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Thalassinidea is an infraorder of decapod crustaceans that live in burrows. Recent molecular analyses have shown this group to be most closely related to Brachyura (crabs) and Anomura (hermit crabs and their allies). The monophyly of the group is not certain; recent studies have suggested dividing the group into two infraorders, Gebiidea and Axiidea..
There are believed to be 556 extant species of thalassinideans in 96 genera, with the greatest diversity in the tropics, although with some species reaching latitudes above 60° north. About 95% of species live in shallow water, with only three taxa living below 2,000 metres. - Wikipedia
 Sammy De Grave, N. Dean Pentcheff, Shane T. Ahyong et al. (2009). "A classification of living and fossil genera of decapod crustaceans". Raffles Bulletin of Zoology Suppl. 21: 1–109.
 Peter C. Dworschak (2005). "Global diversity in the Thalassinidea (Decapoda): an update (1998-2004)". Nauplius 13 (1): 57–63.
 Peter C Dworschak (2000). "Global diversity in the Thalassinidea (Decapoda)". Journal of Crustacean Biology 20: 238–243.
The Recent genus Callianassa Leach is known from the Kimmeridgian, as well as from the Cretaceous and Tertiary. Thalssian Latreille is Tertiary and Recent.Zittel & Eastman 1913 (public domain) - needs updating
The following dendrogram is abbreviated from the one by Christopher Taylor - Variety of LIfe MAK120522
[B55] Bott, R. 1955. Dekapoden (Crustacea) aus El Salvador. 2. Litorale Dekapoden, außer Uca. Senckenbergiana Biologica 36: 45-70.
[CA04] Casadío, S., A. de Angeli, R. M. Feldmann, A. Garassino, J. L. Hetler, A. Parras & C. E. Schweitzer. 2004. New decapod crustaceans (Thalassinidea, Galatheoidea, Brachyura) from the Middle Oligocene of Patagonia, Argentina. Annals of Carnegie Museum 73 (2): 25-47.
[CF06] Crawford, R. S., R. F. Feldmann, D. A. Waugh, B. M. Kelley & J. G. Allen. 2006. Decapod crustaceans from the Maastrichtian Fox Hills formation. Bulletin of the Peabody Museum of Natural History 47 (1-2): 3-28.
[DAS03] Dixon, C. J., S. T. Ahyong & F. R. Schram. 2003. A new hypothesis of decapod phylogeny. Crustaceana 76: 935-975.
[MD01] Martin, J. W., & G. E. Davis. 2001. An updated classification of the Recent Crustacea. Natural History Museum Los Angeles County, Science Series 39: 1-124.
Thalassinidea Latreille, 1831
From the Jurassic
Phylogeny: Eureptantia : Astacura + Palinuroidea + Meiura + *
Comments: The position of the Thalassinidea, and whether they are even monophyletic, is controversial. In some phylogenies, they are basal Reptantia, in others, intermediate between lobsters and crabs and crab-like forms. MAK120531