Biology:Achelata
| Achelata | |
|---|---|
| |
| The phyllosoma larva is characteristic of the Achelata (drawing by Haeckel) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Malacostraca |
| Order: | Decapoda |
| Suborder: | Pleocyemata |
| (unranked): | Reptantia |
| Infraorder: | Achelata Scholtz & Richter, 1995 |
| Families [1] | |
The Achelata is an infra-order of the decapod crustaceans, holding the spiny lobsters, slipper lobsters and their fossil relatives.
Description
The name "Achelata" derives from the fact that all the members of this group lack the chelae (claws) that are found on almost all other decapods (from the Ancient Greek ἀ-, a- = "not", χηλή, chela = "claw"). They are further united by the great enlargement of the second antennae, by the special "phyllosoma" form of the larva, and by a number of other characters.[2]
Classification and fossil record
The infraorder Achelata belongs to the group Reptantia, which consists of the walking/crawling decapods (lobsters and crabs). The cladogram below shows Achelata's placement within the larger order Decapoda, from analysis by Wolfe et al., 2019.[3]
| Decapoda |
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Achelata contains the spiny lobsters (Palinuridae), the slipper lobsters (Scyllaridae) and the furry lobsters (Synaxidae, now usually included in Palinuridae),[4] as well as two extinct families, Cancrinidae and Tricarinidae.[1]
Both Palinuridae and Scyllaridae have a fossil record extending back to the Cretaceous.[5][6] The two fossil families contain a single genus each;[1] Tricarina is known from a single Cretaceous fossil,[7] while Cancrinos is known from the Jurassic and Cretaceous.[6] One estimate of the divergence between Achelata and its closest relatives places it at about 341 million years ago.[8]
References
- ↑ 1.0 1.1 1.2 Sammy De Grave et al. (2009). "A classification of living and fossil genera of decapod crustaceans". Raffles Bulletin of Zoology Suppl. 21: 1–109. Archived from the original on 2011-06-06. https://web.archive.org/web/20110606064728/http://rmbr.nus.edu.sg/rbz/biblio/s21/s21rbz1-109.pdf.
- ↑ Gerhard Scholtz; Stefan Richter (1995). "Phylogenetic systematics of the reptantian Decapoda (Crustacea, Malacostraca)". Zoological Journal of the Linnean Society 113 (3): 289–328. doi:10.1006/zjls.1995.0011. http://decapoda.nhm.org/pdfs/826/826.pdf.
- ↑ Wolfe, Joanna M.; Breinholt, Jesse W.; Crandall, Keith A.; Lemmon, Alan R.; Lemmon, Emily Moriarty; Timm, Laura E.; Siddall, Mark E.; Bracken-Grissom, Heather D. (24 April 2019). "A phylogenomic framework, evolutionary timeline and genomic resources for comparative studies of decapod crustaceans". Proceedings of the Royal Society B 286 (1901). doi:10.1098/rspb.2019.0079. PMID 31014217. PMC 6501934. https://royalsocietypublishing.org/doi/10.1098/rspb.2019.0079.
- ↑ Ferran Palero; Keith A. Crandall; Pere Abelló; Enrique Macpherson; Marta Pascual (2009). "Phylogenetic relationships between spiny, slipper and coral lobsters (Crustacea, Decapoda, Achelata)". Molecular Phylogenetics and Evolution 50 (1): 152–162. doi:10.1016/j.ympev.2008.10.003. PMID 18957325.
- ↑ Francisco J. Vega; Pedro García-Barrera; María del Carmen Perrilliat; Marco A. Coutiño; Ricardo Mariño-Pérez (2006). "El Espinal, a new plattenkalk facies locality from the Lower Cretaceous Sierra Madre Formation, Chiapas, southeastern Mexico". Revista Mexicana de Ciencias Geológicas 23 (3): 323–333. http://www.scielo.org.mx/pdf/rmcg/v23n3/v23n3a7.pdf.
- ↑ 6.0 6.1 Joachim T. Haug; Carolin Haug; Dieter Waloszek; Andreas Maas; Matthias Wulf; Günter Schweigert (2009). "Development in Mesozoic scyllarids and implications for the evolution of Achelata (Reptantia, Decapoda, Crustacea)". Palaeodiversity 2: 97–110. http://www.palaeodiversity.org/pdf/02/Pal_2_04_097-110_gu_4c.pdf.
- ↑ Rodney M. Feldmann; Ali Kolahdouz; Bijan Biranvand; Guenter Schweigert (2007). "A new family, genus, and species of lobster (Decapoda: Achelata) from the Gadvan Formation (Early Cretaceous) of Iran". Journal of Paleontology 81 (2): 405–407. doi:10.1666/0022-3360(2007)81[405:ANFGAS2.0.CO;2]. http://isopods.nhm.org/pdfs/30391/30391.pdf. Retrieved 2012-02-05.
- ↑ Keith A. Crandall; Megan L. Porter; Marcos Pérez-Losada (2009). "Crabs, shrimps and lobsters (Decapoda)". The Timetree of Life. Oxford University Press. pp. 293–297. ISBN 978-0-19-160898-8. https://books.google.com/books?id=TC2cSR4oQY8C&pg=PA296.
External links
Wikidata ☰ Q1191353 entry
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