Soft-body preservation in the leaiid clam shrimp (Branchiopoda, Diplostraca) and its palaeoecological implications
Leaia is a special genus of extinct “conchostracan” branchiopods; its soft parts have not been known until now. The leaiid specimens with soft bodies reported in the present paper came from two localities: the Upper Carboniferous Canso Group of New Brunswick, Canada, and the Permian Mount Glossopter...
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crbrillap:10.1163/15685403-00003349 2024-09-15T17:48:16+00:00 Soft-body preservation in the leaiid clam shrimp (Branchiopoda, Diplostraca) and its palaeoecological implications Shen, Yan-Bin Schram, Frederick R. 2014 http://dx.doi.org/10.1163/15685403-00003349 https://brill.com/view/journals/cr/87/11-12/article-p1338_4.xml https://data.brill.com/files/journals/15685403_087_11-12_s004_text.pdf unknown Brill Crustaceana volume 87, issue 11-12, page 1338-1350 ISSN 0011-216X 1568-5403 journal-article 2014 crbrillap https://doi.org/10.1163/15685403-00003349 2024-08-05T04:11:35Z Leaia is a special genus of extinct “conchostracan” branchiopods; its soft parts have not been known until now. The leaiid specimens with soft bodies reported in the present paper came from two localities: the Upper Carboniferous Canso Group of New Brunswick, Canada, and the Permian Mount Glossopteris Formation of the Ohio Range, Holick Mountains, Antarctica. They include head, biramous antennae, mandible, shell gland, male claspers, and digestive tube. These parts together fully demonstrate that the leaiid clam shrimp indeed should be attributed to the crustaceans, instead of Mollusca. Based on the ribbed valves and structure of soft parts it should be placed in the branchiopodan Diplostraca. We believe that this group, which went extinct at the end of the Permian, is quite different from those of Laevicaudata, Spinicaudata, and Cyclestheriida. Hence, it should have its own higher taxon, Leaiina. The well-developed and sharply pointed head, delicate and short biramous antennae, in concert with the radial ribs on the valves probably indicate a burrowing in-faunal habit. Article in Journal/Newspaper Antarc* Antarctica Brill Crustaceana 87 11-12 1338 1350 |
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Leaia is a special genus of extinct “conchostracan” branchiopods; its soft parts have not been known until now. The leaiid specimens with soft bodies reported in the present paper came from two localities: the Upper Carboniferous Canso Group of New Brunswick, Canada, and the Permian Mount Glossopteris Formation of the Ohio Range, Holick Mountains, Antarctica. They include head, biramous antennae, mandible, shell gland, male claspers, and digestive tube. These parts together fully demonstrate that the leaiid clam shrimp indeed should be attributed to the crustaceans, instead of Mollusca. Based on the ribbed valves and structure of soft parts it should be placed in the branchiopodan Diplostraca. We believe that this group, which went extinct at the end of the Permian, is quite different from those of Laevicaudata, Spinicaudata, and Cyclestheriida. Hence, it should have its own higher taxon, Leaiina. The well-developed and sharply pointed head, delicate and short biramous antennae, in concert with the radial ribs on the valves probably indicate a burrowing in-faunal habit. |
format |
Article in Journal/Newspaper |
author |
Shen, Yan-Bin Schram, Frederick R. |
spellingShingle |
Shen, Yan-Bin Schram, Frederick R. Soft-body preservation in the leaiid clam shrimp (Branchiopoda, Diplostraca) and its palaeoecological implications |
author_facet |
Shen, Yan-Bin Schram, Frederick R. |
author_sort |
Shen, Yan-Bin |
title |
Soft-body preservation in the leaiid clam shrimp (Branchiopoda, Diplostraca) and its palaeoecological implications |
title_short |
Soft-body preservation in the leaiid clam shrimp (Branchiopoda, Diplostraca) and its palaeoecological implications |
title_full |
Soft-body preservation in the leaiid clam shrimp (Branchiopoda, Diplostraca) and its palaeoecological implications |
title_fullStr |
Soft-body preservation in the leaiid clam shrimp (Branchiopoda, Diplostraca) and its palaeoecological implications |
title_full_unstemmed |
Soft-body preservation in the leaiid clam shrimp (Branchiopoda, Diplostraca) and its palaeoecological implications |
title_sort |
soft-body preservation in the leaiid clam shrimp (branchiopoda, diplostraca) and its palaeoecological implications |
publisher |
Brill |
publishDate |
2014 |
url |
http://dx.doi.org/10.1163/15685403-00003349 https://brill.com/view/journals/cr/87/11-12/article-p1338_4.xml https://data.brill.com/files/journals/15685403_087_11-12_s004_text.pdf |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Crustaceana volume 87, issue 11-12, page 1338-1350 ISSN 0011-216X 1568-5403 |
op_doi |
https://doi.org/10.1163/15685403-00003349 |
container_title |
Crustaceana |
container_volume |
87 |
container_issue |
11-12 |
container_start_page |
1338 |
op_container_end_page |
1350 |
_version_ |
1810289430215262208 |