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Spiralia Stock Photos and Images

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Spiralia Stock Photos and Images

Phil's octocoral worm, Alcyonosyllis phili, can reach 5 inches in length and are found on soft corals and gorgonian fans, Yap, Micronesia. Stock Photo
RM2G4X2H0–Phil's octocoral worm, Alcyonosyllis phili, can reach 5 inches in length and are found on soft corals and gorgonian fans, Yap, Micronesia.
Gastrotrich from a freshwater sample under the microscope Stock Photo
RM2JD7GJW–Gastrotrich from a freshwater sample under the microscope
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FERTILIZATION AND DEVELOPMENTAL BIOLOGY Reference: Bi,>/. Bull 191: 285-2X6. (October, 1996) 285 Modified Spiral Cleavage: The Duet Cleavage Pattern and Early Blastomere Fates in the Acoel Turbellarian Neochildia fusca Barbara C. Borer (Department of Biology. Union College, Schenectady, NY 12308), Jonathan Q. Henry], anil Mark Q. Martindale2 Spiral cleavage, which characterizes the embryos of phyla be- longing to the Spiralia, typically involves the generation of four quartets of micromeres from the four macromeres produc Stock Photo
RMRHMD9A–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FERTILIZATION AND DEVELOPMENTAL BIOLOGY Reference: Bi,>/. Bull 191: 285-2X6. (October, 1996) 285 Modified Spiral Cleavage: The Duet Cleavage Pattern and Early Blastomere Fates in the Acoel Turbellarian Neochildia fusca Barbara C. Borer (Department of Biology. Union College, Schenectady, NY 12308), Jonathan Q. Henry], anil Mark Q. Martindale2 Spiral cleavage, which characterizes the embryos of phyla be- longing to the Spiralia, typically involves the generation of four quartets of micromeres from the four macromeres produc
Gastrotrich (about 0.16mm in length) from a freshwater sample under the microscope Stock Photo
RM2J05K6G–Gastrotrich (about 0.16mm in length) from a freshwater sample under the microscope
DEVONIAN FOSSIL: Brachiopod spiralia Ammonite Trilobite Gasteropod Mollusc, 1907 Stock Photo
RFG3PEYT–DEVONIAN FOSSIL: Brachiopod spiralia Ammonite Trilobite Gasteropod Mollusc, 1907
Brachiopod, marine, animal, vintage engraved illustration of Brachiopod, animal. Stock Vector
RFEW9Y7K–Brachiopod, marine, animal, vintage engraved illustration of Brachiopod, animal.
Rotifer Stock Vector
RF2GWMPW1–Rotifer
Brachiopod, marine, animal, vintage engraved illustration of Brachiopod, animal. Stock Photo
RFC6K4DN–Brachiopod, marine, animal, vintage engraved illustration of Brachiopod, animal.
Rotifer Stock Vector
RF2GRGFMN–Rotifer
. Bulletins of American paleontology. Texas JVIississippian brachiopods: Carter 379 Interior of brachial valve with inner socket ridges that unite beneath the umbo supporting the cardinal process, which consists of a dozen or more vertical plates; socket ridges not reaching valve tloor; sockets wide; descending lamellae forming at the inner edges of the socket ridges, however, no spiralia seen; low median ridge several millimeters long present but adductor muscle scars indistinct. Holotype.—VSNM 154823. Distinguishing characters.—This species is characterized by its subquadrate transversely el Stock Photo
RMRG9F81–. Bulletins of American paleontology. Texas JVIississippian brachiopods: Carter 379 Interior of brachial valve with inner socket ridges that unite beneath the umbo supporting the cardinal process, which consists of a dozen or more vertical plates; socket ridges not reaching valve tloor; sockets wide; descending lamellae forming at the inner edges of the socket ridges, however, no spiralia seen; low median ridge several millimeters long present but adductor muscle scars indistinct. Holotype.—VSNM 154823. Distinguishing characters.—This species is characterized by its subquadrate transversely el
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 194 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS Reference: Biol Bull. 189: 194-195. (October/November. 1995) Axial Specification in a Basal Member of the Spiralian Clade: Lineage Relationships of the First Four Cells to the Larval Body Plan in the Polyclad Turbellarian Hoploplana inquilina Jonathan Q. Henry, Mark Q. Martindale, and Barbara C. Bayer (Department of Biology, Union College, Schenectady, New York 12308) The Spiralia comprises several invertebrate phyla including the molluscs, annelids, nemerteans. sipunculid Stock Photo
RMRHMAG4–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 194 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS Reference: Biol Bull. 189: 194-195. (October/November. 1995) Axial Specification in a Basal Member of the Spiralian Clade: Lineage Relationships of the First Four Cells to the Larval Body Plan in the Polyclad Turbellarian Hoploplana inquilina Jonathan Q. Henry, Mark Q. Martindale, and Barbara C. Bayer (Department of Biology, Union College, Schenectady, New York 12308) The Spiralia comprises several invertebrate phyla including the molluscs, annelids, nemerteans. sipunculid
. Bulletins of American paleontology. Texas Mississippian brachiopods: Carter 369. Text-figure 29.—Transerse serial sections of Amesoplcura no-vamcxicana (Miller) from Apache Hill, 1 mile north of Lake Valley, New Mexico. (A) Large specimen, USNM 154795, X2, showing mature internal structures. (B) Juvenile specimen, USNM 154796, X4, showing a solid mass of shell tissue sup- porting the cardinalia, and short dental plates. mentioned mass of shell tissue; muscle scars not distinguishable in section; spiralia not preserved in material sectioned. Types.—S. A. Miller's types are apparently lost. W Stock Photo
RMRG9FA1–. Bulletins of American paleontology. Texas Mississippian brachiopods: Carter 369. Text-figure 29.—Transerse serial sections of Amesoplcura no-vamcxicana (Miller) from Apache Hill, 1 mile north of Lake Valley, New Mexico. (A) Large specimen, USNM 154795, X2, showing mature internal structures. (B) Juvenile specimen, USNM 154796, X4, showing a solid mass of shell tissue sup- porting the cardinalia, and short dental plates. mentioned mass of shell tissue; muscle scars not distinguishable in section; spiralia not preserved in material sectioned. Types.—S. A. Miller's types are apparently lost. W
. Bulletins of American paleontology. 360 Bulletin 238. 1.5 1.6 Text-figure 27.—Transverse serial sections of Tylothyris brevauriia, n. sp. X3, USNM 154821 from USNM locality 9045, measurements (mm) from ventral beak. imbedded on their inner edges in fibrous shell tissue; short low median ridge present in dorsal umbo; spiralia unknown. Holotype.—USNM No. 154813, Plate 35, figs. 2a-e. Distinguisking characters.—This species is characterized by its small size, subquadrate to semielliptical outline, small subangular attenuated ears, four or rarely five costae per ventral flank, and prominent boun Stock Photo
RMRG9FAH–. Bulletins of American paleontology. 360 Bulletin 238. 1.5 1.6 Text-figure 27.—Transverse serial sections of Tylothyris brevauriia, n. sp. X3, USNM 154821 from USNM locality 9045, measurements (mm) from ventral beak. imbedded on their inner edges in fibrous shell tissue; short low median ridge present in dorsal umbo; spiralia unknown. Holotype.—USNM No. 154813, Plate 35, figs. 2a-e. Distinguisking characters.—This species is characterized by its small size, subquadrate to semielliptical outline, small subangular attenuated ears, four or rarely five costae per ventral flank, and prominent boun
. Bulletins of American paleontology. 0.60 0.65 0.70 0.75 0.80. Text-figure 13.—Transverse serial sections of Plcctospira problcmaiica (Girty) X 6, USNM 154735 from USNM locality 9045, measurements (mm) from ventral beak. A small specimen. crural bases and cardinal process; crura projecting laterally pos- teriorly but descending anteriorly, becoming ventrally directed; spiralia and jugum not observed; muscle scars defined by two dis- tinct ridges that extend forward from the bases of the socket ridges. Holotype. —USNM No. 121190 collected from USGS locality 2623. Distinguishing characters. — P Stock Photo
RMRG9PMP–. Bulletins of American paleontology. 0.60 0.65 0.70 0.75 0.80. Text-figure 13.—Transverse serial sections of Plcctospira problcmaiica (Girty) X 6, USNM 154735 from USNM locality 9045, measurements (mm) from ventral beak. A small specimen. crural bases and cardinal process; crura projecting laterally pos- teriorly but descending anteriorly, becoming ventrally directed; spiralia and jugum not observed; muscle scars defined by two dis- tinct ridges that extend forward from the bases of the socket ridges. Holotype. —USNM No. 121190 collected from USGS locality 2623. Distinguishing characters. — P
. Bulletins of American paleontology. . 4.5 5.5 6.5 Text-figure 34.—Transverse serial sections of Fusclla llanoensis, n. sp. XL USNM 154848 from USNM locality 9045, measurements (mm) from ventral beak. Interior of brachial valve with a spiriferoid cardinal process composed of ten or a dozen thin vertical plates; socket ridges uniting beneath the umbo to form an apical callosity just below the cardinal process; sockets of moderate size, open posteriorly; crural bases produced from inner surfaces of the socket ridges; spiralia unknown; low median ridge extending anteriorly four or five millimete Stock Photo
RMRG9F4A–. Bulletins of American paleontology. . 4.5 5.5 6.5 Text-figure 34.—Transverse serial sections of Fusclla llanoensis, n. sp. XL USNM 154848 from USNM locality 9045, measurements (mm) from ventral beak. Interior of brachial valve with a spiriferoid cardinal process composed of ten or a dozen thin vertical plates; socket ridges uniting beneath the umbo to form an apical callosity just below the cardinal process; sockets of moderate size, open posteriorly; crural bases produced from inner surfaces of the socket ridges; spiralia unknown; low median ridge extending anteriorly four or five millimete
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