Stenopodidea

Stenopodidea; Temporal range:
	Stenopus hispidus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Malacostraca
Order:	Decapoda
Suborder:	Pleocyemata
Infraorder:	Stenopodidea; Claus, 1872
Families
	Macromaxillocarididae Alvarez, Iliffe & Villalobos, 2006; Spongicolidae Schram, 1986; Stenopodidae Claus, 1872;

The Stenopodidea or boxer shrimps are a small group of decapod crustaceans. Often confused with Caridea shrimp or Dendrobranchiata prawns, they are neither, belonging to their own group.

Anatomy

They can be differentiated from the Dendrobranchiata prawns by their lack of branching gills, and by the fact that they brood their eggs instead of directly releasing them into the water. They differ from the Caridea shrimp by their greatly enlarged third pair of legs.[1]

Taxonomy

Stenopodidea belongs to the order Decapoda, and is most closely related to the Caridea and Procarididea infraorders of shrimp. The cladogram below shows Stenopodidea's relationships to other relatives within Decapoda, from analysis by Wolfe et al., 2019.[2]

Decapoda

Dendrobranchiata (prawns)

Pleocyemata

Stenopodidea (boxer shrimp)

	Procarididea

	Caridea (true shrimp)

Reptantia (crawling/walking decapods)

Achelata (spiny lobsters, slipper lobsters)

	Polychelida (benthic crustaceans)

	Astacidea (lobsters, crayfish)

Axiidea (mud shrimp, ghost shrimp, or burrowing shrimp)

Gebiidea (mud lobsters and mud shrimp)

	Anomura (hermit crabs and others)

	Brachyura (crabs)

There are 71 extant species currently recognized within Stenopodidea, divided into 12 genera.[3] Three fossil species are also recognized, each belonging to a separate genus.[4][5] The earliest fossil assigned to the Stenopodidea is Devonostenopus pennsylvaniensis from the Devonian.[5] Until D. pennsylvaniensis was discovered, the oldest known member of the group was Jilinicaris chinensis from the Late Cretaceous.[6]

The cladogram below shows Stenopodidea's internal relationships:[2]

Stenopodidea

Stenopodidae

	Macromaxillocarididae

	Spongicolidae

Stenopodidea comprises the following families and genera:

Macromaxillocarididae Alvarez, Iliffe & Villalobos, 2006
- Macromaxillocaris Alvarez, Iliffe & Villalobos, 2006
Spongicolidae Schram, 1986
- Engystenopus Alcock & Anderson, 1894
- Globospongicola Komai & Saito, 2006
- Jilinicaris † Schram, Shen, Vonk & Taylor, 2000
- Microprosthema Stimpson, 1860
- Paraspongicola De Saint Laurent & Cléva, 1981
- Spongicola De Haan, 1844
- Spongicoloides Hansen, 1908
- Spongiocaris Bruce & Baba, 1973
Stenopodidae Claus, 1872
- Devonostenopus † Jones et al., 2014
- Juxtastenopus Goy, 2010
- Odontozona Holthuis, 1946
- Phoenice † Garassino, 2001
- Richardina A. Milne-Edwards, 1881
- Stenopus Latreille, 1819

References

Raymond T. Bauer (2004). "What is a caridean shrimp?". Remarkable Shrimps: Adaptations and Natural History of the Carideans. Animal Natural History Series. Vol. 7. University of Oklahoma Press. pp. 3–14. ISBN 978-0-8061-3555-7.
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. PMC 6501934. PMID 31014217.
S. De Grave & C. H. J. M. Fransen (2011). "Carideorum Catalogus: the Recent species of the dendrobranchiate, stenopodidean, procarididean and caridean shrimps (Crustacea: Decapoda)". Zoologische Mededelingen. 85 (9): 195–589, figs. 1–59. ISBN 978-90-6519-200-4. Archived from the original on 2012-12-20.
Sammy De Grave; N. Dean Pentcheff; Shane T. Ahyong; et al. (2009). "A classification of living and fossil genera of decapod crustaceans" (PDF). Raffles Bulletin of Zoology. Suppl. 21: 1–109.
Wade T. Jones; Rodney M. Feldmann; Carrie E. Schweitzer; Frederick R. Schram; Rose-Anna Behr & Kristen L. Hand (2014). "The first Paleozoic stenopodidean from the Huntley Mountain Formation (Devonian–Carboniferous), north-central Pennsylvania". Journal of Paleontology. 88 (6): 1251–1256. doi:10.1666/13-059.
Frederick R. Shram; Shen Yanbin; Ronald Vonk & Rodney S. Taylor (2000). "The first fossil stenopodidean" (PDF). Crustaceana. 73 (2): 235–242. doi:10.1163/156854000504183.

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[Bauer_3_14-1] Raymond T. Bauer (2004). "What is a caridean shrimp?". Remarkable Shrimps: Adaptations and Natural History of the Carideans. Animal Natural History Series. Vol. 7. University of Oklahoma Press. pp. 3–14. ISBN 978-0-8061-3555-7.

[Wolfe2019-2] 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. PMC 6501934. PMID 31014217.

[Carideorum-3] S. De Grave & C. H. J. M. Fransen (2011). "Carideorum Catalogus: the Recent species of the dendrobranchiate, stenopodidean, procarididean and caridean shrimps (Crustacea: Decapoda)". Zoologische Mededelingen. 85 (9): 195–589, figs. 1–59. ISBN 978-90-6519-200-4. Archived from the original on 2012-12-20.

[Grave-4] Sammy De Grave; N. Dean Pentcheff; Shane T. Ahyong; et al. (2009). "A classification of living and fossil genera of decapod crustaceans" (PDF). Raffles Bulletin of Zoology. Suppl. 21: 1–109.

[Devonostenopus-5] Wade T. Jones; Rodney M. Feldmann; Carrie E. Schweitzer; Frederick R. Schram; Rose-Anna Behr & Kristen L. Hand (2014). "The first Paleozoic stenopodidean from the Huntley Mountain Formation (Devonian–Carboniferous), north-central Pennsylvania". Journal of Paleontology. 88 (6): 1251–1256. doi:10.1666/13-059.

[6] Frederick R. Shram; Shen Yanbin; Ronald Vonk & Rodney S. Taylor (2000). "The first fossil stenopodidean" (PDF). Crustaceana. 73 (2): 235–242. doi:10.1163/156854000504183.