Two New Capulus from the Philippines (GASTROPODA: CAPULIDAE)

菲律賓近海兩個偏蓋螺新種之研究

黃式毅(Shih-I Huang)

《貝類學報》 45期 (2022/01) Pp. 1-10

摘要

Recent phylogenetic study and large-scaled collective study of the limpet-like capulids and coiled trichotropids in CAPULIDAE reveal an intermittent limpetization process by sedentary lifestyle on host features and lead to a high cryptic diversity with convergent shell forms. Most trichotropid species demonstrate limited range of distribution in depth and ocean geography. Once Beu synonymized 7 large capulids in Japan, New Zealand, Australia and New Caledonia. The author thinks this treatment conflicts the high cryptic diversity with convergent shell forms and ignores the limited depth and geographic distribution in CAPULIDAE. Two new modes of kleptoparasitism of Capulus gelatous n. sp. and Capulus jasminus n. sp. with their bivalve hosts from deep water of the Philippines are described.

關鍵字

GASTROPODA ； CAPULIDAE ； Capulus ； new species ； Philippines

並列摘要

偏蓋螺科帽型的偏蓋螺之親緣分析，顯示偏蓋螺由懸浮物攝食生物，演化至偷竊寄生生物，善用宿主的濾食水流及獲取較大量的食物，成為附生坐式生活型態。附生坐式生活型態，促使偏蓋螺再次獲得帽型殼型及科層面的趨同的帽型殼型。在趨同的帽型殼型中，以形態特徵，與雙殼貝宿主的互動及分子生化分析，可以區別偏蓋螺科隱暱的生物多樣性。作者於菲律賓近海，提出兩個偏蓋螺新種與其雙殼貝偷竊寄生宿主的互動模式。冰淇淋偏蓋螺，新種，Capulus gelatous n. sp.，正模式標本NMNS-8479-004。茉莉花偏蓋螺，新種，Capulus jasminus n. sp.，正模式標本NMNS-8479-005。正模式標本存放國立自然科學博物館。