發表於: 10-October-2010 at 2:43pm | IP Logged

殼E: 原本認為與Emmanuel的殼相同 

發表於: 10-October-2010 at 4:33pm | IP Logged

黃大哥，殼C不在台北，要歷時回家才能補拍，對於遠水救不了近火先說聲抱歉

另外，曾於邱Sr.的賣場購入一枚Metula inflata，給的資料是來自彭佳嶼100多米，但畢竟不是親自採集，所以僅供參考

發表於: 10-October-2010 at 5:21pm | IP Logged

正確阿格西,按此連結. 都是阿莫西長相.

發表於: 28-July-2011 at 10:50pm | IP Logged

這隻殼是南部漁船在接近東沙海域400米撈捕,殼長40.8mm.

新種命名,學名是Metula thachi Koen Fraussen & SI Huang, 2011

由於其他types都來自越南芽莊,所以學名字冠上外國字樣,至於中文名就由第二作者以模式產地定名為南海長峨螺.

以下是原始文章對這隻殼的敘述:

Description: Shell of medium size for the genus (up to 55mm in length). Shape slender, lens-shaped with high spire, stretched base, rather biconic. Whorls gently convex, slightly shouldered. Sculpture granulate, few axial varices present. Colour pale brown, upper spire whorls often paler or white. Axial varices slightly darker before, paler or white after varix. Aperture, outer lip and columella white.

Protoconch slender, 1.9 mm in length, diameter, 1.5 mm in diameter, consisting of about 1 3/4 convex whorls, slightly eroded. Transition to teleoconch marked by fine incremental lines.

First teleoconch whorl ornamented with 6 fine spiral cords; interspaces of equal size or slightly narrower. Second whorl starting with 9 primary spiral cords, third whorl with 12 cords. Penultimate whorl starting with 12 narrow, slightly flattened spiral cords; subsutural one fine. Interspaces of equal size on adapical part of whorl, narrower on abapical half of whorl, fine near lower suture. Some spiral cords on the shoulder may have a bilirate appearance. Body whorl with 28 narrow, slightly flattened spiral cords, becoming broad and flattened on base; in addition more than 15 fine or obscure spiral cords on siphonal canal. Secondary spiral cord absent on all whorls (in holotype) or a single fine secondary spiral present in one of the interspaces (paratype 1).

First teleoconch whorl with about 40 fine axial ribs with an opisthocline oriantation. Where the sculpture on the two first teleoconch whorls is dominant axial or rather reticulate, along the second teleoconch whorl the spiral sculpture increases in strenght and the sculpture on the third whorl is dominated by spiral cords or rather by the knobs situated which are situated where spiral and axial sculpture cross each other. Number of axial ribs slightly increasing, their shape shifting from opisthocline to opisthocyrt, third whorl with 43 axial, fourth whorl with 47 axials, penultimate whorl with 47 axials of which on broad varix, also body whorl with 47 axials of which 4 on the labral varix. A varix present on transition from penultimate whorl to body whorl.

Aperture narrow, semi-ovate, both ends pinched. Outer lip with 23 fine but sharp internal lirae, corresponding with spiral interspaces of outer sculpture . Columella gently curving, callus thick, smooth, slightly projecting where covering base of preceeding whorl. Lip thick, edge rather sharp; adapical part opisthocline, at midwhorl and abapical part prosocline , resulting in an inversed s-shaped lip when seen lateraly; abapical part of lip sligthly thinner when compared to adapical part. Siphonal canal open, broad, of medium size, typical of the genus. Aperture and siphonal canal together lesser than 2/3 of total shell length.

Animal and operculum unknown.

發表於: 28-July-2011 at 10:54pm | IP Logged

我一直提出”群”的概念,在現有Metula物種,indo-pacific fauna中,與這隻殼同一群的有: Metula crosnieri, Metula inflata, Metula metulina ,所以作者就以這三個物種做比較:

Comparison: Metula thachi n. sp. is characterized by the combination of diagonally orientated (opisthocline) axial ribs on the upper spire whorls and the s-shaped apertural lip, the rather uniform brownish colour, the varices which are brown on the side turned towards the earlier whorl and white on the opposite side and the rather simple spiral sculpture with a fine subsutural cord.

Metula crosnieri Bouchet, 1988 is somewhat similar in pattern and shape. That species however has a different range (Mozambique Channel) and differs by the broader shape and usually a larger adult size, the axial sculpture which is always streight (orthocline) also on the upper spire whorls, the spiral sculpture which consist of lesser but broader primary spiral cords and the presence of a fine secondary spiral cord, the pattern on the varices which is first white before turning to brown (instead of the opposite) and the presence of a broad darker spiral band at midwhorl.

Metula inflata (Houbrick, 1984) is much similar in spiral sculpture (including the narrower spiral interspaces at midwhorl)  and axial sculpture (including the opisthocline axial ribs) but differs by the gently curved convex whorls (instead of slightly shouldered), the broader base with shorter siphonal canal, the rather straight outer lip (instead of s-shaped), the obscure or absent varices and the presence of a broad darker spiral band at midwhorl.

Metula metulina (Kuroda & Habe in Kuroda, Habe & Oyama, 1971) is known from many area’s in the Indo-West Pacific and differs by the sharper sculpture, the presence of secondary spiral cords, the pattern consiting of 2 broad dark bands and several fine spiral lines on top of the spiral sculpture,

台灣產長峨螺還很紛亂,希望下一個成果有濃濃的本土味.