Leptoplax Dall 1882
Creators
Description
Genus Leptoplax (Carpenter MS) Dall, 1882
Type species. Chiton coarctatus Sowerby, 1841, by monotypy.
Genus distribution. Western Pacific: Japan, Vietnam, Philippines, Indonesia, Papua New Guinea, New Caledonia, South Australia and Spratly Islands now.
Remarks. For a long time the genus Leptoplax was considered synonymous with the genus Notoplax. Finally, Gowlett-Holmes [2001] restored its generic status, although she did not provide a diagnosis. Sirenko and Saito [2017] presented a diagnosis of the genus. Here I give a somewhat refined distinction of Leptoplax from Notoplax.
The main characters of Leptoplax distinguishing it from Notoplax are: 1) absence of diagonal line on tegmentum of intermediate valves, running from lateral incision to apex and decorated with large pustules; 2) presence of ribs on ventral flattened spicules and more often on dorsal spicules and needles; 3) absence of asymmetry of central and first lateral teeth of radula.
In the new species, the anterior margin of the apophyses of the tail valve is not concave, so I remove this feature noted in Sirenko and Saito [2017] from the diagnosis of Leptoplax.
Notes
Files
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Acanthochitonidae
- Genus
- Leptoplax
- Kingdom
- Animalia
- Order
- Chitonida
- Phylum
- Mollusca
- Scientific name authorship
- Dall
- Taxon rank
- genus
- Taxonomic concept label
- Leptoplax Dall, 1882 sec. Sirenko, 2024
References
- Gowlett-Holmes K. L. 2001. Polyplacophora. In: Wells A., Houston W. W. K. (Eds.). Catalogue Zoological of Australia. Vol. 17.2. Mollusca: Aplacophora, Polyplacophora, Scaphopoda, Cephalopoda. CSIRO Publishing, Melbourne: 19 - 84.
- Sirenko B. I., Saito H. 2017. New species of chitons of the superfamily Cryptoplacoidea (Mollusca: Polyplacophora) from Vietnamese waters. Zootaxa, 4299: 451 - 506. DOI: 10.11646 / zootaxa. 4299.4.1