Search the Community
Showing results for tags 'Maotianshan'.
-
The longest one is roughly 2cm long. I’ve counted 12 on the rock, which itself is about 5cm long. All I know is that it’s from the Maotianshan shales in China. I was told it’s a Yunnanozoon, but I believe this is incorrect as the person I got it from is often wrong with their identifications.
- 16 replies
-
- 1
-
- cambrian
- chengjiang
-
(and 5 more)
Tagged with:
-
Possible synonyms Protopriapulites haikouensis Hou, Bergström, Wang, Feng & Chen, 1999. The correct name is Sicyophorus rara and not as often found Sicyophorus rarus. Description from Hou et al. 2017, p 124: "This is a relatively common priapulid‐like worm, known from over a thousand specimens. In many cases the material consists of compressed, complete individuals, and the posterior half of the body is often better preserved with an apparently rigid outline. Detailed structures can be detected by subtle differences in color and relief. The size of the animal is generally about 1cm long. The overall body shape is reminiscent of a dumb‐bell, with a sub-equally expanded introvert and posterior trunk connected by a constricted neck region. The introvert bears spine‐like scalids arranged in about 20 longitudinal rows and 14 circlets. The narrower anterior part of the proboscis is protrusive and appears to bear a regular array of tiny spines. The trunk cuticle is apparently more rigid than the introvert, and is covered in a series of 13–15 longitudinal plates divided by dark ridges. The distinct gut is heavily coiled and filled with sediment, almost entirely occupying the ovoid trunk." Line drawing from Hou et al. 2017, p. 124: References: Luo, Huilin, Hu, Shixue, Chen, L., Zhang, S., Tao, Y. (1999). Early Cambrian Chengjiang fauna from Kunming region, China. Yunnan Science and Technology Press, Kunming, pp. 1–189 (in Chinese with English summary). D. Y. Huang, J. Vannier, and J. Y. Chen (2004). Anatomy and lifestyles of Early Cambrian priapulid worms exemplified by Corynetis and Anningvermis from the Maotianshan Shale (SW China). Lethaia 37:21-33. S. Q. Dornbos and J.-Y. Chen (2008) Community palaeoecology of the early Cambrian Maotianshan Shale biota: Ecological dominance of priapulid worms. Palaeogeography, Palaeoclimatology, Palaeoecology 258:200-212. Andreas Maas, Diying Huang, Junyuan Chen, Dieter Waloszek, Andreas Braun (2007). Maotianshan-Shale nemathelminths — Morphology, biology, and the phylogeny of Nemathelminthes. , 254(1-2), 0–306. Hou et al. (2017) The Cambrian Fossils of Chengjiang, China: The Flowering of Early Animal Life, 2nd Edition. Wiley-Blackwell. DOI:10.1002/9781118896372.
- 3 comments
-
- 3
-
Someone is selling this fossil at auction, saying they don’t know what it is, but it might be a lobopodian. Any ideas?
- 10 replies
-
- cambrian
- chengjiang
-
(and 4 more)
Tagged with:
-
What is this thing? It looks like a platypus worm with spines coming out of its head. It’s from the Maotianshan Shale in Yunnan, China. What is it?
- 8 replies
-
- cambrian
- chengjiang
-
(and 4 more)
Tagged with:
-
Leptomitus teretiusculus is a moderately common, thin-walled sponge species. Specimens range up to 11cm long and about 1,2cm wide. Literature: J. Y. Chen, X. G. Hou, and H. Z. Lu. 1989. Lower Cambrian leptomitids (Demospongea), Chengjiang, Yunnan. Acta Palaeontologica Sinica 28(1):17-30
- 1 comment
-
- cambrian
- chengjiang
-
(and 5 more)
Tagged with:
-
A new trilobite for my collection I don't think more complete specimens exist.
- 3 comments
-
References: Liu, J. et al.(2012) New occurence of the Cambrian (Stage 4, Series 2) Guanshan Biota in Huize, Yunnan, South China. Bulletin of Geosciences Vol. 87, 1, 2012, pp125-132
-
- 1
-
- cambrian
- chengjiang
-
(and 3 more)
Tagged with:
-
From the album: Anomalocaris and friends.
A large grasping appendage of the Chinese Anomalocaridid, Amplectobelua symbrachiata. A cousin of the Anomalocaris. This grasper is a very large example at 89mm. From the Maotianshan Shales in Chengjiang. Lower Cambrian, ~525Ma.- 2 comments
-
- 1
-
- Amplectobelua
- Anomalocaris
-
(and 3 more)
Tagged with:
-
Hello, here are two different specimens I bought 2 – 3 years ago from a trustworthy Chinese dealer via ebay; the specimens were labelled as lower Cambrian (Chengjiang biota): Quiongszhusi Section Heilinpu Formation Locality : Maotianshan They look like graptolites from the order Graptoloidea. However, the earliest graptoloidea are known from the lowermost ordovician. Meanwhile, a pterobranchia from the order Rhabdopleurida was described from the Atdabanian of the Chengjiang biota (Galeaplumosus) as the earliest pterobranchia; however, this is not a graptolite, only a close relative. Thus, it became clear that no real graptolites are known (described) from the Chengjiang biota. This rises several possibilities: (i) the fossils shown here are not graptolites, but something different (but what?) (ii) the fossils are the oldest graptolites/graptoloidea and so far undescribed. However, this seems extremely unlikely since several specimens of that kind were sold and (as is shown on one specimen) they don’t seem to be rare; so it’s very improbable that they were not noticed until now. (iii) the fossils are indeed graptoloid graptolites, but from younger strata (Ordovician, Silurian?) and locality and stratigraphic information are wrong. However, the seller seemed trustworthy to me with a lot of knowledge about the fossils from his area and hunts fossils in the field himself (though I don’t know whether he collected these two specimens himself). Mislabelling may happen more easily if fossils are sold second hand. I prefer (iii), but perhaps somebody may know more about these fossils or where they come from. Thanks! araucaria1959
- 17 replies
-
- Chengjiang
- Graptoloidea
-
(and 2 more)
Tagged with: