig., Mio., FL)
Corbula giga n. sp. clam
Resembles: C. dominicensis
Corbula pauciornata n. sp. clam
Corbula querida n. sp. clam
[Looks like Caryocorbula]
Corbula mimosa n. sp. clam
[Also looks like Caryocorbula]
Corbula sp. Bruguière 1789 clam
 Lucinida - Lucinidae
Lucina querida n. sp., "Phacoides (Lucinisca) luciniolae n. sp." = Lucina (Lucinisca), "Phacoides (Lucinisca) fluctivagus n. sp." = Lucina (Lucinisca) fluctivaga, "Phacoides (Here) glomeramen n. sp." = Linga (Linga) glomeramen, Phacoides (Here) eudaidalus n. sp., Phacoides (Lucinisca) thalassogonus n. sp.
Lucina querida n. sp. Maury 1924 clam
Resembles: L. santarosana and L. crysostoma
"Phacoides (Lucinisca) luciniolae n. sp." = Lucina (Lucinisca) clam
Resembles: L. calhounensis (Olig., FL) and L. hoveyi
"Phacoides (Lucinisca) fluctivagus n. sp." = Lucina (Lucinisca) fluctivaga Maury 1924 clam
Resembles: L. nassula
"Phacoides (Here) glomeramen n. sp." = Linga (Linga) glomeramen Maury 1924 clam
Resembles: P. (L.) podagrinus
Phacoides (Here) eudaidalus n. sp. Maury 1924 clam
Resembles: P. (H.) glenni (Chipola)
Phacoides (Lucinisca) thalassogonus n. sp. Maury 1924 clam
Gastropoda
 Opisthobranchia - Cylichnidae
 Opisthobranchia - Retusidae
Retusa (Cylichnina) arcana n. sp. snail
Resembles: R. decapitata (Chipola)
 Opisthobranchia - Umbraculidae
Umbraculum derbyi n. sp. snail
 Heterostropha - Architectonicidae
"Solarium intraornatum" = Architectonica nobilis, "Solarium granulatum" = Architectonica nobilis
"Solarium intraornatum" = Architectonica nobilis Röding 1798 sundial
Resembles: S. quadroseriatim
"Solarium granulatum" = Architectonica nobilis Röding 1798 sundial
 Neotaenioglossa - Calyptraeidae
Crucibulum faustum slipper shell
"Calyptraea cf. aperta" = Calyptraea (Trochita) aperta Solander 1766 slipper shell
Calyptraea cf. centralis Conrad 1841 slipper shell
 Sorbeoconcha - Strombidae
"Strombus cf. gigas" = Lobatus gigas, "Strombus cf. aldrichi" = Persististrombus aldrichi
"Strombus cf. gigas" = Lobatus gigas Linnaeus 1758 true conch
"Strombus cf. aldrichi" = Persististrombus aldrichi Dall 1890 true conch
Resembles: S. bifrons (Dom. Rep., Jam.)
 Sorbeoconcha - Thersiteidae
Orthaulax brasiliensis n. sp. Maury 1925 snail
Resembles: O. gabbi (Chipola)
 Sorbeoconcha - Ficidae
"Pyrula paraensis n. sp." = Ficus paraensis
"Pyrula paraensis n. sp." = Ficus paraensis White 1887 fig shell
Resembles: P. papyratia, and P. reticulata
 Neogastropoda - Turbinellidae
Vasum cf. haitensis, "Xancus brasilianus n. sp." = Turbinella brasilianus, "Xancus sp." = Turbinella, "Xancus gratus n. sp." = Turbinella gratus
Vasum cf. haitensis Sowerby 1850 snail
"Xancus brasilianus n. sp." = Turbinella brasilianus Maury 1934 snail
Resembles: X. validus, X. wilsoni, and X. scolymus
"Xancus sp." = Turbinella Lamarck 1799 snail
Resembles: X. oboideus and X. praeovoideus
"Xancus gratus n. sp." = Turbinella gratus Maury 1934 snail
 Neogastropoda - Marginellidae
Marginella truncata margin shell
Marginella acuta margin shell
Marginella pirabica n. sp. margin shell
Resembles: M. acuta, and M. willcoxiana
Marginella paraensis n. sp. margin shell
Resembles: M. aurora (Chipola), and M. cassis (Rec.)
Marginella perlatens n. sp. margin shell
 Neogastropoda - Muricidae
"Trophon (Boreotrophon) tropica n. sp." = Boreotrophon, "Murex cf. yaquensis" = Chicoreus (Siratus) yaquensis, "Murex brevifrons" = Chicoreus (Chicoreus) brevifrons, "Murex pennae n. sp." = Murex (Haustellum) pennae, "Murex messorius" = Vokesimurex messorius, "Murex toreia n. sp." = Murex (Murex) toreia
"Trophon (Boreotrophon) tropica n. sp." = Boreotrophon murex snail
Resembles: T. lacineatus, and T. lacunellus
"Murex cf. yaquensis" = Chicoreus (Siratus) yaquensis Maury 1917 murex snail
"Murex brevifrons" = Chicoreus (Chicoreus) brevifrons Lamarck 1822 murex snail
"Murex pennae n. sp." = Murex (Haustellum) pennae Maury 1934 murex snail
Similar form to M. messorius
"Murex messorius" = Vokesimurex messorius Sowerby 1841 murex snail
"Murex toreia n. sp." = Murex (Murex) toreia Maury 1925 murex snail
 Neogastropoda - Volutidae
"Lyria calligona n. sp." = Voluta calligona, Lyria musicinoides n. sp.
"Lyria calligona n. sp." = Voluta calligona Maury 1934 volute
Lyria musicinoides n. sp. Maury 1934 volute
Resembles: L. musicina (FL)
 Neogastropoda - Harpidae
Morum harrisi n. sp. snail
Impossible to assign to either Oniscidia or Herculea
 Neogastropoda - Cancellariidae
Cancellaria hartti n. sp. snail
Resembles: C. barretti (Dom. Rep.), and C. reticulata (Rec.)
Cancellaria pirabensis n. sp. snail
Resembles: C. conradiana
Cancellaria euclethra n. sp. snail
Resembles: C. epistomifera (Dom. Rep.)
Cancellaria praeindentata n. sp. snail
Resembles: C. indentata (Rec., Pan.)
Cancellaria subtilicancellata n. sp. snail
Resembles: C. guppyi (Dom. Rep.)
 Neogastropoda - Olividae
Ancilla (Sparella) mutila olive snail
Resembles: A. ventricosa (NZ) and A. crassa (Red Sea)
Oliva paraensis n. sp. olive snail
Oliva pirabica n. sp. olive snail
Resembles: O. liodes (Chipola), O. gatunensis, O. brevispina, and O. giraudi
Olivella paraensis n. sp. olive snail
Resembles: O. muticoides, O. canaliculata
Olivella subperdita n. sp. olive snail
Resembles: O. alabamensis (Claiborne Gp)
Olivella calcis n. sp. olive snail
Resembles: O. mutica (Rec.)
 Neogastropoda - Ancillariidae
Amalda (Amalda) branneri n. sp. snail
Resembles: A. cingulata (Aust.), A. tankerville, and A. shepardi (Tampa)
 Neogastropoda - Drilliidae
"Drillia consors" = Hindsiclava consors, Drillia pirabica n. sp., Drillia crandalli n. sp.
"Drillia consors" = Hindsiclava consors Sowerby 1850 snail
Includes subspecies: D. consors pennae; resembles: D. militaris, D. alesiodata.
Drillia pirabica n. sp. snail
Resembles: D. henekeni, D. maura, and D. incrassata`
Drillia crandalli n. sp. snail
 Neogastropoda - Conidae
Conus conditorius cone shell
Resembles: C. planiceps (Chipola)
Conus whitei n. sp. cone shell
Conus longesperatus n. sp. cone shell
Conus sp. Linnaeus 1758 cone shell
 Neogastropoda - Terebridae
"Terebra clethra n. sp." = Strioterebrum clethra, Terebra denotans n. sp., Terebra peramabilis n. sp., Terebra paraensis n. sp.
"Terebra clethra n. sp." = Strioterebrum clethra Maury 1925 auger snail
Terebra denotans n. sp. auger snail
Resembles: T. wolfgangi, T. berlinerae, and T. cancellata
Terebra peramabilis n. sp. auger snail
Resembles: T. inaequalis, T. haitensis, and T. spirifera
Terebra paraensis n. sp. auger snail
Resembles: T. haitensis, T. spirifera, and T. gemmulata
 Neogastropoda - Turridae
"Surcula (Pleurofusia) camposi n. sp." = Pleurofusia, "Pleurotoma barretti" = Polystira barretti1
"Surcula (Pleurofusia) camposi n. sp." = Pleurofusia turrid
Resembles: T. (P.) servata
"Pleurotoma barretti" = Polystira barretti1 Guppy 1866 turrid
Subspecies: T. albida paraensis; in the pool of subspecies including: virgo, tellea, antillarum, haitensis, and barretti
 Neogastropoda - Melongenidae
Melongena sp. Schumacher 1817 snail
 Neogastropoda - Nassariidae
"Alectrion praetrivittata n. sp." = Nassarius (Alectrion), "Alectrion priraboca n. sp." = Nassarius (Alectrion), Fusus doris, Fusus soperi n. sp., Fusus baumanni n. sp.
"Alectrion praetrivittata n. sp." = Nassarius (Alectrion) snail
Resembles: A. trivittata (Rec.) and A. trivittatoides
"Alectrion priraboca n. sp." = Nassarius (Alectrion) snail
Fusus soperi n. sp. snail
Fusus baumanni n. sp. snail
Resembles: F. haitensis (Dom. Rep.)
 Neogastropoda - Buccinidae
Colubraria paraensis n. sp. true whelk
Resembles: C. testacea, C. lanceolata, and C. siphonata
Tritonidea amazonica n. sp. true whelk
Tritonidea arcana n. sp. true whelk
"Phos fictilis n. sp." = Antillophos fictilis Maury 1934 true whelk
Resembles: P. fasciolatus (Mio., Antilles)
Siphonalia harrisi n. sp. true whelk
 Neogastropoda - Fasciolariidae
Fasciolaria restituta n. sp. tulip snail
Resembles: F. gigantea (Rec.)
 Neogastropoda - Mitridae
Mitra senecta mitre shell
Resembles: M. henekeni, and M. longa
 Sorbeoconcha - Xenophoridae
Xenophora conchyliophora Born 1780 carrier shell
Subspecies: X. conchyliophora brasiliensis
 Sorbeoconcha - Cassidae
Phalium paraensis n. sp. Maury 1934 snail
Resembles: C. inflata, and C. granulosa
Sconsia felix n. sp. Maury 1934 snail
 Sorbeoconcha - Ranellidae
"Murex williamsi n. sp." = Monoplex williamsi, "Simpulum chlorostomoides n. sp." = Monoplex chlorostomoides, "Simpulum infelix n. sp." = Monoplex infelix
"Murex williamsi n. sp." = Monoplex williamsi Maury 1910 triton shell
"Simpulum chlorostomoides n. sp." = Monoplex chlorostomoides Maury 1924 triton shell
Resembles: S. chlorostomum (Rec.)
"Simpulum infelix n. sp." = Monoplex infelix Maury 1924 triton shell
Resembles: S. antillarum cercadicum (Dom. Rep.)
 Sorbeoconcha - Cypraeidae
Cypraea pennae White 1887 cowry
 Sorbeoconcha - Vermetidae
Serpulorbis amazoniana n. sp., Serpulorbis corticescupturata n. sp., "Vermetus (? Petaloconchus) subvarians n. sp." = Petaloconchus
Serpulorbis amazoniana n. sp. worm shell
Resembles: S. papulosa (Dom. Rep.)
"Vermetus (? Petaloconchus) subvarians n. sp." = Petaloconchus worm shell
Resembles: V. varians
 Sorbeoconcha - Naticidae
Natica eurydice White 1887 moon snail
Resembles: N. canrena
"Natica (Stigmaulax) sulcata" = Stigmaulax sulcata Born 1778 moon snail
Includes: N. (S.) sulcata paraensis and sulcata cerux
Lunatia modica moon snail
Lunatia lunulata moon snail
Amauropsis nativitatis n. sp. moon snail
 Cerithioidea - Turritellidae
Mesalia rathburni n. sp. turret shell
Turritella altiliroides n. sp. turret shell
Resembles: T. altilirata (Gatun), T, tornata (Ven.), and T. perattenuata (FL)
Turritella callizona n. sp. turret shell
Resembles: T. altiliroides
Turritella pirabica n. sp. turret shell
Turritella meunieri n. sp. turret shell
Resembles: T. banksii (Rec.)
Turritella paraensis n. sp. turret shell
Resembles: T. terebriformis (Chipola)
 Cerithioidea - Cerithiidae
"Clava williamsi n. sp." = Rhinoclavis, Cerithium pirabicum n. sp., Cerithium pachecoi n. sp., Cerithium gonzagae n. sp., Cerithium leei n. sp., Cerithium calcivelatum n. sp.
"Clava williamsi n. sp." = Rhinoclavis cerith snail
Resembles: C. plebeia (Dom. Rep.)
Cerithium pirabicum n. sp. cerith snail
Resembles: C. nodulosum (Aust., Phil.)
Cerithium pachecoi n. sp. cerith snail
Cerithium gonzagae n. sp. cerith snail
Resembles P. pirabicum
Cerithium leei n. sp. cerith snail
Cerithium calcivelatum n. sp. cerith snail
 Trochoidea - Trochidae
Calliostoma pirabicum n. sp. Maury 1924 top snail
Calliostoma (Eutrochus) decamposi n. sp. Maury 1924 top snail
Calliostoma (Eutrochus) derbyi n. sp. Maury 1924 top snail
Calliostoma cirrus White 1887 top snail
Calliostoma retectum Maury 1924 top snail
 Trochoidea - Turbinidae
Astraea sp. Röding 1798 snail
 Lepetellida - Fissurellidae
"Fissuridea immortalis" = Diodora immortalis, "Fissuridea derbyi n. sp." = Diodora derbyi
"Fissuridea immortalis" = Diodora immortalis Maury 1924 snail
"Fissuridea derbyi n. sp." = Diodora derbyi Maury 1924 snail
Resembles: F. patagonica (Rec.)