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首页> 外文期刊>Journal of Molluscan Studies >The Functional Morphology of the Antarctic Bivalve ThraciaMeridionalis Smith, 1885 (Anomalodesmata: Thraciidae)
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The Functional Morphology of the Antarctic Bivalve ThraciaMeridionalis Smith, 1885 (Anomalodesmata: Thraciidae)

机译：南极双壳类ThraciaMeridionalis Smith的功能形态，1885年（Anomalodesmata：Thraciidae）

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摘要

The functional morphology of the Thraciidae is poorly understood. Although some morphological aspects of several members have been described, only Trigonothracia jinxingae from Chinese waters is known in detail. Thracia meridionalis is the only representative of the family in Antarctic waters, and is common in Admiralty Bay, King George Island, where it inhabits muddy sediments. Thracia meridionalis shares many features with Tr. jinxingae that are typical of most Anomalodesmata, i.e. A secondary 'ligament' of thickened periostracum, extensively fused mantle margins, ctenidia of type E, a ctenidial-labial palp junction of category III, a stomach of type IV and simultaneous hermaphroditism. Thracia meridionalis is, however, strikingly different from Tr. jinxingae in a number of ways, such as the presence of a fourth pallial aperture, statocysts of type B sub(3), heterorhabdic ctenidia, direct communication between the mantle chambers, a deep-burrowing habit (individuals lying on the left shell valve), siphons that retract into mucus- lined burrows, a stomach with extensive sorting areas, a rectum which passes over the kidneys and separate male and female gonadial apertures. There is, therefore, a greater range of morphological diversity within the Thraciidae than previously suspected.
机译：the科的功能形态了解甚少。尽管已经描述了几个成员的一些形态学方面，但是仅详细了解来自中国水域的金三角藻。 Thracia meridionalis是南极水域中该家族的唯一代表，并常见于居住于泥泞沉积物中的乔治国王岛金钟湾。拟南芥（Thracia meridionalis）与Tr有许多共同之处。金星科是大多数异常动物的典型特征，即增生的骨膜的次级``韧带''，广泛融合的地幔边缘，E型的蜕膜，III类的ten唇-唇ial指节，IV型的胃和同时的雌雄同体。但是，子午线虫与Tr截然不同。金星科以多种方式存在，例如存在第四个睑裂孔，B型sub（3）型囊状囊，异种畸形的颅盖虫，地幔室之间的直接连通，深挖的习惯（个体位于左壳瓣上） ，虹吸管可缩回粘液状的洞穴中，胃具有广泛的分选区域，直肠穿过肾脏，并分开了男性和女性的性腺孔。因此，与以前所怀疑的相比，蝗科的形态多样性范围更大。

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