Phoronids

Figure 2.Phoronis ijimai Oka, 1897, NSMT-Te 879. A Living individuals collected from the pier of Misaki Marine Biological Station B enlargement of living individuals C preserved individual (10% formalin seawater) with a transparent cylindrical tube.

Figure 3.Phoronis ijimai Oka, 1897, NSMT-Te 880. A Living bivalve (Barbatia sp.) with various sessile organisms B Living Phoronis ijimai on the shell (arrowheads).

Figure 4.Phoronis ijimai Oka, 1897, NSMT-Te 885, transverse section through basal part of lophophore.

Cerianthid phoronid worm; Phoronis australis

Figure 5.Reconstructed three-dimensional images and transverse sections of the nephridium of Phoronis ijimai Oka, 1897, from NSMT-Te 886 (A, B, D) and NSMT-Te 884 (C). A Lateral view, showing the long nephridial papillae above the anus B dorsolateral view, showing the offset arrangement of the nephridia, with the curved ascending branch and large anal funnel extending toward the esophagus C transverse section through the nephridial papilla, showing the nephridiopore D transverse section through the ascending branch, showing the large anal funnel opening toward the esophagus, Abbreviations: ab ascending branch; af anal funnel; an anus; es esophagus; in intestine; lne left nephridium; np nephridial papilla; p nephridiopore; rne right nephridium. Planes C and D in panel A indicate the positions of the transverse sections in C and D.

Figure 6.Phoronis ijimai. A NSMT-Te 886, transverse section through the posterior part of the body, showing four mesenteries and the position of the giant nerve fibers B NSMT-Te 885, enlargement showing longitudinal muscles of the bushy type C NSMT-Te 885, enlargement of the left giant nerve fiber situated at the base of the left lateral mesentery. Abbreviations: am anal mesentery; i intestine; llm left lateral mesentery; lnf left giant nerve fiber; m longitudinal muscle; om oral mesentery; rlm right lateral mesentery; rnf right giant nerve fiber; s stomach.

Figure 7.Phoronis ijimai. A NSMT-Te 878, eggs brooded in the lophophore (some tentacles have been removed) B NSMT-Te 884, transverse section through the basal part of the lophophore, showing mature eggs on the basal nidamental glands C NSMT-Te 883, enlargement of brooded eggs, showing various developmental stages. Abbreviations: eg egg; te tentacle.

Figure 8.Phoronis emigi sp. n., NSMT-Te 714 (holotype), photographed in the preserved state (10% formalin seawater) before sectioning.

Figure 9.Phoronis emigi sp. n., NSMT-Te 713 (paratype), transverse section through the basal part of the lophophore.

Figure 10.Reconstructed three-dimensional images and transverse sections of the nephridium of Phoronis emigi sp. n., based on NSMT-Te 721 (paratype). A Lateral view, showing the different lengths of the ascending and descending branches B dorsal view, showing the offset arrangement of the nephridia, with the nephridiopores at different levels along the body axis C transverse section through the ascending branch D transverse section through the tip of the descending branch, showing the nephridial funnels. Abbreviations: ab ascending branch; an anus; db descending branch; es esophagus; in intestine; lne left nephridium; nf nephridial funnel; p nephridiopore; rne right nephridium; ti funnel tissue. Planes C and D in panel A indicate the positions of the transverse sections in C and D.

Figure 11.Phoronis emigi sp. n., NSMT-719 (paratype). A Transverse section through the posterior part of the body, showing four mesenteries and the position of the giant nerve fiber B enlargement of longitudinal muscles of the long feathery type. Abbreviations: am anal mesentery; lnf left giant nerve fiber; i intestine; llm left lateral mesentery; om oral mesentery; rlm right lateral mesentery; s stomach.

Phoronid Worm from Koh Phangan, Thailand

Phoronid Worm from Mae Haad Reef, Koh Phangan

Cerianthid phoronid worm; Phoronis australis