Two new deep-sea species of Argestidae and Ameiridae (Copepoda: Harpacticoida) from the Eastern Mexican Pacific and Gulf of California, with proposal of a new genus of the family Argestidae Author Gómez, Samuel text Journal of Natural History 2018 2018-12-01 52 41 - 42 2613 2638 http://dx.doi.org/10.1080/00222933.2018.1546915 journal article 10.1080/00222933.2018.1546915 1464-5262 5177794 4BD580B0-E856-4FBC-ABA6-B031A9B6E1F9 Genus Georgus gen. nov. Type species Bodinia peterrumi George 2004 , by monotypy. Diagnosis (based on the description of the type species by George (2004)) Argestidae . Habitus semi-cylindrical. Posterior margin of cephalothorax and free prosomites plain. P3-bearing somite with pair of conspicuous pores. Posterior margin of P5- bearing somite, genital somite, and free urosomites coarsely serrated. Genital somite and third urosomite distinct in both sexes. Anal somite square from dorsal view, with strongly chitinized area ( ‘ apron ’ ) ventrally. Caudal seta VII arising dorsally from conspicuous knob; caudal seta III shifted ventrally on distal fourth of ramus. Antennule sevensegmented in the female, with 10 segments and haplocer in the male. Antenna with allobasis; exopod one-segmented, small, with one seta. Mandibular palp biramous; basis with one seta; endopod one-segmented with four setae; exopod incorporated to basis and represented by one seta. Exopod and endopod of the maxillule incorporated into basis, with five setae in all. Syncoxa of maxilliped with two setae. P1 with threesegmented exopod and two-segmented endopod; endopod non-prehensile, longer than exopod; armature formula of exopod/endopod 0,1,023/1,220; P2 – P4 EXP and ENP three-segmented, exopod longer than endopod; P2 – P4 EXP1 and ENP1 with inner seta; P2 – P3 EXP2 and ENP2 with inner seta; P4 EXP2 with, ENP2 without inner seta; armature formula of P2 – P4 EXP3 / ENP3 , 223 /121, 223/121, and 123/121, respectively (note that the legs in George ’ s (2004, p. 254) figure 10a,b are not P2 and P3 as in the legend, but P3 and P4, respectively, and that in the text and in George ’ s (2004) figure 10b the P4 ENP2 is described without inner seta, but his table ( George 2004 , p. 249) shows an inner seta on this segment) . Female P5 endopodal lobe poorly developed, with three setae, exopod with five setae and a subapical, inner, long tube pore. Male P5 with endopodal lobe poorly developed bearing one seta; exopod with five setae, and one subapical, inner, long tube pore. Etymology The genus is dedicated to Dr Kai Horst George for his contribution to the knowledge of the Argestidae . The name is a noun in the nominative singular, gender masculine. Remarks See below.