Tag Archives: Laminella

Laminella picta (Mighels)

Decorated Laminella Snail (Laminella picta)  

The Decorated Laminella Snail was described in 1845; it is, or rather was, endemic to the island of Maui, Hawaiian Islands.

The shells reach sizes of about 1,43 to 1,6 cm in height; they mostly are opaque white and are decorated with small dark dots.

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This is one of the few Hawaiian snail species of which we know at least a little something about the animal itself.:

“… densely black, surface checkered by fine lines of a light color; tentacles slate, much produced; mantle and bottom of foot brownish-black; when extended same length as the shell.” [1]

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The species is now considered extinct.

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References:

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’ 

(public domain)

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edited: 02.06.2021

Laminella citrina (Mighels)

Citrine Laminella Snail (Laminella citrina)

The Citrine Laminella Snail was described in 1848, it was restricted to the island of Moloka’i, Hawaiian Islands, where it did inhabit a narrow area on the ridge of the island south of the northern peninsula.

The shells reached sizes of 1,6 to 1,75 cm in height; the usually have a uniformly light yellowish color, sometimes becoming darker on the last whorl, some shells bear various dots on their neanic whorls. [1]

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This is one of the few Hawaiian snail species of which we know a little bit about the animals themselves.:

“Animal of a uniform light yellow color, superior tentacles and tentacular sheath light slate.” [1]

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Like most terrestrial Hawaiian snail species, also this one is now extinct.

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References:

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911  

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’  

(public domain) 

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edited: 02.06.2021

Laminella straminea (Reeve)

Straw-colored Laminella Snail (Laminella straminea)

The Straw-colored Laminella Snail was described in 1850; it was endemic to the island of O’ahu in the Hawaiian Islands, where it is known from several valleys, including the Makiki-, Nu’uanu-, Palolo-, Pauoa, and Waiala’e nui Valleys. The species was almost entirely found on the leaves of the endemic olonā (Touchardia latifolia Gaudich.). [1]

The shells reach sizes of about 2,2 to 2,4 cm in height; they are “acuminately oblong, sinistral, whorls convex, obliquely striated, columella strongly twist-plaited; straw-colored, unspotted.” [1]

We have a little information about the animal itself.:

“Animal of a uniform light flesh color, oral aperture margined with a line of orange.” [1]

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This species is now considered most likely extinct.

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References:

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’

(public domain) 

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edited: 02.06.2021

Laminella remyi (Newcomb)

Remy’s Laminella Snail (Laminella remyi)

Remy’s Laminella Snail was described in 1855; it was endemic to the island of Lana’i in the Hawaiian Islands. 

The shells reach sizes of about 1,4 cm in height; they are “… very pale buff, with some pink suffusion on the last whorl and the embryonic whorls. The first half-whorl is smooth, convex and uniform pinkish-brown; next whorl streaked, flattened ad unevenly, rather weakly costate; on part of the third whorl the costation or corrugation is stronger, more or less irregular, after that weakening. The last whorl is very finely striatulate. There are reddish streaks between the ribs on the embryonic whorls; near the end of the third whorl these give place to a few widely-spaced oblique blackish stripes; after which the angular, zigzag or netted pattern begins. This pattern is essentially like that of L. tetrao. The interior of the aperture and the columella are pink; columellar lamella simple, steeply ascending.” [1]

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The species is now considered extinct.

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References:

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’ 

(public domain) 

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edited: 02.06.2021

Laminella venusta (Mighels)

Graceful Laminella Snail (Laminella venusta)  

The Graceful Laminella Snail was described in 1845, it was found in the Mapulehu Valley near the southeastern coast of Moloka’i, Hawaiian Islands.

This species differs from the congeneric Alexander’s Laminella Snail (Laminella alexandri (Newcomb)) and the Depicted Laminella Snail (Laminella depicta (Baldwin)) by its more swollen last whorl and the sunken black markings, which are generally coarser than in L. depicta and which do not form the characteristic patterns.

The shells reach sizes of about 1,35 cm in heigth and 0,62 to 0,73 in diameter.

The animal itself is also mentioned in the description.:

“The animal … is slender, body flesh-color with black puncta down the sides; tentacles very black. When extended, two-thirds as long as the shell.” [1]

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The Graceful Laminella Snail has three additional color morphs assigned to it, orginally described as varieties, which in fact may well be distinct subspecies: var. muscaria Hyatt & Pilsbry, var. orientalis Hyatt & Pilsbry, var. semivestita Hyatt & Pilsbry. [1]

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References:

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’ 

(public domain)

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edited: 01.10.2020

Laminella depicta (Baldwin)

Depicted Laminella Snail (Laminella depicta)

The Depicted Laminella Snail is, or rather was, endemic to the island of Moloka’i, Hawaiian Islands, where it inhabited the lowland forests in the Pelekunu Valley and the Ha’upu Bay.

The shells reached sizes of 1,5 to 1,7 cm in heigth.

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The Depicted Laminella Snail was also treated as a subspecies of Alexander’s Amastra Snail (Laminella alexandri (Newcomb)), which, however, occurs on the island of Maui.

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’  

(public domain)

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edited: 12.06.2020

Laminella kuhnsi (Cooke)

Kuhns’ Laminella Snail (Laminella kuhnsi)

Kuhns’ Laminella Snail was described in 1908, it was originally identified as another species, Amastra erecta (Pease), but was subsequently recognized as being a distinct species (and genus).

The species was found in the vicinity of the Kahakuloa Bay at the northern north-east of western Maui, Hawaiian Islands.

The shells reached sizes of about 1,34 cm in length, they were completely brown and had some zigzag markings in their epidermis, there appears to have also been a straw-colored variety. [1]

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References:

[1] C. Montague Cooke Jr.: Amastra (Laminella) kuhnsi. Bishop Museum Occasional Papers 3(2): 217-218. 1908

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Depiction from: ‘C. Montague Cooke Jr.: Amastra (Laminella) kuhnsi. Bishop Museum Occasional Papers 3(2): 217-218. 1908’

(public domain)

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edited: 12.06.2020