Talk:Hydrozoa

message: 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)
thread_title: Incorrect Image

message: 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)
thread_title: Flotation of Hyrda

message: "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)
replies: text: This is old, but medusa is singular, medusae is plural. It's a first declension noun in Latin. Esoxidt•contribs 16:12, 17 October 2012 (UTC)
thread_title:  grammar check 

message: Some places on the net names Stylasterina as an order of Hydrozoa. What is the reliable source to check?
þħɥʂıɕıʄʈʝɘɖı 04:37, 5 September 2006 (UTC)
replies: text: 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. . 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)
thread_title:  Stylasterina? 

message: — Assignment last updated by Ibrip99 (talk) 15:25, 12 February 2024 (UTC)
thread_title: Wiki Education assignment: Invertebrate Zoology