| Laganidae | |
|---|---|
 | |
| Laganum laganum | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Order: | Clypeasteroida |
| Family: | Laganidae |
Laganidae is a family of echinoderms belonging to the order Clypeasteroida. [1]
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Genera: [1]
Sand dollars are species of flat, burrowing sea urchins belonging to the order Clypeasteroida. Some species within the order, not quite as flat, are known as sea biscuits. Sand dollars can also be called "sand cakes" or "cake urchins".
The beardfishes consist of a single extant genus, Polymixia, of deep-sea marine ray-finned fish named for their pair of long hyoid barbels. They are classified in their own order Polymixiiformes. But as Nelson says, "few groups have been shifted back and forth as frequently as this one, and they were recently added to Paracanthoptergii". For instance, they have previously been classified as belonging to the Beryciformes. They are of little economic importance.
Echinarachnius parma, the common sand dollar, is a species of sand dollar native to the Northern Hemisphere.
André Jean Baptiste Robineau-Desvoidy was a French physician and entomologist specialising in the study of Diptera (flies) and to some extent of the Coleoptera (beetles).
Rhinophorinae is a subfamily of flies (Diptera), commonly known as Woodlouse Flies, found in all zoogeographic regions except Oceania, but mainly in the Palaearctic and Afrotropical regions.
Cassiduloida is an order of sea urchins. The group was extremely diverse with many families and species during the Mesozoic, but today, only seven extant species remain.
The heart urchins or Spatangoida are an order of sea urchins.
Joshua Alder was a British cheesemonger and amateur zoologist and malacologist. As such, he specialized in the Tunicata, and in gastropods.
Holasteroida is an order of irregular sea urchins.
Xiphiacetus is an extinct genus of cetacean known from the Miocene (early Burdigalian to late Tortonian, 20.43 to 7.246 million years ago of Europe and the U.S. East Coast.
Irregularia is an extant infraclass of sea urchins that first appeared in the Lower Jurassic.
The Neognathostomata are a superorder of sea urchins.
Schizaster is a genus of heart urchins belonging to the family Schizasteridae. The type species of the genus is Schizaster studeri.
Amblypneustes is a genus of sea urchins, belonging to the family Temnopleuridae.
Mycteriacetus is an extinct genus of dolphin from the Early Miocene (Burdigalian) of northeastern Italy. The type species is M. bellunensis.
Schizasteridae is a family of echinoderms belonging to the order Spatangoida.
Echinocyamus is a genus of echinoderms belonging to the family Fibulariidae.
Cassidulus is a genus of echinoderms belonging to the family Cassidulidae.
Proraster is a genus of echinoderms belonging to the family Hemiasteridae.
Echinolampas is a genus of echinoderms belonging to the family Echinolampadidae.
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