Talk:Hydrozoa

Incorrect Image

From: Mikhail Matz <****@mail.utexas.edu> Subject: Ha! (wiki page for hydrozoa): 2009_spring_51090_BIO_448L Hello folks, check out the very first picture on this Wikipedia page, devoted to Hydrozoa: http://en.wikipedia.org/wiki/Hydrozoa the picture is entitled "Closeup of a hydrozoan colony". But, as any of you can now see with a wicked nerdy satisfaction, it is actually a Bryozoan!!!! Check out the very regular bell-shaped tentacle arrangements (lophophore), and the zooids that have their polypide completely retracted into zooecium - those are the terminal zooids of the branch, the ones that are actually in focus. Somebody, please correct that!!!! On a more general note, it was great fun teaching you people. Thanks for taking this course and, in particular, putting up with the dreaded moscow style!!! cheers Misha

Flotation of Hyrda

I am not convinced by the statement re Hyrdas secreting gas bubbles from the pedal gland to provide flotation. This was included in many victorian text books and re-iterated in more modern texts but in many years of studying hydra I have never observed the phenomenum. Certainly Hydra move across the surface film of ponds with their tentacles hanging down and they also have been seen to 'walk' across the surface by bending the body stalk up and attaching by the mouth and then swinging the body over to re-attach the pedal gland - but all of this using surface tension only. Any evidence for this supposed gas excretion from modern observational or experimental biology ?
Velela 16:04, 17 Feb 2005 (UTC)

grammar check

"When a gonangia buds, a medusae is produced."

now, i'm no expert, but shouldn't that be "when a gonangion buds, a medusa is produced?"pauli 02:58, 6 August 2005 (UTC)

I am pretty sure that the original grammer is correct because my Biology book (Cambell, Reece, Biology 8th Edition) implies that medusa is plural and that medusae is singular. I am not sure about gonangia, but I am pretty sure that is singular as well, although i cannot remember where I remember that from. BubbleBuggy (talk) 23:44, 8 February 2011 (UTC)

This is old, but medusa is singular, medusae is plural. It's a first declension noun in Latin. Esoxid^t•contribs 16:12, 17 October 2012 (UTC)

Stylasterina?

Some places on the net names Stylasterina as an order of Hydrozoa. What is the reliable source to check? þħɥʂıɕıʄʈ^ʝɘɖı 04:37, 5 September 2006 (UTC)

Probably, current most reliable reference is, J. Bouillon, M.D. Medel, F. Pagès, J.M. Gili, F. Boero and C. Gravili. 2004. Fauna of the Mediterranean Hydrozoa. Scientia Marina, 68 (Suppl. 2). You can find it here. [1]. I think that the infobox for the list of orders should be revised. I will edit when I have a time. --Isorhiza 08:49, 22 November 2006 (UTC)

Wiki Education assignment: Invertebrate Zoology

This article was the subject of a Wiki Education Foundation-supported course assignment, between 8 January 2024 and 29 April 2024. Further details are available on the course page. Student editor(s): Kelseywigger (article contribs).

— Assignment last updated by Ibrip99 (talk) 15:25, 12 February 2024 (UTC)