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尺寸:32mm
產地:東港
反口面(aboral) 原貌↓
反口面 (aboral) 原貌近拍↓

口面(oral) 原貌↓

口面 (oral) 原貌近拍↓

間步帶區(interambulacral area) 原貌↓

間步帶區 (interambulacral area) 原貌近拍↓
步帶區(Ambulacral area) 原貌↓
步帶區 (interambulacral area) 原貌近拍↓

洗後的反口面 (aboral)近拍 ↓

洗後的口面 (oral) ↓

洗後的口面 (oral)近拍 ↓

洗後的步帶區 (ambulacral area) ↓

洗後的步帶區 (ambulacral area)近拍 ↓
洗後間步帶區 (interambulacral area) ↓

洗後間步帶區 (interambulacral area) 近拍↓
Cidaridae頭帕科-Prionocidaris鋸頭帕屬的診斷特徵
英國自然歷史博物館(The Natural History Museum)針對Cidaridae頭帕科之Prionocidaris鋸頭帕屬的診斷特徵,列出以下9點特性以供參考:
Prionocidaris Agassiz, 1863
l Test relatively tall; moderately thin and fragile.
l Apical disc 40-50% test diameter; monocyclic. Genital plates all similar in size. All plates covered in scattered tubercles.

l Interambulacra with up to 12 plates in a series. Primary tubercles perforate and non-crenulate (the most adapical tubercles may have a trace of crenulation on their adapical side). Areoles ovate; incised; separated by scrobicular circles except immediately beside the peristome.

l Scrobicular tubercles hardly differentiated. Extrascrobicular zones not extensive; densely covered in heterogeneous secondary tubercles and granules.
l No sutural pits or furrows.
l Ambulacra weakly sinuous. Pore zones not incised; pore-pairs subconjugate to conjugate, the two pores usually widely separated. Perradial zone fully tuberculate, with marginal series of contiguous primary tubercles and inner zone of smaller secondary tubercles.

l Peristome a little smaller than apical disc. Interradial plate series not quite reaching the peristome; ambulacral plates uniserial in each column.

l Primary spines long and relatively slender; tapering or ending in small crown. Collar and neck short; shaft ornamented in rows of modest thorns; surface between thorns covered in fine cortical hairs.


l Secondary spines flattened but not adpressed.

在海邊游泳、浮潛或潛水時,要特別注意『海底的地雷』--->海膽,如果一不小心一屁股坐在牠們身上,將會令您趴睡一個月,終身難忘。如果腳踩到或四肢刺到,也將令你痛苦萬分。
有些種類海膽的棘刺非常尖銳,尤其是魔鬼海膽的棘刺會穿透衣物及潛水衣,穿刺入人體並且會斷在肉中,它們不像魚刺般具有韌性,而較像是鉛筆蕊一樣中空易脆,刺的未端具有毒囊,含有很強刺激性及毒性的毒液,不但會引起劇烈的疼痛而且斷在肉中棘刺也會引起人體的異物反應,故想要用針挑出或挖出來,不是那麼容易,因為棘刺中空易脆,針頭輕輕一碰,很容易就碎掉。
最好用一隻止血鉗,輕輕夾住再整個慢慢拔出,如果沒有帶止血鉗的話,只好用土法煉鋼,慢慢擠出來一部份後,再整個慢慢拔出。
以下有兩則土法煉鋼,自行拔出斷掉的棘刺。
另一則嘗試使用拔毛鉗(用力過度)與迴紋針挑,但失敗的例子。
















































