Phylum Mollusca 軟體動物門

Class Gastropods 腹足綱

Family Camaenidae 南亞蝸牛科

Scientific name Amphidromus beccarii

Chinese name

Author Tapparone-Canefri, 1883

Size 44.02mm

Description Specimen found on pineapple plantation’s. South East Sulawesi, East Indonesia. April 2015.

 

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Amphidromus beccarii 44.02mm

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Phylum Mollusca 軟體動物門

Class Gastropods 腹足綱

Family Camaenidae 南亞蝸牛科

Scientific name Amphidromus semifrenatus

Chinese name

Author von Martens, 1900

Size 25.228.3928.8,  30.11 mm

Description Solid color form, Aceh. North Sumatra. Indonesia.

The color pattern shows affinities to both porcellanus and sumatranus, but A. semifrenatus differs by having a narrow black or brown band that winds around the insertion of the columella and is continued into the aperture above the columellar insertion. Several color varieties have been described but not named, and many shells cannot be fitted into any of the listed variations. Specimens from Atjeh, Sumatra (CNHM 72388), have prominent flames on the upper whorls that disappear below. (Laidlaw & Solem 1961)

Reference materials (參考資料)

Amphidromus semifrenatus von Martens, 1900, Nachr, Malak. Gesell., 32: 8-9—Deli, North Sumatra;

Pilsbry, 1900, Man. Conch., (2), 13: 219-220;

Vernhout, 1913 (part). Notes Leyden Mus., 35: 164-155, figs. 1-2;

 

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Amphidromus semifrenatus 25.2 to 30.11mm

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Phylum Mollusca 軟體動物門

Class Gastropods 腹足綱

Family Camaenidae 南亞蝸牛科

Scientific name Amphidromus semifrenatus

Chinese name

Author von Martens, 1900

Size 28.8mm

Description Solid color form, Aceh. North Sumatra. Indonesia.

The color pattern shows affinities to both porcellanus and sumatranus, but A. semifrenatus differs by having a narrow black or brown band that winds around the insertion of the columella and is continued into the aperture above the columellar insertion. Several color varieties have been described but not named, and many shells cannot be fitted into any of the listed variations. Specimens from Atjeh, Sumatra (CNHM 72388), have prominent flames on the upper whorls that disappear below. (Laidlaw & Solem 1961)

Reference materials (參考資料)

Amphidromus semifrenatus von Martens, 1900, Nachr, Malak. Gesell., 32: 8-9—Deli, North Sumatra;

Pilsbry, 1900, Man. Conch., (2), 13: 219-220;

Vernhout, 1913 (part). Notes Leyden Mus., 35: 164-155, figs. 1-2;

 

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Amphidromus semifrenatus 28.8mm

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Phylum Mollusca 軟體動物門

Class Gastropods 腹足綱

Family Camaenidae 南亞蝸牛科

Scientific name Amphidromus semifrenatus

Chinese name

Author von Martens, 1900

Size 25.2mm

Description Solid color form, Aceh. North Sumatra. Indonesia.

The color pattern shows affinities to both porcellanus and sumatranus, but A. semifrenatus differs by having a narrow black or brown band that winds around the insertion of the columella and is continued into the aperture above the columellar insertion. Several color varieties have been described but not named, and many shells cannot be fitted into any of the listed variations. Specimens from Atjeh, Sumatra (CNHM 72388), have prominent flames on the upper whorls that disappear below. (Laidlaw & Solem 1961)

Reference materials (參考資料)

Amphidromus semifrenatus von Martens, 1900, Nachr, Malak. Gesell., 32: 8-9—Deli, North Sumatra;

Pilsbry, 1900, Man. Conch., (2), 13: 219-220;

Vernhout, 1913 (part). Notes Leyden Mus., 35: 164-155, figs. 1-2;

 

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Amphidromus semifrenatus 25.2mm

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Phylum Mollusca 軟體動物門

Class Gastropods 腹足綱

Family Camaenidae 南亞蝸牛科

Scientific name Amphidromus ilsa

Chinese name

Author Rensch, 1933

Size 28.23mm

Description Taken from short plants, on leaves, in forest. Weh Island, off the coast of Aceh, North Sumatra Island. Indonesia. August, 2015.

 

Reference materials (參考資料)

Amphidromus ilsa Rensch, 1933, Zool. Anz., 102: 206, fig. 11—woods at Sabang, Pulau Weh, Sumatra;

van Benthem Jutting, 1959, Beaufortia, 7, (83), p. 183.

 

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Amphidromus ilsa 28.23mm

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Phylum Mollusca 軟體動物門

Class Gastropods 腹足綱

Family Camaenidae 南亞蝸牛科

Scientific name Amphidromus porcellanus

Chinese name

Author Mousson, 1848

Size 23.89 & 30.24 mm

Description Specimen found on altitude 325 meters high, Lampung, South Sumatra, Indonesia. March, 2014.

 

The shell is ornamented with relatively narrow radial flames which are usually interrupted by a clear spiral peripheral zone. The base has spiral dark bands and the subsutural zone is white or yellow.

 

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Amphidromus porcellanus 23.89 %26; 30.24mm

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Phylum Mollusca 軟體動物門

Class Gastropods 腹足綱

Family Camaenidae 南亞蝸牛科

Scientific name Amphidromus porcellanus

Chinese name

Author Mousson, 1848

Size 21.61mm

Description Specimen found on altitude 325 meters high, Lampung, South Sumatra, Indonesia. March, 2014.

 

The shell is ornamented with relatively narrow radial flames which are usually interrupted by a clear spiral peripheral zone. The base has spiral dark bands and the subsutural zone is white or yellow.

 

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Amphidromus porcellanus 30.24mm

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Phylum Mollusca 軟體動物門

Class Gastropods 腹足綱

Family Camaenidae 南亞蝸牛科

Scientific name Amphidromus latestrigatus

Chinese name

Author Schepman, 1892

Size 38.38mm

Description (Brown form), Found on short trees and assorted bushes from Central Sumba Island, Eastern Indonesia. February, 2015.

Many color variations, 3 of this species have been named. Typically they are rather easily separable, but enough intergrading individuals have been found to show that they are variants of one species.

Typical latestrigatus has broad radial flame-like markings and a roseate aperture (Sumba).

Variety sumbaensis Fulton, 1896, usually has the flame markings partially forked above and very irregular and obscured on the lower whorls. Often it is very difficult to separate sumbaensis and latestrigatus.

Variety consobrinus Fulton, 1897, from south Flores, has the color pattern reduced to one or two spiral bands on later whorls, with the lip and apical patches red. All forms have been found on Sumba, but only consobrinus on Flores.

 

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Amphidromus latestrigatus 38.38mm

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Phylum Mollusca 軟體動物門

Class Gastropods 腹足綱

Family Camaenidae 南亞蝸牛科

Scientific name Amphidromus perversus perversus

Chinese name

Author (Linnaeus, 1758)

Size 39.2140.48,  46.4047.42 mm

Description South West Sulawesi Island, Indonesia. July, 2015.  This is the Original/First Amphironus perversus described by Linnaeus. Refer to Pilsbry

 

The nominate race is a solid yellow shell with black varix and narrow black band behind the peristome and a highly variable polytypic species. It is known from the whole range of the species.

 

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Amphidromus perversus perversus 39.52 to 47.42mm

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Phylum Mollusca 軟體動物門

Class Gastropods 腹足綱

Family Camaenidae 南亞蝸牛科

Scientific name Amphidromus perversus perversus

Chinese name

Author (Linnaeus, 1758)

Size 40.48mm

Description South West Sulawesi Island, Indonesia. July, 2015.  This is the Original/First Amphironus perversus described by Linnaeus. Refer to Pilsbry

 

The nominate race is a solid yellow shell with black varix and narrow black band behind the peristome and a highly variable polytypic species. It is known from the whole range of the species.

 

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Amphidromus perversus perversus 40.48mm

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