TY - JOUR
T1 - Oculophryxus bicaulis, a new genus and species of dajid isopod parasitic on the euphausiid Stylocheiron affine Hansen
AU - Shields, Jeffrey D.
AU - Gómez-Gutiérrez, Jaime
N1 - Funding Information:
Markham provided fruitful discussion. Dr Niel Bruce improved the manuscript. We are grateful to the crew of the RV El Puma for their excellent cooperation. This research was supported, in part, by funds provided by the Direction de Estudios de Posgrado e Investigation (DEPI 903361, DEPI 931318) and by the Consejo National de Ciencia y Tecnologia (CONACyT D112-904620). JGG was supported by COFAA-IPN and SNI fellowships.
PY - 1996/3
Y1 - 1996/3
N2 - A new genus and species of dajid isopod is described from the euphausiid Stylocheiron affine Hansen. The isopod is a member of the Dajidae Kroyer, 1842, which are ectoparasites of shrimp, mysids, and krill. Tile female of the new genus and species is unique in its attachment to the eyestalk of its euphausiid host. The well-developed antennae encircle the eye peduncles of the host. The parasite presumably feeds by sucking blood directly from the head of the euphausiid. The new genus can be distinguished from other genera by the elongate, spoon-shaped antennae, the number of pereopods, and the indistinct abdomen. The male parasite attaches to the posterior of tile female near the margin of the marsupium. The male can be distinguished from other genera by the rudimentary 7th pereopod. Epicaridia, microniscus and cryptoniscus larvae were not observed. The parasite was found in samples taken during 7 oceanographic surveys made along the west coast of Baja California. The parasite was found on the furciliae, juveniles, and immature males and females of S. affine. Female isopods may castrate their hosts as none of the infected hosts (n = 27) had reached maturity. Of the 3 eco-phenotypes of S. affine that are found in the region, the isopod apparently prefers the California Current morph. However, in the Gulf of Mexico, a similar parasite was found on S. longicorne Sars.
AB - A new genus and species of dajid isopod is described from the euphausiid Stylocheiron affine Hansen. The isopod is a member of the Dajidae Kroyer, 1842, which are ectoparasites of shrimp, mysids, and krill. Tile female of the new genus and species is unique in its attachment to the eyestalk of its euphausiid host. The well-developed antennae encircle the eye peduncles of the host. The parasite presumably feeds by sucking blood directly from the head of the euphausiid. The new genus can be distinguished from other genera by the elongate, spoon-shaped antennae, the number of pereopods, and the indistinct abdomen. The male parasite attaches to the posterior of tile female near the margin of the marsupium. The male can be distinguished from other genera by the rudimentary 7th pereopod. Epicaridia, microniscus and cryptoniscus larvae were not observed. The parasite was found in samples taken during 7 oceanographic surveys made along the west coast of Baja California. The parasite was found on the furciliae, juveniles, and immature males and females of S. affine. Female isopods may castrate their hosts as none of the infected hosts (n = 27) had reached maturity. Of the 3 eco-phenotypes of S. affine that are found in the region, the isopod apparently prefers the California Current morph. However, in the Gulf of Mexico, a similar parasite was found on S. longicorne Sars.
KW - Dajidae
KW - Eastern Pacific
KW - Epicaridea
KW - Euphausiacea
KW - Isopod
KW - Oculophryxus bicaulis
KW - Parasite
KW - S. Longicorne
KW - Stylocheiron affine
KW - Taxonomy
UR - http://www.scopus.com/inward/record.url?scp=0342468824&partnerID=8YFLogxK
U2 - 10.1016/0020-7519(95)00126-3
DO - 10.1016/0020-7519(95)00126-3
M3 - Artículo
SN - 0020-7519
VL - 26
SP - 261
EP - 268
JO - International Journal for Parasitology
JF - International Journal for Parasitology
IS - 3
ER -