Genus Thysanostoma L. Agassiz, 1862

Museums

Regional Maps

• Thysanostoma Agassiz, L. 1862. Contributions to the Natural History of the United States of America. Second monograph. In five parts — Pt. I Acalephs in general. Pt. II Ctenophore. Pt. III. Discophorae. Pt. IV. Hydroidae. Pt. V. Homologies of the Radiata. Boston, London : Little Brown, Trubner Vol. IV i-viii, 380 pp. + (1-10), pls 20-35. [153].

Distribution

States

Queensland

Extra Distribution Information

Also Hawaii, Indonesia, Malaysia, Philippines, Egypt, Japan

Distribution References

Diagnosis

Thysanostomatidae with mouth-arms with or without naked, clubshaped extremities; eight rhopalar canals all with anastomoses; ring canal distinct.

Diagnosis References

Kramp, P.L. 1961. Synopsis of the medusae of the world. Journal of the Marine Biological Association of the United Kingdom 40: 1-469 [364]

Notes

The genus Thysanostoma was proposed by Agassiz (1862: 153) for Lesson's (1829: 120) Rhizostoma brachyura from New Guinea; Lesson (1830) later called the species Melitea brachyura, which Agassiz renamed Thysanostoma lessoni, and Haeckel (1880: 626) renamed T. melitea. Haeckel (1880: 625) also added the species T. thysanura from Australia.

Mayer (1910: 693) adopted Haeckel's (1877, unpublished) genus name Lorifera, which was used by Haeckel (1880: 628) as a junior synonym of Himantostoma. Mayer reasoned that Himantostoma was preoccupied by Loew (1853) for Diptera, and thus Lorifera must be used as an alternative, with Haeckel (1880) as the author. Mayer (1910) was thus the first to publish a description for the nomen nudum used by Haeckel.

Kramp (1961b: 364) included Haeckel's genus Lorifera as a junior synonym of Thysanostoma, including the modern-day T. lorifera and T. flagellata.

History of changes