Out on a limb: novel morphology and position on appendages of two new genera and three new species of ectoparasitic isopods (Epicaridea: Dajidae) infesting isopod and decapod hosts Author Williams, Jason D. Department of Biology, Hofstra University, 1000 Hempstead Turnpike, Hempstead, NY 11549 (USA) jason. d. williams @ hofstra. edu (corresponding author) Author Boyko, Christopher B. Department of Biology, Hofstra University, 1000 Hempstead Turnpike, Hempstead, NY 11549 (USA); and Division of Invertebrate Zoology, American Museum of Natural History, 200 Central Park West, New York, NY, 10024 (USA) cboyko @ amnh. org cboyko@amnh.org text Zoosystema 2021 2021-02-16 43 4 79 100 journal article 8090 10.5252/zoosystema2021v43a4 f5c1cc3b-055c-41a7-8b9b-80a136141bad 1638-9387 4555463 urn:lsid:zoobank.org:pub:4F2A16F1-B100-4236-AD31-945896D6F910

TABLE 2. — Comparative characters of males in the 20 genera of Dajidae G. O. Sars, 1883 (five genera have no described males: Antephyra Schultz, 1978, Prophryxus Richardson, 1909, and Streptodajus Nierstrasz & Brender à Brandis, 1923 are known from females only; species of Dolichophryxus Schultz, 1977 and Paraspidophryxus Schultz, 1977 are known from cryptoniscus larvae only).

			Terminal
			pereomere	Number of
	Antennule	Antennae	fused with first pereopod Number of
Genus	(= antenna 1)	(= antenna 2)	pleomere	pairs	pleomeres	Uropods
Aegophila Bresciani, 1966	Single lobe	2 or 4 segments	No	7	1 (fused)	No
Akrophryxus n. gen.	3? segments	Single lobe	Yes	6	1 (fused)	No
Allophryxus Koehler, 1911	Single lobe?	5 segments	No	7	4 (partly fused) Rudimentary
Arthrophryxus Richardson, 1908	Unknown	Unknown	No	7	6	No
Aspidophryxus G. O. Sars, 1883	1 or 2 segments	8 or 9 segments	No	7	1 (fused)	Yes
Branchiophryxus Caullery, 1897	Rudimentary	9 segments	Unknown	7	1 (fused)	No
	(1 segment?)
Colophryxus Richardson, 1908	Unknown	Unknown	No	7	5 or 6	No
Dajus Krøyer, [1842]	Rudimentary	9 segments	No	7	1 (fused)	Rudimentary
	(1 segment?)
Heterophryxus G. O. Sars, 1885	1-3 segments	5 segments	No	7	1 (fused)	No
Holophryxus Richardson, 1905	1-3 segments	Longer, 1-3 segments? Yes		7	1	No
Notophryxus G. O. Sars, 1883	1 or 2 segments	5 or 6 segments	No	7	1 (fused)	No
Oculophryxus Shields & Gómez-	2 segments	5 segments	Yes	7	1	No
Gutiérrez, 1996
Prodajus Bonnier, 1903	2 segments	5 or 6 segments	No	7	1 or 2	Yes
						(biramous)
Telephryxus n. gen.	1 large segment	2 segments	No	6 + reduced 1 (fused)		No
				pair
Zonophryxus Richardson, 1904	1 segment	6 segments	No	7	1 (fused)	No