Inferring the developmental basis of the sea star abnormality "double ambulacral groove" (Echinodermata: Asteroidea) Inferencia sobre la base de desarrollo en estrellas de mar de la anormalidad "doble surco ambulacral" (Echinodermata: Asteroidea)
Very rarely a ray of a sea star is unusually wide and has two parallel ambulacral grooves that extend to a single tip. Such a ray has two terminal plates that are coalesced laterally. This abnormality is inferred to develop as a rare result of regeneration because it is recorded from a species with...
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| Format: | Article |
| Language: | English |
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BMC
2000-12-01
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| Series: | Revista Chilena de Historia Natural |
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| Online Access: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000400003 |
| Summary: | Very rarely a ray of a sea star is unusually wide and has two parallel ambulacral grooves that extend to a single tip. Such a ray has two terminal plates that are coalesced laterally. This abnormality is inferred to develop as a rare result of regeneration because it is recorded from a species with obligate asexual reproduction (fission and regeneration of halves; no gametes). This conclusion is supported also by an example where the abnormality affects only the distal third of a ray<br>Muy raramente un rayo de estrella de mar es desproporcionadamente ancho y tiene dos surcos ambulacrales paralelos que se extienden hasta su único extremo. Dicho rayo tiene dos placas terminales que coalecen lateralmente. Se ha inferido que esta anormalidad se desarrolla como un resultado raro de regeneración, porque se describe de una especie con reproducción asexual obligada (fisión y regeneración de mitades; no gametos). Además, esta conclusión se sostiene por un ejemplo de anormalidad que afecta sólo el tercio distal de un rayo |
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| ISSN: | 0716-078X 0717-6317 |