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7 results for “Carinomella”
Figure 7 in Ultrastructure of the pseudocnidae of the palaeonemerteans Cephalothrix cf. rufifrons and Carinomella lactea and an assessment of their phylogenetic utility
Figure 7. Molecular phylogenies of nemerteans. (A) Phylogeny inferred from 18S rDNA sequences. (B) Phylogeny inferred from a simultaneous analysis of partial 28S rRNA, H3, 16S rRNA and COI gene sequences. Phylogeny ''A'' implies that pseudocnidae were present in the common ancestor of nemerteans and subsequently lost in two lineages Phylogeny ''B'' implies independent evolution of pseudocnidae. Open boxes represent character losses and solid boxes represent character acquisitions.
Figure 3 in Ultrastructure of the pseudocnidae of the palaeonemerteans Cephalothrix cf. rufifrons and Carinomella lactea and an assessment of their phylogenetic utility
Figure 3. Transmission electron micrographs of Cephalothrix cf. rufifrons pseudocnidae and pseudocnida-forming cells. (A) Longitudinal section of a mature pseudocnida. Note the filament core (fc) and the lateral process (lp). (B) Cross-section of a pseudocnida. Note the Golgi complex in the cell cytoplasm and the putative pseudocnida precursor material (arrows). (C) RER (re) containing flocculent material in a pseudocnida-forming cell. Abbreviations: co, cortex; fc, filament core; go, Golgi complex; lp, lateral process; me, medulla; re, rough endoplasmic reticulum (RER).
Figure 6 in Ultrastructure of the pseudocnidae of the palaeonemerteans Cephalothrix cf. rufifrons and Carinomella lactea and an assessment of their phylogenetic utility
Figure 6. Schematic longitudinal TEM sections of nemertean pseudocnidae. (A) Cephalothrix cf. rufifrons. (B) Tubulanus cf. pellucidus. (C) Carinomella lactea. (D) Zygeupolia rubens. (A) and (C) drawn from data presented herein. (B) and (D) drawn from micrographs in Turbeville (1991) and unpublished data. Scale is approximate.
Figure 5 in Ultrastructure of the pseudocnidae of the palaeonemerteans Cephalothrix cf. rufifrons and Carinomella lactea and an assessment of their phylogenetic utility
Figure 5. Transmission electron micrographs of Carinomella lactea pseudocnidae and pseudocnida-forming cells. (A) Longitudinal section of pseudocnidae. Note the medulla (me) cortex (co) and filament core (fc). (B) Cross section of a pseudocnida. Putative pseudocnida precursors are present in the cell cytoplasm (*). (C) Pseudocnidaforming cell revealing Gogli complex (go) and pseudocnida precursor material (*). Abbreviations: co, cortex; fc, filament core; go, Golgi complex; me, medulla; ps, pseudocnida.
Figure 4 in Ultrastructure of the pseudocnidae of the palaeonemerteans Cephalothrix cf. rufifrons and Carinomella lactea and an assessment of their phylogenetic utility
Figure 4. Cross-sections of the proboscis of Carinomella lactea. (A) Survey transmission electron micrograph of the proboscis. Note the pseudocnida-forming cell containing pseudocnidae (arrow). (B) Low-power micrograph revealing two groups of pseudocnidae (arrows) resting on secretions (*) of underlying gland cells. (C) Cross section of a group of pseudocnidae (ps) and a sensory bristle of an adjacent sensory cell. (D) Low-power micrograph of longitudinal sections of pseudocnidae. Note the filament core (fc). Abbreviations: cm, circular muscle; em, extracellular matrix; fc, filament core; gc, gland cell; lm, longitudinal muscle; pc, pseudocnidaforming cell; pe, proboscis peritoneum; pn, proboscis nerve; ps, pseudocnida; sc, sensory cell cilium.
Figure 2 in Ultrastructure of the pseudocnidae of the palaeonemerteans Cephalothrix cf. rufifrons and Carinomella lactea and an assessment of their phylogenetic utility
Figure 2. Transmission electron micrographs of the middle proboscis of Cephalothrix cf. rufifrons. (A) Survey micrograph of a cross section of the middle proboscis. Asterisk (*) indicates a pseudocnida-forming cell. (B) Pseudocnida-forming cell revealing the nucleus, RER and several pseudocnidae. (C) Longitudinal section of pseudocnida. Arrow indicates the filament core. (D) Cross-section of a pseudocnida. Arrow indicates core. (E) Section of an everted proboscis. Apices of the pseudocnidae extend into the lumen. (F) Cross-sections of bases of pseudocnidae. Arrowheads indicate the lateral processes. Also note the sensory cilium of the adjacent sensory cell (sc). Abbreviations: cm, circular muscle; co, cortex; lm, longitudinal muscle; lp, lateral process; me, medulla; pe, proboscis peritoneum; pn, proboscis nerve; rd, fusiform rhabdoid; sc, sensory cell.
Figure 1 in Ultrastructure of the pseudocnidae of the palaeonemerteans Cephalothrix cf. rufifrons and Carinomella lactea and an assessment of their phylogenetic utility
Figure 1. Light micrograph of the everted proboscis of Cephalothrix cf. rufifrons revealing apices of pseudocnidae (arrow). Note also the sensory bristles (sb).
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OpenNeuro
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