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12 results for “Tjalfiella”
FIGURE 3 in Redescription of the deep-sea benthic ctenophore genus Tjalfiella from the North Atlantic (Class Tentaculata, Order Platyctenida, Family Tjalfiellidae)
FIGURE 3. Still images of living specimens of TJalfiella aff. tristroma (2018); A. In situ observation of four individuals on host octocoral Acanella sp. Scale bar—2cm, B. Still image of a collected individual in a retracted state, showing the body shape and reproductive system, C. Closeup of the aboral side, showing the opening of the arm with a simple tentacle, D. Closeup of arms, showing the coiling of tentacles and the relaxed state of the animal. Scale bar B to D—0.25cm.
FIGURE 4 in Redescription of the deep-sea benthic ctenophore genus Tjalfiella from the North Atlantic (Class Tentaculata, Order Platyctenida, Family Tjalfiellidae)
FIGURE 4. Additional observation by NOAA of platyctenes of similar morphology to TJalfiella aff. tristoma (2018) on dive EX1806_D17. Arrows point to individual platyctenes in the branches of Acanella sp. Scale bar—2cm.
FIGURE 8 in Redescription of the deep-sea benthic ctenophore genus Tjalfiella from the North Atlantic (Class Tentaculata, Order Platyctenida, Family Tjalfiellidae)
FIGURE 8. Illustrated Plate of TJalfiella tristoma collected by Kramp: A. representation of specimens in their natural position on the stalk of Umbellula lindahli, B. view of flattened face of aboral arm, C. young specimen of T. tristoma with asymmetrical gonads and no brood pouches, tentacular view, D. mature T. tristoma, tentacular view, E. aboral schematic of arrangement of diverticula and associating canals, F. stomodeal view of mature T. tristoma, G. cutaway illustration featuring internalized anatomy. Tj—TJalfiella tristoma, H—Host coral (Umbellula lindahli), a.a.—aboral arm, a.f.—aboral face, b.—brooding pouch, d.b.—diverticula that transverse along the body, d.g.—gonadal diverticula, d.p.—diverticula protrusions, d.t.—tentacular diverticula, g.—gonads, m.—mouth, o.s.—oral skirt, s.c.—suboral cavity, s.—statocyst, s.f.—stomodeal folds, s.o.—secondary opening (mouth), t.—tentacle, t.b.—tentacle bulb, t.s.—tentacle sheath, t.o.—tentacle opening.
FIGURE 7 in Redescription of the deep-sea benthic ctenophore genus Tjalfiella from the North Atlantic (Class Tentaculata, Order Platyctenida, Family Tjalfiellidae)
FIGURE 7. Maximally likely (ML) phylogenetic reconstructions of Platyctenida; A. ML topology based on mitochondrial COI gene. ML bootstrap support indices are indicated near the corresponding nodes. B. ML topology based on the nuclear 18S rDNA gene. Bootstrap support indices are indicated near the corresponding nodes, with only those exceeding 70 being shown. Representatives of Coeloplana, Lampea, Lyrocteis, and Vallicula were obtained from GenBank. Coloration is used to differentiate between genera.
FIGURE 2 in Redescription of the deep-sea benthic ctenophore genus Tjalfiella from the North Atlantic (Class Tentaculata, Order Platyctenida, Family Tjalfiellidae)
FIGURE 2. Map featuring reported species distribution. Diamond—Type locality specimen by Mortensen (1910, 1912), Triangle—Sample (NHMD88841) collected by Kramp in 1928, Square—Sample collected by NOAA (UNSM-IZ-1490693) in 2018, Circle—Sample collected by NOAA (USNM-IZ-1674065) in 2022.
FIGURE 6. MicroCT 3D in Redescription of the deep-sea benthic ctenophore genus Tjalfiella from the North Atlantic (Class Tentaculata, Order Platyctenida, Family Tjalfiellidae)
FIGURE 6. MicroCT 3D reconstruction of three TJalfiella samples: A. Tentacular view of T. tristoma, B. Tentacular view of T. aff. tristoma (2018), C. Tentacular view of T. aff. tristoma (2022), D. Stomodeal view of T. tristoma, E. Stomodeal view of T. aff. tristoma (2018), F. Stomodeal view of T. aff. tristoma (2022), G. Colorized internal anatomy of T. tristoma with low opacity body overlay, H. Colorized internal anatomy of T. aff. tristoma (2018) with low opacity body overlay, I. Colorized internal anatomy of T. aff. tristoma (2022) with low opacity body overlay, J. Closeup of aboral arms face with centralized opening and tentacle, K. Isolated view of intact larval T. aff. tristoma (2018) within the brood chamber, tentacular view, I. Closeup of developing brood chambers along diverticula protrusions. Blue—gastrovascular cavity (e.g., suboral cavity), Purple—Gonads, Magenta—brood pouches, Pink—tentacular apparatus, Green—canals, Teal—generalized larval anatomy. Scale bar: A–F— 3mm, G–I—1.6mm, J–L—0.3mm.
FIGURE 11 in Redescription of the deep-sea benthic ctenophore genus Tjalfiella from the North Atlantic (Class Tentaculata, Order Platyctenida, Family Tjalfiellidae)
FIGURE 11. Illustrated Plate of larval TJalfiella aff. tristoma (2018) collected by NOAA: A. tentacular plane, B. aboral view, C. oral view, a.c.—anal canal, c.p.—ctene plate, c.r.—ctene row, m.—mouth, p.—pharynx, s.—statocyst, t.—tentacle, t.b.—tentacle bulb.
FIGURE 5 in Redescription of the deep-sea benthic ctenophore genus Tjalfiella from the North Atlantic (Class Tentaculata, Order Platyctenida, Family Tjalfiellidae)
FIGURE 5. Still images of living specimens of TJalfiella aff. tristroma (2022) with respect to host coral; A. In situ observation of the host coral Adinisis sp. Scale bar—2cm, B. Close-up still image of the collected host with several platyctenes in a retracted state. Scale bar—0.75cm, C. Tentacular view of two individual platyctenes separated from host coral. Arrows point to individual platyctenes on the collected Adinisis sp. Scale bar—0.5cm.
FIGURE 10 in Redescription of the deep-sea benthic ctenophore genus Tjalfiella from the North Atlantic (Class Tentaculata, Order Platyctenida, Family Tjalfiellidae)
FIGURE 10. Illustrated Plate of TJalfiella aff. tristoma (2018) collected by NOAA: A. representation of specimens in their natural position on the stalk of Acanella sp., B. mature T. aff. tristoma (2018), tentacular view, C. Cross section of a gonad, D. Stomodeal view of mature T. aff. tristoma (2018), E. cutaway illustration featuring internalized anatomy, tentacular view. F. Closeup drawing showing the development of brood pouch on diverticula protrusions, G. view of the flattened face of aboral arm, H. aboral schematic of the arrangement of diverticula and associating canals; Tj—TJalfiella aff. tristoma (2018), H—Host coral (Acanella sp.), a.a.—aboral arm, a.f.—aboral face, b.—brooding pouch, d.b.—diverticula that transverse along the body, d.g.—gonadal diverticula, d.p.—diverticula protrusions, d.t.—tentacular diverticula, g.—gonads, m.—mouth, o.s.—oral skirt, s.c.—suboral cavity, s.—statocyst, s.f.—stomodeal folds, s.o.—secondary opening (mouth), t.—tentacle, t.b.—tentacle bulb, t.s.—tentacle sheath, t.o.—tentacle opening.
FIGURE 1 in Redescription of the deep-sea benthic ctenophore genus Tjalfiella from the North Atlantic (Class Tentaculata, Order Platyctenida, Family Tjalfiellidae)
FIGURE 1. Reproduction of the original Plate 1 of Mortensen's 1912 description of TJalfiella tristoma. 1. Photograph of two specimens in their natural position on the stalk of Umbellula lindahli. 2. A young specimen, without embryos, tentacular view, 3. A larger specimen, with a single embryo, tentacular view, 4. Specimen showing the right half in regeneration. No embryos, tentacular view. 5. Young specimen, without embryos and possibly experiencing regeneration, tentacular view. 6. Fully developed specimen, aboral view, 7. Specimen having lost the right aboral arm with the tentacle and the outer pair of genital organs, tentacular view. 8. Specimen in regeneration, tentacular view. 9. Fully developed specimen, with numerous brood pouches, tentacular view (same specimen as in Fig. 6).
FIGURE 12 in Redescription of the deep-sea benthic ctenophore genus Tjalfiella from the North Atlantic (Class Tentaculata, Order Platyctenida, Family Tjalfiellidae)
FIGURE 12. Illustrated Plate of TJalfiella aff. tristoma (2022) collected by NOAA: A. representation of specimens in their natural position on the stalk of Adinisis sp., B. mature T. aff. tristoma (2022), tentacular view, C. Stomodeal view of mature T. aff. tristoma (2022), D. cutaway illustration featuring internalized anatomy, tentacular view. E. view of the flattened face of the aboral arm, F. aboral schematic of the arrangement of diverticula and associating canals, Tj—TJalfiella aff. tristoma (2022), H—Host coral (Adinisis sp.), a.a.—aboral arm, a.f.—aboral face, d.b.—diverticula that transverse along the body, d.g.—gonadal diverticula, d.p.—diverticula protrusions, d.t.—tentacular diverticula, g.—gonads, m.—mouth, o.s.—oral skirt, s.c.—suboral cavity, s.—statocyst, s.f.—stomodeal folds, s.o.—secondary opening (mouth), t.—tentacle, t.b.—tentacle bulb, t.s.—tentacle sheath, t.o.—tentacle opening.
FIGURE 9 in Redescription of the deep-sea benthic ctenophore genus Tjalfiella from the North Atlantic (Class Tentaculata, Order Platyctenida, Family Tjalfiellidae)
FIGURE 9. Simple schematic of the structure of the canal and reproductive system in three families of Platyctenida viewed from the aboral side; A. Tjalfiellae, B. Coeloplanidae, C. Lyroctenidae. c—canal system, g—gonads, s—statocyst, t—tentacular apparatus.
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