About the mitromorphid species group Anarithma lachryma (Reeve, 1845) (Conoidea Mitromorpha) at reef levels of Balicasag Island (Central Philippines)
In: Biodiversity Journal. Edizioni Danaus: Palermo. ISSN 2039-0394, more
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| Keywords |
Taxonomic status > New taxa > New species
Anarithma Iredale, 1916 [WoRMS]; Lovellona Iredale, 1917 [WoRMS]; Mitra lachryma Reeve, 1845 [WoRMS]; Mitromorpha P. P. Carpenter, 1865 [WoRMS]; Mitromorphidae T. L. Casey, 1904 [WoRMS]
Marine/Coastal |
| Author keywords |
Mitromorphidae; Anarithma; Mitromorpha; Lovellona; reef levels; Central Philippines; shell morphology; shell chromatic pattern; phenetic variability; characters heritability |
| Abstract |
Mitra lachryma (Reeve, 1845) (Conoidea Mitromorpha) is restored as type species of the genus Anarithma Iredale, 1916, and a series of eleven species ranging in Balicasag (Central Philippines) is proposed to belong to a restricted A. lachryma species group, composed of both planktotrophic and lecithotrophic species, all kind of intergrading situations being reported. Two new species are described in this species group, as A. bulbosa n. sp. and A. melvilli n. sp. The protoconch morphologies examined in the Anarithma complex are considered to reflect high plasticity and to support the hypothesis of a continuum in larval strategies, which contradicts binary taxonomies based on planktotrophic versus lecithotrophic protoconchs. The chromatic features of the teleoconch are considered to be more heritable and playing as better clue of the phyletic distances occurring in this group. Both competitors groups within the Anarithma complex and specific transitions to other mitromorphid genera are discussed. |
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