342 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



176. Leurodera decora Linton, 1910. 



Hosts: Anisotremus virginicus, Porkfish; 

 Brachygenys chrysargyreus, Bronze grunt; 

 Haemulon carbonarium, Caesar grunt; 

 H. parra, Sailor's choice; H. plumieri. 

 White grunt; H. sciurus, Yellow grunt; 

 H. flavolineatum, French grunt; Lutjanus 

 griseus, Gray snapper; Acanthurus hepatus 

 (?), Doctor fish. 



177. Theletrum fustifor?ne Linton, 1910. 



Host: Pomacanlhus arcualus, Black angelfish. 



Reported also from P. arcuatus and P. 

 paru, French angelfish, from the north 

 coast of Cuba by Vigueras (1940a). 



178. Derogenes cassus Manter, 1949. 



Host: Callionymus agassizii. 



179. Derogenes various (Mueller, 1784) Looss, 1901. 



Hosts: Helicolenus maderensis; Merluccius 

 sp.; Scorpaena cristulata; Setarches par- 

 matus; Urophycis regius. 



180. Gonocerca crassa Manter, 1934. 



Hosts: Ancylopsetla dilecta; Brotnla barbata; 

 Coelorhynchus carminatus; Lophius pis- 

 catorius; Merluccius sp.,; M. bilinearis; 

 Paralichthys oblongus; Paralichlhys sp.; 

 P. squamilentus; Phycis cirratus; Saurida 

 normani; Setarches parmalus; Synodontid; 

 Synodus intermedins; Urophycis regius. 



181. Gonocerca phycidis Manter, 1925. 



Hosts: Coelorhynchus carminatus. Grenadier; 

 Merluccius sp. ; Urophycis regius. 



182. Gonocercella attantica Manter, 1940. 



Host: Monacanlhus hispidus, Filefish. 



183. Parasterrhurus anurus Manter, 1934. 



Host: Argentina striata. 



184. Hemiperina nicolli Manter, 1934. 



Hosts: Chaunax pictus, Frogfish; Dibranchus 

 atlanlicus; Diplacanthopoma brachysoma. 



185. Hysterolecitha rosea Linton, 1910. 



Hosts: Acanthurus bahianus, Ocean tang; 

 A. caeruleus, Blue tang; A. hepatus, 

 Doctor fish. 



186. Macradena perfecta Linton, 1910. 



Host: Acanthurus caeruleus, Blue tang. 



187. Macradenina acanthuri Manter, 1947. 



Host: Acanthurus caeruleus, Blue tang. 



188. Opisthodena dimidia Linton, 1910. 



Hosts: Kyphosus sectatrix, Bermuda chub; 

 K. incisor. Yellow chub. 



189. Dictysarca virens Linton, 1910. 



Host: Gymnothorax funebris, Black moray' 



190. Hirudinella ventricosa (Pallas, 1774) Baird, 



1853. 

 Host: Coryphaena hippurus, Dolphin. 



191. Sclerodistomum sphoeroidis Manter, 1947. 



Host: Sphoeroides spengleri, Southern puffer 



192. Tetrochetus coryphaenae Yainaguti, 1934. 



Host: Coryphaena hippurus, Dolphin. 



193. Prosogonotrema bitabiatum Vigueras, 1940. 



Host: Ocyurus chrysurus, Yellowtail. 

 Reported from north coast of Cuba by 



Vigueras (1940b). 

 Vigueras considered it in a new family. 



Family APOROCOTYLIDAE 



194. Deontacylii ovalis Linton, 1910. 



Hosts: Kyphosus sectatrix, Bermuda chub; 

 K. incisor, Yellow chub. 



195. Cardicola cardiocolum (Manter, 1947) Short, 



1953. 



196. Cardicola laruei Short, 1953. 



Host: Cynoscion arenarius. White trout; 

 C. nebulosus, Speckled trout. 



HOST SPECIFICITY OF TREMATODES OF 

 MARINE FISHES OF THE GULF OF 

 MEXICO 



Monogenea are rather highly specific in regard 

 to their hosts. Most species are known to infect 

 m nature only a single host species. If there are 

 several hosts they are usually related. 



Host specificity among the Digenea varies con- 

 siderably. It is not marked among a number of 

 species infecting birds and mammals. Judging 

 from the collection records at Tortugas, trema- 

 todes of fishes there have very considerable host 

 specificity. Considered from the species level of 

 189 species collected (Manter 1947) 105 or 55.5 

 percent were found in only 1 species of host; 

 43 from 2 hosts, 14 from 3 hosts, etc., although 1 

 species occurred in 14 hosts, 1 in 16 hosts, and 1 in 

 21 hosts. While it must be admitted that non- 

 occurrence of a trematode within a certain species 

 of host does not necessarily mean it cannot infect 

 that host, data derived from numerous examina- 

 tions mdicate rather clearly that such species 

 do not do so under natural conditions. The 

 fishes studied were mostly shallow-water species 

 livmg not far from one another. The fact that a 

 few species do in fact infect a wide variety of 

 hosts indicates that food habits are not necessarily 

 a barrier. The only experimental testing of host 

 specificity in this region was that by McCoy (1930) 

 who found that Hamacreadium mutabite and H. 

 gulella developed only in three species of the 

 snapper family, Lutjanidae, and did not infect 



