Search the Community
Showing results for tags 'Achistrum'.
-
Earlier this week I had 2 concretions pop open that I weren’t too sure of what they were. Number one has the calcite desiccation cracks that are consistent with Achistrum sp. I guess the shape is what is kind of throwing me off, and the body seems to segmented, which reminded me of a millipede. Number 2 I cant really see any discernible features in it at all but if I had to guess a type of a polychaete worm? Anyway I’m gonna leave this to the experts lol. Any help is appreciated!
- 3 replies
-
- 2
-
- achistrum
- concretion
-
(and 5 more)
Tagged with:
-
Hello, here are two purported sea cucumbers among some Mazon Creek material I purchased some time ago. The first, better preserved specimen (with counterpart) was labeled without genus, the second specimen was labeled as Achistrum sp. when I got them. Is this correct? The second one looks like some Achistrum material depicted in the net, though my specimen is small (about 2 cm) and possibly only a fragment. However, I don't see anything specific in this specimen that reminds me of a sea cucumber, but the specimens "in the net" (google picture search) are of similar "structure" (except that they are longer/more complete). The first specimen (28 mm long) is different from that material, e.g. with "undulated" distal part of the body; I can well image that this can be a sea cucumber (much more plausible than my specimen of purported "Achistrum"). However, since it's so different compared to the material of Achistrum that is usually depicted, this rises the question whether specimen 1 is another genus or if it is only another (better?) style of preservation of Achistrum? Or no sea cucumber at all? Thanks, araucaria1959
- 2 replies
-
- Achistrum
- Mazon Creek
-
(and 2 more)
Tagged with: