The Taxonomic Status of Actinocleidus Mueller, 1937; Anchoradiscus Mizelle, 1941; Clavunculus Mizelle et al., 1956; Anchoradiscoides Rogers, 1967; Syncleithrium Price, 1967 and Crinicleidus n. gen.: North American Ancyrocephalids (Monogenea) with Articulating Haptoral Bars

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Abstract
The ancyrocephalids (Monogenea) with articulated or fused transverse haptoral bars and which parasitize North American centrarchid fishes are reviewed. Actinocleidus Mueller, 1937, with A. oculatus (Mueller, 1934) Mueller, 1937, as type species, and A. articularis (Mizelle, 1936) Mueller, 1937; A. fergusoni Mizelle, 1938; A. brevicirrus Mizelle and Jaskoski, 1942; A. bifidus Mizelle and Cronin, 1943; A. recurvatus Mizelle and Donahue, 1944; A. georgiensis Price, 1966, and A. bennetti Allison and Rogers, 1970, as additional species, is redefined. A key to Actinocleidus spp. is provided. The followings due to inadequater description and/or absence of identifiable type material, are regarded as species inquirendae: A. gracilis Mueller, 1937; A. maculatus Mueller, 1937; A. flagellatus Mizelle and Seamster, 1939; A. okeechobeensis Mizelle and Seamster, 1939; A. subtriangularis Migelle and Jaskaski, 1942; A. bakeri Mizelle and Crownin, 1943; A. harquebus Mizelle and Cronin, 1943; A. gibbosus Mizelle and Donahue, 1944; A. incus Mizelle and Donahue, 1944. Anchoradiscus Mizelle, 1941, with A. anchoradiscus Mizelle, 1941, as type species, is redefined. Actinocleidus triangularis Summers, 1937, is, by the rule of tautonymy, regarded as a synonym of A. anchoradiscus. Clavunculus Mizelle, Stokely, Jaskoski, Seamster and Monaco, 1956, with C. bursatius (Mueller, 1936) Mizelle Stokley, Jaskoski, Seamster and Monaco, 1956, as type species and C. bifurcatus (Mizelle, 1941) Mizelle, Stokely, Jaskoski, Seamster and Monaco, 1956, as an additional species is redefined. Clavunculus unguis (Mizelle and Cronin, 1943) Mizelle, Stokely, Jaskoski, Seamster and Monaco, 1956 and Actinocleidus mizellei Hanek and Fernando, 1972 (in part) are regarded as synonyms of C. bursatus. A key to Clavunculus spp. is provided. Anchoradiscoides Rogers, 1967, with A. serpentinus Rogers, 1967, as type species, is redefined. Syncleithrium Price, 1967, with S. fusiformis (Mueller, 1934) Price, 1967, as type species, is redefined. Crinicleidus n. gen. is proposed to accommodate C. crinicirrus (Kritsky and Leiby, 1973) n. comb. as type species and C. longus (Mizelle, 1938) n. comb. as an additional species. The genera Actinocleidus, Anchoradiscus, Clavunculus and Anchoradiscoides are similar with respect to the male copulatory complex but are separated on the functional morphology of the sclerotized components of the haptor. Syncleithrium and Crinicleidus are characterized by each having a distinctive male copulatory complex, which is unlike that of the above listed genera as well as distinctive haptoral sclerites. The types of the male copulatory complexes of Syncleithrium and Crinicleidus are herein described for the first time.