Similar Partula
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Stylommatophora
Family: Partulidae
Genus: Partula
Species:
P. affinis
Binomial name
Partula affinis
Pease, 1868
Synonyms

Partula otaheitana affinis

Partula affinis is a species of partulid within the genus Partula. The species is rarely referred to as the similar partula[1], and is endemic to Tahiti.

Distribution

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P. affinis' historical distribution represents almost all of Tahiti, but now its modern distribution includes only one population in Tahiti Iti, making it now considered a single valley endemic.[2]

Captive breeding

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P. affinis is in the international Partula breeding program and the conservation efforts for this species have been very successful, allowing reintroductions since 2015.[3]

Phylogeny

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Phylogenetic analyses confirmed that P. affinis is the sister species of P. otaheitana.[4]

Taxonomy

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P. affinis was originally described as a subspecies of P. otaheitana (P. otaheitana affinis) but is now recognized as a distinct species.

Original description

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The original description is available online here.

Original description of P. affinis
PARTULA AFFINIS, Pease.

Description.—T. elongato-ovata, solidiuscula, haud nitens,

compresse umbilicata, dextrorsa; anfr. 5, plano-convexis, ultimus

2 longitudinis teste subeequans, sutura impressa, interdum sub-

marginata; longitudinaliter tenui rugosim irregulariter striats

transversim minutissime striata; apertura ovata; labro angu*te

calloso, interdum margine columellari adnato; columella den

tata; castanea, interdum longitudinaliter straminea strigata, 10°

omnino straminea.

Var.; fasciis tribus fuscis cingulata.

Dimensions.—Long. 16, diam. 9 mill.

Habitat.—Tahiti.

Shell elongately ovate, rather solid, compressly umbilicate,

dextral, finely, roughly and irregularly striated longitudinally,

transversely very minutely striate, sutures impressed, sometimes

faintly marginated; lip narrowly thickened, occasionally con-

nected with the columella by a thin callosity ; columella dentate.

Color light or dark chestnut brown, sometimes striped with

darker or wholly of a straw color.

Var.; encircled with three dark reddish brown bands, on

middle of last whorl, at the umbilicus, and just beneath the

suture.

Observations.—The above species is allied to P. Otaheitana.

It is, however, smaller and less elongate.

References

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  1. ^ "Similar Partula (Partula affinis)". iNaturalist.
  2. ^ "Partula affinis". IUCN Red List.
  3. ^ "Tentacle 24" (PDF). University of Hawaii.
  4. ^ "Evolutionary history of a vanishing radiation: isolation-dependent persistence and diversification in Pacific Island partulid tree snails". DNB.info.