Leptochiton rissoi ( Nierstrasz, 1905 )
publication ID |
https://doi.org/ 10.35885/ruthenica.2023.33(2).4 |
DOI |
https://doi.org/10.5281/zenodo.11172628 |
persistent identifier |
https://treatment.plazi.org/id/1B1DC90A-E808-0653-3BDC-F8361276F85F |
treatment provided by |
Felipe |
scientific name |
Leptochiton rissoi ( Nierstrasz, 1905 ) |
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Leptochiton rissoi ( Nierstrasz, 1905) View in CoL
Lepidopleurus rissoi Nierstrasz, 1905: 6 View in CoL , figs 5, 52–55; Ferreira, 1979: 163, figs 30–32.
LLeptochiton (Leptochiton) rissoi . – Kaas, Van Belle, 1985: 110, fig. 48, map 24.
Type material. Lectotype ( ZMA.MOLL 138601), designated by Ferreira, 1979.
Type locality. Celebes Sea , N of Manado, Indonesia, 3°27.1’N 125°18.7’E, 2053 m ( Siboga, St. 126) GoogleMaps .
Distribution. Indian Ocean (off Sumatra Island), Pacific Ocean, Philippines, Indonesia, New Guinea, Solomon Islands, 875–2120 m, more common deeper than 1000 m.
Remarks. The following morphological features of the lectotype were not mentioned in Nierstrasz [1905] and Kaas and Van Belle [1985]: the head valve is 1.2 times wider than the tail valve; the apophysis of the valve V is 1.3 times wider than the jugal sinus; the tegmentum granules are oval on the central area and round on the lateral areas with one megalaesthete and 6 micraesthetes; The head of the major lateral tooth of the radula is bidentate instead of unidentate as mentioned in Kaas, Van Belle [1985].
A study of the lectotype of this species ( ZMA. MOLL 138601) and other available specimens indicate that the number of aesthetes in an aesthete group ranges from 6 to 20, regardless of body size. This variability together with a longitudinal arrangement of the granules is similar to L. vietnamensis Sirenko, 1998 . The main difference between both species is the ratio of the width of the apophysis to the width of the jugal sinus, which is always greater than 1 in L. rissoi (vs less than 1 in L. vietnamensis ).
ZMA |
Universiteit van Amsterdam, Zoologisch Museum |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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SubClass |
Neoloricata |
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Family |
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Genus |
Leptochiton rissoi ( Nierstrasz, 1905 )
Sirenko, B. I. 2023 |
LLeptochiton (Leptochiton) rissoi
Kaas P. & Van Belle, R. A. 1985: 110 |
Lepidopleurus rissoi
Nierstrasz H. F. 1905: 6 |