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Chasmataspidids,
sometime referred to as chasmataspids, are a
group of
extinct chelicerate arthropods that form the
order Chasmataspidida. Chasmataspidids...
- existed, and the two may be
sister groups. The difficult-to-classify
chasmataspidids are also
thought to be
closely related to
horseshoe crabs. The radiation...
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Kiaeria is a
genus of
chasmataspidid, a
group of
extinct aquatic arthropods. It was
originally classified as a
xiphosuran of the
monotypic family Kiaeriidae...
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Hardieopterus lanarkensis A
hardieopterid eurypterid.
Loganamaraspis dunlopi A
chasmataspidid.
Cyamocephalus loganensis A synziphosurine.
Pseudoniscus falcatus A...
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Chasmataspis is a
genus of
chasmataspidid, a
group of
extinct aquatic chelicerate arthropods. It was
found in the
Early Ordovician deposits of Tennessee...
- (jellyfish), as well as
linguloid brachiopods, algae, and
arthropods (namely
chasmataspidids,
leperditid ostracods, and eurypterids).
Brechin Lagerstätte 450 Ma...
-
family Dicranaceae Kiaeria limuloides, an
extinct monotypic genus of
chasmataspidid Kiaeritia, a
genus of
ostracod formerly known as
Kiaeria This disambiguation...
- crabs) and
Planaterga (a
group comprising bunodids, pseudoniscids,
chasmataspidids,
eurypterids and arachnids), as well as
several basal synziphosurid...
- Lagerstätte of Iowa (USA)
reveals the
ground plan of
eurypterids and
chasmataspidids". The
Science of Nature. 102 (9–10): 63. Bibcode:2015SciNa.102...63L...
-
number of
extinct lineages, such as the
eurypterids (sea scorpions) and
chasmataspidids.
Chelicerata split from
Mandibulata by the mid-Cambrian, as evidenced...
