Comparative study of bisected proboscides of Pycnogonida

Comparative study of bisected proboscides of Pycnogonida
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扁果类平分长鼻的比较研究

DOI:
10.1007/s13127-016-0310-6
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发表时间:
2017
影响因子:
1.6
通讯作者:
Melzer RR
Melzer RR
中科院分区:
生物学2区
文献类型:
--
作者:
Wagner P;Dömel JS;Hofmann M;Hübner J;Leese F;Melzer RR

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为了比较描述扁形动物的“内部”咽骨架,我们将Achelia langi的长鼻一分为二(Dohrn,1881),Anoplodactylus californicusHall,1912,AscorhynchuscastellioidesStock,1957,Austrodecus glacialeHodgson,1907,Callipallene玛格丽特(戈登, 1932)、Colossendeis macerrimaWilson, 1881、Endeis spinosa(Montagu, 1808)、Nymphon macronyxSars, 1877、Pallenopsis patagonica(Hoek, 1881)、Pantopipettasp.、Pigromitus timsanus Calman, 1927 和 Pycnogonum litorale(斯特罗姆,1762)和 用扫描电子显微镜(SEM)对它们进行分析。此外,长鼻用肌动蛋白绿染色,用荧光和共聚焦显微镜(A. langi)可视化肌肉排列,并用微计算机X射线断层扫描(μCT;Ascorhynchus japonicus)进行分析。根据我们的观察,建立了不同分类群之间不同的特征集。这些特征包括长鼻的长度和宽度、内口开口的形状和结构、反齿的边界和骨架、小齿阵列和行的形状和位置、咽部过滤器装置的相对长度以及过滤器刷毛的排列和结构。对这些特征的分析表明,泛足类动物的长鼻内表面存在很大的变化,这可能是为了适应不同的食物来源。最后,我们认为牡蛎篮的存在代表了 Pycnogonida 的地面图案特征。
To comparatively describe “inner” pharynx armatures in pycnogonids, we bisected proboscides ofAchelia langi(Dohrn, 1881),Anoplodactylus californicusHall, 1912,Ascorhynchus castellioidesStock, 1957,Austrodecus glacialeHodgson, 1907,Callipallene margarita(Gordon, 1932),Colossendeis macerrimaWilson, 1881,Endeis spinosa(Montagu, 1808),Nymphon macronyxSars, 1877,Pallenopsis patagonica(Hoek, 1881),Pantopipettasp.,Pigrogromitus timsanusCalman, 1927, andPycnogonum litorale(Strøm, 1762) and analyzed them with the scanning electron microscope (SEM). Moreover, proboscides were stained with actin green to visualize the muscle arrangement with fluorescence and confocal microscopes (A. langi) and were analyzed with microcomputed X-ray tomography (μCT;Ascorhynchus japonicus). As a result of our observations, sets of characters that vary between taxa are established. These traits include length and width of proboscis, shape and structure of the inner mouth opening, borders and armature of the antimeres, shape and position of denticle arrays and rows, relative length of pharyngeal filter apparatus, and arrangement and structure of the filter bristles. Analyses of these characters indicate a substantial variability on the pantopod’s proboscis inner surface probably as an adaptation to different food sources. Finally, we suggest that the presence of the oyster basket represents a ground pattern character of Pycnogonida.
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