Teratology in chitons (Mollusca, Polyplacophora): a brief summary
Dell'Angelo, B.; Schwabe, E. (2010). Teratology in chitons (Mollusca, Polyplacophora): a brief summary. Boll. Malacologico 46(1): 9-15
In: Bollettino Malacologico. Unione Malacologica Italiana: Milano. ISSN 0394-7149, more
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| Keywords |
Teratology
Chitonidae Rafinesque, 1815 [WoRMS]; Polyplacophora [WoRMS]
Marine/Coastal |
| Author keywords |
Polyplacophora, teratology, hypomerism, hypermerism, coalescence, splitting |
| Authors | | Top |
- Dell'Angelo, B.
- Schwabe, E.
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| Abstract |
The present paper provides an overview of the present stage of knowledge of chiton abnormalities, which are divided into four cases: hypomerism, hypermerism, coalescence and splitting. Representatives for each group are illustrated and in addition two new records for five and nine valved chitons are reported the first record of a hypomerized specimen of Tonicia elegans (Frembly, 1827), and the first occurrence of a hypermerized specimen of Tonicella zotini Jakovleva, 1952. With the new data, the number of five valved species increased to eight, while 10 species are now known with nine plates. In addition, the present paper summarizes the data available for chiton defects and other abnormalities, which do not fit the above mentioned categories. |
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