0o天空o0 wrote: 6. size approx : 25mm

胡兄:

剛好想問文正大哥撿到的這隻岩螺，總覺得他不是泛泛之貝耶，想知道您的看法

這種殼, 我在鼻頭南岸, 馬崗九孔池共撿過3個, 據李昭慶的說法, 都是塔岩螺.

外型要像4200種的描述, 產於印度洋的塔岩螺, 我只在石門撿過一次, 又是個死殼, 所以也不確定, 是否台灣真有產那種型的.

0o天空o0 wrote: 4. size approx : 10mm , 不常見

可能是 Otopleura nitida (A. Adams, 1854)

或 Otopleura mitralis (A. Adams, 1854)

我把原始文獻調出來，請大家看一下，到底是哪一種? 圖9: mitralis, 圖11: nitida

mitralis 大一點約2公分多，nitida 小一點約1公分多，因為天空兄的標本只有1公分又是幼貝，所以不好判斷


https://www.biodiversitylibrary.org/page/11076023#page/563/mode/1up

我是比較偏向nitida，如果真是nitida，那台灣就有這兩種的記錄了
forum_posts.asp?TID=1764

mitralis 的文字描述如下
P. testa clongato-pyramidali, albida, rufo-fusco variegatai; an-
fractibus octo, convexiusculis, longitudinaliter costatis, costis pro-
minentibus, subdistantibus, interstitiis transversim liratis 3 aper-
turd obliqud, semiovati, anticé subcanaliculaté; columella plicis
tribus, plicé postica, transversi, magna.

A mitriform species, variegated with rufous, and with prominent,
distant, longitudinal ribs, transversely striated in the interstices.

St. Estevan, North Ilocos, isle of Luzon; sand, low water.
H.C. (Mus. Cuming.)
https://www.biodiversitylibrary.org/page/11076023#page/544/mode/1up


nitida 的文字描述如下
P. testa ovato-pyramidali, alba, nitida; anfractibus convexius-
culis, longitudinaliter costellatis, costellis angustis, rectis, subdis-
tantibus, levibus, interstitiis subcrenulatis, anfractu ultimo basi
producto; aperturd obliqué, semiovatd, anticé subcanaliculata ;
columella plicis tribus instructa, plici antici duplicata.

A rather small, shining species, with narrow, straight ribs,
rather wide apart, and with the interstices crenulated; the last
whorl is produced at the base, and the anterior fold of the colu-
mella is double.

Philippines. (Mus. Cuming.)
https://www.biodiversitylibrary.org/page/11076023#page/545/mode/1up

Edited by bill on 08-January-2026 at 9:43am

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