Morphological and molecular characterization of two new species of Andracantha (Acanthocephala: Polymorphidae) from New Zealand shags (Phalacrocoracidae) and penguins (Spheniscidae) with a key to the species
Por:
Presswell, B., Garcia-Varela, M., Smales, L. R.
Publicada:
1 nov 2018
Resumen:
Two new species of Andracantha (Polymorphidae) are described from the
intestine of the shags Leucocarbo chalconotus (Gray) and Phalacrocorax
punctatus (Sparrman), and the penguin Eudyptula minor (Forster) from
southern South Island, New Zealand. Andracantha leucocarboi n. sp. is
distinguished from its congeners by having no genital or ventral trunk
spines, but possessing a scattering of small spines between the anterior
fields of spines. This is the first record of a species of Andracantha
from a penguin. Circumbursal papillae are illustrated in a scanning
electron micrograph for the first time in the polymorphids. Andracantha
sigma n. sp. is distinguished by the sigmoid shape of its largest
proboscis hook, hook VIII, and having the ventral field separated from
the posterior disc field by an aspinous gap. A Maximum Likelihood tree
from cox1 and large ribosomal subunit (LSU) data shows A. leucocarboi n.
sp. to be more closely related to A. gravida than A. sigma n. sp. and
the genus Andracantha as sister to Corynosoma spp. Genetic distances
between species of Andracantha are comparatively large. A key to the
species of Andracantha is provided.
Filiaciones:
Presswell, B.:
Univ Otago, Dept Zool, POB 56, Dunedin, New Zealand
Garcia-Varela, M.:
Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Smales, L. R.:
South Australian Museum, North Terrace, Adelaide, SA 5070, Australia
|