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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Morocconites ： ウィキペディア英語版 Morocconites ''Morocconites malladoides'', is an average size (about ) trilobite, which lived during the Devonian period, in what is now southern Morocco. This species is assumed to be a close relative of ''Acastoides''. The most conspicuous feature is the very long upcurved frontal medial spine, a bit like an avocet bill. It is the only known species in this genus (i.e. the genus is monotypic). == Description == The general horizontal outline of ''Morocconites'' is a bar about twice as long as wide, with approximately parallel sides and rounded front and back ends. The horizontal outline of the head (or cephalon) is pentangular, with a long upcurved frontal medial spine. At the axis, the cephalon takes up about 3 tenths of the total body length. The horizontal outline of the raised part of the cephalon is approximately parabolic. The central area of the cephalon, that is separated from the eye area by a lateral furrow, is called glabella. Posteriorly, a left to right furrow singles off the occipital ring. This furrow is deep laterally and shallower near the axis. In front of the occipital ring the glabella is divided by deep furrows into three pairs of lateral lobes and a frontal lobe, but these furrows do not cross the axis. The most posterior of the three lateral lobes is bluntly triangular. The other lateral lobes look like match heads, the anterior one larger and stretching out further from the axis. The frontal lobe is mushroom-shaped. It has schizochroal eyes with 26 vertical rows (or files), each containing 5 or rarely 6 lenses per file, except for a few files with less lenses at the front and back edge of the eye. The posterior margin of the cephalon progressively curves backwards laterally to about 60˚ with the axis. There is no genal spine, in fact, the genal angle is gently rounded. Its body (or thorax) has 11 articulating segments, like most Phacopina. The axis is about ¼ of the width of the thorax and lightly convex (transversely). The side lobes (or pleural lobes) do not end in spines, but are gently rounded, and the margin of the tail piece (or pygidium) is entire, two features it shares with both other Acastinae and Phacopidae. The pygidium takes up about ¼ of the total body length. The axis of the pygidium is divided in about 9 recognisable segments. The furrows of the 5 most anterior segments are deep laterally, but very shallow in the middle third. The furrows between the posterior pygidial segments are faint, while segmentation in the pleural region of the pygidium is barely discernable. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Morocconites」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.