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Le, D. D.; Akira, T.; Hayato, T. (2016). Ontogenetic changes of the maxillula in Loxoconcha (Crustacea, Ostracoda, Podocopida), with a description of a new species from the Okinawa Islands (Japan). Zoologischer Anzeiger - A Journal of Comparative Zoology. 262: 43-56.
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10.1016/j.jcz.2016.03.009 [view]
Le, D. D.; Akira, T.; Hayato, T.
2016
Ontogenetic changes of the maxillula in Loxoconcha (Crustacea, Ostracoda, Podocopida), with a description of a new species from the Okinawa Islands (Japan)
Zoologischer Anzeiger - A Journal of Comparative Zoology
262: 43-56
Publication
Available for editors [request]
The ontogenetic changes of the maxillula in Loxoconcha noharai Le and Tsukagoshi, 2014 from the second
instar (A-7) through to the adult are described. The general development and number of setae on the
maxillula of L. noharai are the same as L. japonica Ishizaki, 1968 from the second (A-7)to the fourth instars
(A-5), but differences in these characters are found between the two species in and after the fifth instar (A?4). The number of setae on the endites and endopodite of the maxillula of L. noharai reaches a maximum
in the pre-adult stage A-1, whereas in other species, it continuously increases throughout all ontogenetic
stages. The maxillula of L. noharai bears fewer setae and claws throughout ontogeny compared with other
species in different superfamilies. This tendency reflects possible paedomorphic evolution in L. noharai.
In addition, the new species Loxoconcha yoshidai sp. nov., from the Okinawa Islands, southern Japan,
is described herein. The distribution pattern of pore systems below the eye tubercle, which is used to
divide the genus Loxoconcha into groups, shows that this new species has an unstable intermediate state
between Groups B and C
Japan
Paleontology, Fossils, Paleobiology
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Loxoconcha yoshidai Dung, Tsukagoshi & Tanaka, 2016 (original description)