肛孔 的英文怎麼說

Diagnostic characters for the recognition of species include the presence or absence of pectoral fin, the position of dorsal fin origin, gill opening, anus, nostril opening and eye, the cirri present or not, the dentition type, the body coloration, and the head pores or lateral line etc

一般依據胸鰭的有無或發達程度，背鰭起點、鰓孔、肛門、鼻孔和眼等的相對位置，頜的發達程度和頜上是否具須，齒的形狀和排列方式，身體的斑紋，以及頭部和體側的側線孔數目等進行鑒別。

The thirty - four species of the sea urchins belong to 7 order, 17 families and 28 genera. the following is the name list, those with an asterisk are the species recorded for the first time in china. order cidaroida family cidaridae * goniocidaris biserialis ( d6derlein ) * stylocidaris bracteata ( a. agassiz ) * stylocidaris ryukyuensis shigei * stereocidaris indica philippinensis mortensen * rhopalocidaris gracilis doderlein order lepidocentroida family echinothuridae * phormosoma bursarium ( a. agassiz ) araeosoma owstoni mortensen asthenosoma ijimai yoshiwara order stirodonta family phymosomatidae glyptocidaris crenularis a. agassiz family arbaciidae * coelopleurus maculata a. agassiz et h. l. clark * coelopleurus undulatus mortensen order aulodonta family diadematidae chaetodiademajaponicum mortensen family pedinidae * caenopedina mirabilis ( d6derlein ) order camarodonta family temnopledridae temnopleurus hardwickii ( gray ) temnopleurus toreumaticus ( leske ) temnopleurus reevesii ( gray ) temnopleurus apodus ( a. agassiz et h. l. clark ) temnotrema sculptum ( a. agassiz ) temnotrema reticulatum mortensen * microcyphus olivaceus ( d6derlein ) * prionechinus forbesianus ( a. agassiz ) family strongylocentrotidae strongylocentrotus nudus ( a. agassiz ) hemicentrotus pulcherrimus ( a. agassiz ) family echinometridae anthocidaris crassispina ( a. agassiz ) order clypeasteroida family clypeasteridae clypeaster virescens doderlein family laganidae * peronellapellucida d5derlein family scutellidae * scaphechinus mirabilis a. agassiz sinaechinocyamus planus liao family fibulariidae fibularia acuta yoshiwara order spatangoida family loveniidae - lovenia triforis koehler echinocardium cordatum ( pennant ) family schizasteridae schizaster lacunosus ( linnaeus ) family brissidae * gymnopataqus magnus ( a. agassiz & h. l. clark ) family spatangidae * spatangus luetkeni a. agassiz among the species reported, the following species call for notes or simple descriptions

本文根據th . mortensen （ 1928 - 1955 ）海膽專著（ amonographoftheechinoidea ）中的主要分類依據，將海膽綱分為8個目： 1 ）頭帕目（ cidaroidea ）有齒器，圍肛部在頂系內，圍口部有步帶板和間步帶板，大棘很大，有外皮層，無球棘； 2 ）鱗棘目（ lepidocentroida ）有齒器，圍肛部在頂系內，圍口部僅有步帶板，大棘不很大，無外皮層，有球棘； 3 ）脊齒目（ stirodonta ）有齒器，圍肛部在頂系內，齒器的齒有脊，橈骨片在齒上方不相接，顎孔開放； 4 ）管齒目（ aulodonta ）齒器的齒無脊，圍肛部在頂系內； 5 ）拱齒目（ camarodonta ）有齒器，圍肛部在頂系內，齒器的齒有脊，橈骨片在齒上方相接，顎孔封閉； 6 ）全雕目（ holectypoida ）有齒器，但不發達或完全被吸收，圍肛部在頂系外，步帶不形成瓣狀和葉鰓； 7 ） ?形目（ clypeasteroida ）齒器發達，圍肛部在頂系外，步帶形成瓣狀，無葉鰓； 8 ）蝟團目（ spatangoida ）無齒器，圍肛部在頂系外，葉鰓發達，步帶形成瓣狀。

The absence or closure of a normal body orifice or tubular passage such as the anus, intestine, or external ear canal

（先天性）閉鎖，無孔正常的身體孔或管道，如肛門、腸或外耳道的缺失或閉合