New records of Philometra spp. (Nematoda: Philometridae) from marine perciform fishes off Florida, USA, including descriptions of two new species

摘要

Recent examinations of marine perciform fshes from o? the Florida coast in the Gulf of Mexico and Straits of Florida, USA,revealed the presence of the following six species of Philometra Costa, 1845 (Nematoda: Philometridae): P. haemulontis sp. n. (malesand females) from the ovary of Haemulon plumierii (Lacepède) (type host) and H. aurolineatum Cuvier (both Haemulidae); Philometrasynagridis Moravec, Bakenhaster et Fajer-ávila, 2014 (males and females) from the ovary and testes of Lutjanus synagris (Linnaeus)(Lutjanidae); P. margolisi Moravec, Vidal-Martínez et Aguirre-Macedo, 1995 (male) from the ovary of Hyporthodus nigritus (Holbrook) (Serranidae) (new host record; probably a paradefnitive host); P. andersoni sp. n. (male) from the ovary of H. nigritus; Philometrasp. 1 (male) from the ovary of Rhomboplites aurorubens (Cuvier) (Lutjanidae); and Philometra sp. 2 (females) from the subcutaneoustissue of the anterior-most head sinuses of Hyporthodus niveatus (Valenciennes) (Serranidae). Specimens of species are described andillustrated based on light and (except for Philometra sp. 1) scanning electron microscopical examinations. Philometra haemulontissp. n. di?ers from all congeners in the unique structure of the gubernaculum, whereas P. andersoni sp. n. can be di?erentiated fromother gonad-infecting congeners parasitising the Serranidae by a combination of morphological features. Females of P. synagridis aredescribed for the frst time. Gravid females of Philometra sp. 2 are similar to those of P. morii Moravec, Bakenhaster et Fajer-ávila,2010, a subcutaneous parasite of Epinephelus morio (Valenciennes) (Serranidae) in the Gulf of Mexico.