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1894, Charles Chilton, “The Subterranean Crustacea of New Zealand”, in Transactions of the Linnean Society of London, 2nd Series, Volume VI: Zoology, Linnean Society of London, page 219:
Although Crangonya evidently comes very close to Niphargus, it appears to be a good genus, and to differ constantly from Niphargus in the more robust body and in the telson, which is always entire and never cleft as in Niphargus.
The basic number of segments in the abdomen is eleven plus the postsegmental telson which bears the anus, although Matsuda (1976) regards the telson as a twelfth segment.
2022, Russell D. C. Bicknell et al., “Applying Records of Extant and Extinct Horseshoe Crab Abnormalities to Xiphosurid Conservation”, in John T. Tanacredi et al., editors, International Horseshoe Crab Conservation and Research Efforts: 2007-2020, Springer, page 88:
The two documented examples of telson abnormalities are on juvenile moults (Fig. 2a, b).
