Lunules can develop in one of two positions, along the midline of ambulacra, or along the midline of the posterior interambulacrum, between the peristome and periproct (the anal lunule). Ambulacral ...
Avoir ou ne pas avoir de lunules : l'effet du hasard Située à l’opposé du bord libre de l’ongle de main ou de pied, la lunule est remarquable par sa couleur blanchâtre et sa forme demi ...
197. Harold & Telford (1990) give an excellent review of this genus together with a key to the species. It differs from Leodia in having no lunule in the anterior ambulacrum (see Mooi & Peterson 2000 ...
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