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16 results for “Corbulidae”
FIGURE 14 in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 14. Varicorbula philippii (E. A. Smith, 1885). A. BMNH 1967966/1, lectotype designated herein, external view of left valve from closed shell. B–D. paralectotype BMNH 1967966/2. B. internal view of left valve. C. external view of right valve. D. internal view of right valve. E–H. CMPHRM 2396. E. external view of left valve. F. internal view of left valve. G. external view of right valve. H. internal view of right valve. I–L. MZSP 22851, specimen in pre-accretion stage. I. external view of left valve. J. internal view of left valve. K. external view of right valve. L. internal view of right valve. M–N. left valve hinge of shells with different thickening. M. MZSP 22851. N. CMPHRM 2396. O. Adolph Birman Collection, dorsal view. Scale bars: A–H, O= 2mm. I–N = 1mm. Legend: c= chondrophore. cs= cardinal socket. ct= cardinal tooth; k= knob; ke= keel; ps= pallial sinus; rs= resilial socket.
FIGURE 11 in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 11. Juliacorbula aequivalvis (Philippi, 1836). A–L. CIB 1135. A–H. Specimens in pre-accretion stage. A–D. Specimen with subquadrate shell. E–H. Specimen with subretangular shell. A, E. external view of left valve. B, F. internal view of left valve. C, G. external view of right valve. D, H. internal view of right valve. I–L. hinge of shells with different thickening. I–J. hinge of left valve. K–L. hinge of right valve. Scale bars: A–H= 2 mm. I–L= 1 mm. Legends: c= chondrophore; cs= cardinal socket; ct= cardinal tooth; k= knob; rs= resilial socket.
FIGURE 9 in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 9. Caryocorbula swiftiana (C. B. Adams, 1852). A–H. Specimens in pre-accretion stage. A–D. CIB 1165. A. external view of left valve. B. internal view of left valve. C. external view of right valve. D. internal view of right valve. E–F. CIB 1162. E. external view of left valve. F. external view of right valve. G–H. CIB 1074. G. external view of left valve. H. external view of right valve. I–L. Hinge of shells with different thickening. I. CIB 1165, left valve hinge of specimen pre-accretion stage. J. CMPHRM 2396, left valve hinge of specimen in post-accretion stage. K. CIB 1165, right valve hinge of specimen in pre-accretion stage. L. CMPHRM 2396, right valve hinge of specimen in post-accretion stage. Scale bars: A–F= 2mm; G–L= 1mm. Legends: c= chondrophore. cs= cardinal socket. ct= cardinal tooth; k= knob; rs= resilial socket.
FIGURE 8 in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 8. Caryocorbula swiftiana (C. B. Adams, 1852). A–B. lectotype (Clench & Turner 1950) MCZ 186103. A. external view of complete shell from left valve. B. external view of complete shell from right valve. C–D. lectotype of Corbula barratiana C. B. Adams, 1852 (Clench & Turner 1950) MCZ 186107. C. external view of right valve. D. internal view of right valve. E. lectotype of Corbula kjoeriana C. B. Adams, 1852, (Clench & Turner 1950) MCZ 186105, external view of right valve. F. lectotype of Corbula caribaea d'Orbigny, 1853 (in 1841–1853), designated herein BMNH 1854.10.4.552/1, external view of complete shell from left valve. G–H. CIB 1057. G. external view of left valve. H. external view of right valve. I–L. CMPHRM 2313. I. external view of left valve. J. internal view of left valve. K. external view of right valve. L. internal view of right valve. M–P. CIB 1065. M. external view of left valve. N. internal view of left valve. O. external view of right valve. P. internal view of right valve. Q–S. José Carlos Tarasconi Private Collection 08/09.1994. Q. external view of left valve. R. external view of right valve. S. dorsal view. Scale bars: A–F = 3mm. G–S= 2mm. Legends: c= chondrophore. cs= cardinal socket. ct= cardinal tooth; k= knob; ke= keel lsp= lateral siphonal plate; ps= pallial sinus; rs= resilial socket. The pink color of figures I–L is the result of the dye used in the screening material.
FIGURE 10 in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 10. Juliacorbula aequivalvis (Philippi, 1836). A–D. ZMB 3270/1, lectotype designated herein. A. external view of left valve. B. internal view of left valve. C. external view of right valve. D. internal view of right valve. E–H. BMNH 1854.10.4.549/1, lectotype of Corbula cubaniana d'Orbigny, 1853 (in 1841–1853) designated herein. E. external view of left valve. F. internal view of left valve. G. external view of right valve. H. internal view of right valve. I–Q. CIB 1135. I. external view of left valve. J. internal view of left valve. K. external view of right valve. L. internal view of right valve. M–P. specimen with subtrapezoidal shell. M. external view of left valve. N. internal view of left valve. O. external view of right valve. P. internal view of right valve. Q. dorsal view. R. MCZ 186106, lectotype of Corbula knoxiana C. B Adams, 1852 (Clench & Turner 1950). Scale bars: A–R= 3mm. Legend: c= chondrophore; cs= cardinal socket; ct= cardinal tooth; k= knob; ke= keel; r= resilium; rg= radial groove; ps= pallial sinus; rs= resilial socket.
FIGURE 6 in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 6. Caryocorbula lavalleana (d'Orbigny, 1853 in 1841–1853). A–B. 1854.10.4.551/1, lectotype designated herein. A. external view of right valve. B. internal view of right valve. C–F. MZSP 84452, holotype of Corbula tarasconii Arruda et al., 2007 (original designation). C. external view of left valve from complete shell. D. internal view of left valve. E. external view of right valve. F. internal view of right valve. G–I. hinge of shells with different thickening. G. MNRJ 11150, left valve hinge of specimen in pre-accretion stage. H. MNRJ 11149, left valve hinge of specimen in pre-accretion stage. I. MZSP 84452, left valve hinge of specimen in post-accretion stage. J. MZSP 84452, dorsal view. A–B= 2mm; C–F, J = 1mm; G–H= 0.5mm. Legends: c= chondrophore. cs= cardinal socket. ct= cardinal tooth; k= knob; ke= keel; rs= resilial socket.
FIGURE 5 in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 5. Caryocorbula chittyana (C.B. Adams, 1852). A–D. MCZ 177065, lectotype (Clench & Turner 1950). A. external view of left valve. B. internal view of left valve. C. external view of right valve. D. internal view of right valve. E–L. Two specimens from MZSP 20164. E, I. external view of left valve. F, J. internal view of left valve. G, K. external view of right valve. H, L. internal view of right valve. M–P. IBUFRJ 16015, not articulated valves of specimens in pre-accretion stage. M, O. external view of left valve. N, P. external view of right valve. Q–R. hinge of shells with different thickening. Q. IBUFRJ 16015, left valve hinge of specimen in pre-accretion stage. R. MZSP 20164, left valve hinge of specimen in post-accretion stage. S–T. Two specimens from MZSP 20164, dorsal view. Scale bars. A–P, S–T =2 mm. Q–R =1 mm. Legends: c= chondrophore. cs= cardinal socket. ct= cardinal tooth; k= knob; ke= keel; lsp= lateral siphonal plate; ps= pallial sinus; pu= pustules; rs= resilial socket.
FIGURE 2. Corbula dietziana C. B. Adams, 1852. A–B in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 2. Corbula dietziana C. B. Adams, 1852. A–B. lectotype (Clench & Turner 1950) MCZ 155604. A. external view of left valve. B. external view of right valve. C–D. Corbula blandiana C. B. Adams, 1852, lectotype (Clench & Turner 1950) MCZ 177062. C. external view of left valve. D. external view of right valve. E–F. Corbula cymella Dall, 1881, holotype by monotypy USNM 64089, specimen in pre-accretion stage of C. dietziana. E. external view of right valve. F. internal view of right valve. G–J. CIB 1141. G. external view of left valve. H. internal view of left valve. I. external view of right valve. J. internal view of right valve. K–O. José Carlos Tarasconi Private Collection, shell similar to the C. blandiana. K. external view of left valve. L. internal view of left valve. M. external view of right valve. N. internal view of the right valve. O–Q. left valve hinge of shells with different thickening; note the resilium-like pit attached to lower surface of chondrophore in 2Q. O. MZUSP 22851, specimen in pre-accretion stage. P. Adolph Birman Collection. Q. CIB 1141, hinge from thicker specimen. R. Adolph Birman Collection, dorsal view. Scale bars: A–F = 5mm; G–N, P–R = 2mm; O= 1mm. Legend: c= chondrophore. cs= cardinal socket. ct= cardinal tooth; k= knob; ke= keel; p= resilial-like pit; n= nepioconch; pl= pallial line; ps= pallial sinus; r= resilium; rs= resilial socket.
FIGURE 4. Corbula tryoni Smith, 1880. A–D. lectotype designated herein BMNH 1879.10.15.165-170 in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 4. Corbula tryoni Smith, 1880. A–D. lectotype designated herein BMNH 1879.10.15.165-170/1. A. external view of left valve. B. internal view of left valve. C. external view of right valve. D. internal view of right valve. E–K. CIB 1129. E. external view of left valve. F. internal view of left valve. G. external view of right valve. H. internal view of right valve. I. external view of left valve, closed shell. J–K. left valve hinge of shells with different thickening; note the resilium-like pit attached to lower surface of chondrophore in 2K. L–M. CIB 1127 specimen in pre-accretion stage. L. external view of left valve. M. external view of right valve. N. CIB 1129, dorsal view. Scale bars: A–I, N= 2 mm; J–M = 1mm. Legend: c= chondrophore. cs= cardinal socket. ct= cardinal tooth; k= knob; ke= keel; lsp= lateral siphonal plate; n= nepioconch; p= resilial-like pit; pl= pallial line; ps= pallial sinus; rs= resilial socket.
FIGURE 1 in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 1. Schematic drawings representing the main taxonomic structures of Corbulidae. A–D. Corbula patagonica d'Orbigny, 1846 (in 1843–1847). A. external view of left valve. B. internal view of left valve. C. external view of right valve. D. internal view of right valve. E. left hinge of a very thick shell of Corbula tryoni Smith, 1880. Scale bars: A–D= 2 mm; E= 1 mm. Legend: bp= beak position; c= chondrophore; cs= cardinal socket; ct= cardinal tooth; h= height; k= knob; ke= keel; l= length; lsp= lateral siphonal plate; n= nepioconch; p= resilial-like pit; pl= pallial line; ps= pallial sinus; rs= resilial socket.
FIGURE 3. Corbula patagonica d in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 3. Corbula patagonica d'Orbigny, 1846 (in 1843–1847). A–D. lectotype (Aguirre 1994) BMNH 1854.12.4.753/1 A. external view of left valve. B. internal view of left valve. C. external view of right valve. D. internal view of right valve. E–F. Corbula uruguayensis Marshall, 1929, holotype (original designation) USNM 3684. E. external view of left valve. F. external view of right valve. G–H CIB 1209. G. external view of left valve. H. external view of right valve. I–L. CIB 1214. I. external view of left valve. J. internal view of left valve. K. external view of right valve. L. internal view of right valve. M–N. left valve hinge of shells with different thickening. M. CIB 1214. N. CIB 1209. O–R. CIB 1205, specimens in pre-accretion stage with different sizes. O. external view of left valve. P. external view of right valve. Q. external view of left valve. R. external view of right valve. S. CIB 1209, dorsal view. Scale bars: A–L, S= 5mm; M–R= 2mm. Legend: c= chondrophore. cs= cardinal socket. ct= cardinal tooth; k= knob; ke= keel; lsp= lateral siphonal plate; n= nepioconch; pl= pallial line; ps= pallial sinus; pu= pustules; re= radial elevations; rs= resilial socket.
FIGURE 13 in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 13. Tenuicorbula lyoni (Pilsbry, 1897). A–D. ANSP 70538, lectotype designated herein. A. external view of left valve. B. internal view of left valve. C. external view of right valve. D. internal view of right valve. E–J. CIB 1104. E. external view of left valve. F. internal view of left valve. G. external view of right valve. H. internal view of right valve. I. hinge of left valve. J. hinge of right valve. K. CIB 1102, dorsal view. Scale bars: A–H= 3mm; I–J= 1mm; K= 2mm. Legends: c= chondrophore; cs= cardinal socket; ct= cardinal tooth; k= knob; ke= keel; ps= pallial sinus; rs= resilial socket.
FIGURE 12 in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 12. Juliacorbula bicarinata (G. B. Sowerby I, 1833). A–C. lectotype BMNH 1966567/1 (Coan 2002). A. external view of left valve. B. internal view of left valve. C. external view of right valve. D–G. José Carlos Tarasconi Private Collection, Guarapari–SC. D. external view of left valve. E. internal view of left valve. F. external view of right valve. G. internal view of right valve. H–N Adolph Birman Private Collection, Nova Almeida–ES. H. external view of left valve. I. internal view of left valve. J. external view of right valve. K. internal view of right valve. L. dorsal view. M. hinge of left valve. N. hinge of right valve. Scale bars: A–C, H–K = 3mm; D–G, L = 2mm; M–N= 1mm. Legends: c= chondrophore; cs= cardinal socket; ct= cardinal tooth; k= knob; ke= keel; ps= pallial sinus; rs= resilial socket.
FIGURE 7. A–F in Taxonomic revision of the recent marine Corbulidae (Mollusca, Bivalvia) from Brazil
FIGURE 7. A–F. Caryocorbula luteola (Carpenter, 1864). A–B. USNM 14897, lectotype (Coan 2002). A. external view of left valve. B. external view of right valve. C–F. MORG 15899. C. external view of left valve. D. internal view of left valve. E. external view of right valve. F. internal view of right valve. G–N. Caryocorbula marmorata (Hinds, 1843). G–L. José Carlos Tarasconi Private Collection. G. external view of left valve. H. internal view of left valve. I. external view of right valve. J. internal view of right valve. K. hinge of left valve. L. dorsal view. M–N. CMPHRM 2388, specimen in pre-accretion stage. M. external view of left valve. N. external view of right valve. Scale bars: A–J, L–N= 2mm; K= 1 mm. Legend: c= chondrophore; cs= cardinal socket; ct= cardinal tooth; k= knob; ke= keel; ps= pallial sinus; rs= resilial socket.
Data from: A phylogenetic and morphologic context for the radiation of an endemic fauna in a long-lived lake: Corbulidae (Bivalvia; Myoida) in the Miocene Pebas Formation of western Amazonia
The Corbulidae are one of a handful of a primarily marine bivalve clades that exhibit a remarkable radiation, marked by increased species richness and divergent morphologies, within a long-lived lake. For corbulids, this diversification occurred within the lower to middle Miocene Pebas Formation of western Amazonia. Only one taxon associated with this radiation (Anticorbula) remains extant. We conducted a series of phylogenetic analyses to characterize diversification of Corbulidae within the Pebas Formation and relate that diversification to geologically older freshwater corbulids from the Paleocene Fort Union Formation of the northern Great Plains (United States). We used these results, as well as a quantitative examination of morphospace occupation, to infer whether Pebasian corbulids represent a true species flock, and whether the lacustrine system represented by the Pebas Formation represents a cradle of, or reservoir for, freshwater corbulid diversity. We conducted two sets of phylogenetic analyses using shell morphology characters. A genus-level data set incorporated type species of freshwater corbulid genera, any Paleocene representatives of these genera, and selected brackish and marine corbulid genera. A species-level analysis added all described freshwater corbulid taxa to the genus-level matrix. Our results were highly resolved (few most-parsimonious trees), but not particularly robust (low branch support). For the genus-level matrix, we used a taxon jackknife procedure to explore the effects of taxon sampling on tree stability and topology. Jackknife results recover a subclade of freshwater taxa (including both Anticorbula and Pachydon species and the Paleocene Ostomya sp.) in 92.4% of trees, although placement of this subclade across the ingroup varies, as do the topologic positions of other freshwater species. Freshwater and marine corbulids also are morphologically distinct from each other, a factor that likely reduced the robustness of our phylogenetic results. By combining these results with paleoecologic, stratigraphic, and morphologic data, we infer that freshwater corbulids arose once within the family, prior to the Cenozoic, with three distinct freshwater lineages present at their first appearance in the late Paleocene of North America. Within the Miocene Pebas system of South America, we reconstruct supralimital morphologic evolution within three lineages as freshwater taxa became variously adapted to the fluid, dysoxic muds characterizing lake-bottom facies representative of the Pebas lacustrine system. In addition, corbulids apparently successfully coped with high predation pressures from co-occurring shellcrushing predators. Finally, we consider that freshwater Corbulidae were primarily fluvial taxa throughout their geologic history, with a relatively ephemeral radiation within the Pebasian lake system, thus making the Pebasian system a cradle of diversity for several corbulid lineages.
Data from: A phylogenetic and morphologic context for the radiation of an endemic fauna in a long-lived lake: Corbulidae (Bivalvia; Myoida) in the Miocene Pebas Formation of western Amazonia
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