Nebela from British Columbia

Summary:

Thierry Heger found this species in British Columbia. We believe it is a new species as it does not match any described species we know.

Nebela from British Columbia

Edward Mitchell 14 Mar 2011 08:47

This species is perhaps most similar to Nebela penardiana, but differs form it by the wavy side of the shell.

If you have any suggestion or if you have seen this species elsewhere we would be interested in your input!

Re: Nebela from British Columbia

LARA Enrique 14 Mar 2011 09:31

I must add here that this species is not closely related (genetically) neither N. penardiana, nor to N. tubulosa (results based on COI sequences)…

Re: Nebela from British Columbia

Ralf Meisterfeld 15 Mar 2011 08:03

Morphologically it looks like a Nebela gracilis, perhaps the var. stomata Wailes 1912. If necessary I can send you the description, but copy paste does not work.

Re: Nebela from British Columbia

dlahr 15 Mar 2011 21:09

I found a few online sources for Ralf’s suggestion that may facilitate discussion:

Original description of Nebela gracilis by Penard can be found here http://www.biodiversitylibrary.org/page/10712428#page/1001/mode/1up

This link will take straight to figure 6 and 7 in plate 8 at the end of book, for description navigate back to page 934.

The variety described by Wailes is on page 157 here http://www.biodiversitylibrary.org/page/32143949#page/209/mode/1up

I paste the text here:

N. gracilis, Penard. (Rev. Suisse Zool. 1910.)

Var. STOMATA, var. nov. (PL 12. figs. 41 & 42.)

This variety differs from the type in the possession of two evaginated
pores, one on either side of the neck. Similar protuberances occur on other
Nebelae, i. e. N. tuberosa and N. americana. Individuals also occur here of a
more slender form than shown in figs. 41 & 42, with a long, slender neck ;
they are below the average size, measuring about 90 um in length.

Length 90-130 um; breadth about half the length or less ; thickness two-
thirds of the breadth ; aperture oval, about 20 um by 13um, slightly notched in narrow view.

Distribution. Peru (l. 107-130 um) ; Long Island, U.S.A. (l. 100-116 um).

If you scroll down a few pages you’ll get to the figures.

Hope this helps.

---

Pseudopod your life.

Re: Nebela from British Columbia

anush 21 Mar 2011 16:14

I think that this species is quiet different from Nebela gracilis var. stomata by shape of the margin and size. N. gracilis var. stomata has not such a wavy margin and it is much smaller.