著者

Toshiro SARUWATARI Masamitsu IWATA Yoshitaka YABUMOTO Frensley D. HUKOM Teguh PERISTIWADY Yoshitaka ABE

出版者

Kitakyushu Museum of Natural History and Human History

雑誌

北九州市立自然史・歴史博物館研究報告A類(自然史) (ISSN:13482653)

巻号頁・発行日

vol.17, pp.67-80, 2019-03-31 (Released:2020-09-15)

参考文献数

11

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Seventh specimen of Indonesian coelacanth, Latimeria menadoensis POUYAUD et al., 1999 was caught off Sulawesi, Indonesia on November 5, 2014. This specimen is a female, 1276 mm in standard length. Counts and measurements on the external morphology of the specimen was carried out by a team of Japanese and Indonesian researchers, providing the most comprehensive data on the morphology of this species. All available data on morphology of L. menadonesis is compiled together to provide insights into the biology and taxonomy of extant coelacanths.

著者

Masamitsu IWATA Yoshitaka YABUMOTO Toshiro SARUWATARI Shinya YAMAUCHI Kenichi FUJII Rintaro ISHII Toshiaki MORI Frensly D. HUKOM DIRHAMSYAH Teguh PERISTIWADY Augy SYAHAILATUA Kawilarang W. A. MASENGI Ixchel F. MANDAGI Fransisco PANGALILA Yoshitaka ABE

出版者

Kitakyushu Museum of Natural History and Human History

雑誌

北九州市立自然史・歴史博物館研究報告A類(自然史) (ISSN:13482653)

巻号頁・発行日

vol.17, pp.57-65, 2019-03-31 (Released:2020-09-15)

参考文献数

16

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The juvenile of Indonesian coelacanth, Latimeria menadoensis is here described for the first time in detail with comparison to embryos of Latimeria chalumnae. The juvenile was found in free swimming at 164.6 m depth off Manado, Indonesia on the 6th October in 2009. Because the total length of the juvenile is 31.5 cm, which is smaller than the embryos of L. chalumnae, it is speculated that not much time has passed from its birth. The depth at which the juvenile was found is within the range of the depth where adult L. menadoensis were observed, hidden in a narrow and long overhang where large predators could not enter. The juvenile has a more slender body, smaller orbit, shorter and deeper posterior part of the body (caudal peduncle) between the second dorsal and the anal fins and anterior ends of the dorsal and ventral lobes of the caudal fin (the third dorsal and second anal fins), longer dorsal and ventral lobes of the caudal fin (the third dorsal and second anal fins), broader peduncles of broader lobed fins, larger first dorsal fin and longer supplementary lobe of the caudal fin (caudal fin) than embryos of L. chalumnae. This indicates clear differences in the first ontogenetic stages of the two species, although adults have almost the same morphological features. Latimeria menadoensis appears to reproduce in a rather confined area, because both the juvenile and adults have been found within the same area inside of Manado Bay.

著者

Camila CUPELLO Gaël CLÉMENT François J. MEUNIER Marc HERBIN Yoshitaka YABUMOTO Paulo M. BRITO

出版者

Kitakyushu Museum of Natural History and Human History

雑誌

北九州市立自然史・歴史博物館研究報告A類(自然史) (ISSN:13482653)

巻号頁・発行日

vol.17, pp.29-35, 2019-03-31 (Released:2020-09-15)

参考文献数

38

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The evolutionary history of coelacanths is long and complex with indications of adaptations to different aquatic environments. Fossil coelacanths are registered in shallow brackish, fresh or marine waters, while extant coelacanths inhabit moderate deep marine environments. Here we review some evidences of this long-time adaptation to moderate deep waters, focusing mainly on the hypothesis of bimodal respiration (gas exchange through gills and lungs) in most fossil coelacanths and on the aquatic gas exchange and the presence of a non-functional lung in the extant coelacanth Latimeria chalumnae. Another morphological evidence is the high rate of lipid accumulation in the whole body of L. chalumnae.