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Amastra Mucronata Citrea
''Amastra'' is a genus of small air-breathing land snails, terrestrial animal, terrestrial pulmonate gastropod mollusks in the family Amastridae. Like many Hawaiian land snails, species in this genus have adapted to a specific ecological niche and have evolved in relative isolation. They are thriving in wet or moderately wet forested areas. Many of the species in this genus have become extinct in recent times or have become critically endangered through habitat loss or predation. This loss is often highlighted as part of the broader biodiversity crisis faced by the Hawaiian Islands. Description The elongated shell is typically dextral (but some are sinistral), ranging from globose-conic to oblong-conic in shape. It may be umbilicate or imperforate. he shell surface might show growth striations or a fine malleation. The coloration varies, often appearing dull or dark, but sometimes light with a dull, darker, or yellowish cuticle. The shell consists of 5½ to 8 Whorl (mollusc), wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amastra Elongata
''Amastra'' is a genus of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Amastridae. Like many Hawaiian land snails, species in this genus have adapted to a specific ecological niche and have evolved in relative isolation. They are thriving in wet or moderately wet forested areas. Many of the species in this genus have become extinct in recent times or have become critically endangered through habitat loss or predation. This loss is often highlighted as part of the broader biodiversity crisis faced by the Hawaiian Islands. Description The elongated shell is typically dextral (but some are sinistral), ranging from globose-conic to oblong-conic in shape. It may be umbilicate or imperforate. he shell surface might show growth striations or a fine malleation. The coloration varies, often appearing dull or dark, but sometimes light with a dull, darker, or yellowish cuticle. The shell consists of 5½ to 8 whorls, with the spire and apex conical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amastra Abavus
''Amastra abavus'' is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. Description The length of the shell attains 11 mm, its diameter 6 mm. (Original description) The shell contains 5½ whorls. It is imperforate, ovate-conic, exceptionally thick and solid, with a somewhat glossy surface. As a fossil, it lacks a cuticle. The coloration exhibits two variations: (1) the first 2½ whorls are pale brown, followed by a half-whorl with brown bands on a white background, and the final 1½ whorls are opaque white; or (2) a pale brown shell with white bands beginning on the penultimate whorl and dominating the body whorl. The spire's outlines are slightly convex at the base and straight above, with an obtuse apex. The whorls in the protoconch are convex and very finely striated, with the first whorl being nearly smooth. The subsequent whorls are weakly convex, marked by fine growth lines typical of the species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amastra Borcherdingi
''Amastra borcherdingi'' is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. Description The length of the shell attains 19 mm, its diameter 10.5 mm. (Original description) The shell contains 6⅓ whorls. The shell is ovate-conic, narrowly perforate or imperforate, and moderately robust. The upper three or four whorls are reddish-brown (rarely pale yellow), transitioning to white with a faint flesh tint on the last two whorls. These are intricately adorned with angular, zigzag, or interrupted dark brown patterns, which become chestnut with darker streaks on the last half-whorl. The cuticle is often absent near the aperture, partially worn away elsewhere, and frequently almost entirely lost in mature specimens. The embryonic shell has flat whorls with prominent ribs, and the second whorl displays a distinct keel just above the suture. The subsequent whorls are marked by rather fine, irregular growth lines, and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amastra Biplicata
''Amastra biplicata'' was a species of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Amastridae. Description (Original description) The shell is dextrorsal and elongately cylindrical, composed of seven rounded whorls with pronounced longitudinal striations. The suture is deep, and the small aperture is subovate. The inner lip is somewhat callous, while the columella is biplicate. The outer lip is acute and subtly submarginate internally. The shell is rosy, partially veiled by a thin brown epidermis, with the upper whorls appearing black. The aperture interior is a vivid red. Distribution This marine species is endemic to Hawaii and occurs on Lanai Lānai is the sixth-largest of the Hawaiian Islands and the smallest publicly accessible inhabited island in the chain. It is colloquially known as the Pineapple Island because of its past as an island-wide pineapple plantation. The island's on ... Island. References * External links Bai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amastra Baldwiniana
''Amastra baldwiniana'' is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. ;Subspecies: * ''Amastra baldwiniana kahakuloensis'' Pilsbry & C. M. Cooke, 1914 Description The length of the shell attains 22.7 mm, its diameter 13.1 mm. (Original description) The shell contains 6½ whorls. The shell is imperforate, globose-conic, and moderately solid, with a very pale brown or creamy-white base color beneath a thin, somewhat glossy dark-brown cuticle streaked with black. The cuticle may be inconspicuous or absent on the upper part of the body whorl. When retained on the penultimate whorl, the cuticle is irregularly mottled or angularly streaked, resembling ''Amastra nigra''. The light streaks on the body whorl may show faint traces of spiral bands. The shell's substance is uniformly white or occasionally purplish-brown on the spire. The spire is straightly conic, sometimes slightly contracted near the apex. The fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amastra Badia
''Amastra badia'' is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. Description The length of the shell attains 17 mm, its diameter 12 mm. (Original description) The shell contains 6½ whorls. The shell is dextral, imperforate, relatively thin, and elongately ovate-conic. Its surface is glossy, adorned with delicate, closely spaced thread-like rib-striae aligned with the growth lines. The whorls of the protoconch are distinctly radiately sulcated. The shell's coloration is a rich dark chestnut-brown, decorated with light brown zigzag or undulating lines and markings. It consists of 6½ slightly convex whorls, with a moderately impressed suture. The aperture is oval and slightly oblique, with a livid white interior that subtly reveals the brown exterior coloration. The peristome is acute and minimally thickened on the inner side. The columella is white, flexuous, and ends abruptly in a thin, slightly arched l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amastra Aurostoma
''Amastra aurostoma'' is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. Description The length of the shell attains 25 mm, its diameter 12 mm. (Later supplemental description by Hyatt, A. & Pilsbry, H. A. ) The shell is imperforate, oblong-conic, and solid, with a yellow base overlaid by a dark chestnut-brown cuticle that is smooth, somewhat glossy, and streaked with yellow on the spire. The apex is reddish-brown. The whorls of the protoconch are distinctly costate and carinate, with the carina situated very close to the suture. The subsequent whorls are slightly convex, marked by low striae that become weaker on the body whorl, which is regularly elliptical and lacks malleation. The aperture is ovate and yellow on the interior. The outer lip is simple, without a thickened lip rib. The columella is yellow, featuring a prominent fold of the same color. The parietal callus is tinted and typically thickened. W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amastra Assimilis
''Amastra assimilis'' is a species of land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. Description (Original description) The shell is conically elongate and sharply acute at the apex, consisting of seven rounded whorls with a well-defined, impressed suture. The aperture is small and ovate, while the columella is very short, plicate, and twisted. The outer lip is acute and slightly thickened internally. The shell's color varies from white to salmon, with some specimens displaying a white lower half on the body whorl and a salmon upper half. The interior is pure white. Distribution This species is endemic to Hawaii and occurs on Maui Maui (; Hawaiian language, Hawaiian: ) is the second largest island in the Hawaiian archipelago, at 727.2 square miles (1,883 km2). It is the List of islands of the United States by area, 17th-largest in the United States. Maui is one of ... Island. References * External links * {{Taxonbar, from=Q ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amastra Antiqua
''Amastra antiqua'' is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. ;Subspecies: * ''Amastra antiqua antiqua'' (Baldwin, 1895) * ''Amastra antiqua kawaihapaiensis'' Pilsbry & C. M. Cooke, 1914 Description The length of the shell attains 20 mm, its diameter 12 mm. (Original description) The shell contains 6 whorls. The fossil shell is dextral, narrowly yet deeply perforated, with the perforation extending nearly to the apex. It is solid and elongately ovate, with a subacute apex. The surface is sculptured with coarse, irregular growth lines, while the apical whorls are smooth. The color of the living shell is unknown. The shell consists of six convex whorls, separated by a well-impressed suture. The aperture is slightly oblique and sublunate. The peristome is thickened on the inner side, with the columellar margin adnate and slightly expanded over the umbilicus. The extremities of the peristome converge and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amastra Anthonii
''Amastra anthonii'' is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. ;Subspecies: * ''Amastra anthonii anthonii'' (Newcomb, 1861) * ''Amastra anthonii meineckei'' C. M. Cooke, 1933 * ''Amastra anthonii remota'' C. M. Cooke, 1917 * ''Amastra anthonii subglobosa'' C. M. Cooke, 1933 Description The length of the shell attains 15 mm, its diameter 10 mm. (Original description) The shell contains 6 whorls. The shell is conically ovate, solid, and blackish-brown, with longitudinal striations. It comprises six inflated whorls, separated by a moderately impressed suture. The apex is obtuse. The aperture is obliquely ovate, subtly angulate at the base. The outer lip is simple and thickened on the inner side. The columella is short and straight, bearing a somewhat callous plication below its midpoint. The shell features a distinct white band below the suture and a dirty white coloration in the umbilical region. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amastra Albolabris
''Amastra albolabris'' was a species of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Amastridae. Description (Original description) The shell is conically ovate with an acute apex and six rounded, non-margined whorls. The aperture is ovate, and the columella is short with plicate teeth. The semilunar lip is thickened and white. The shell is dark umber in color, highlighted by a yellow sutural line, with the interior a striking bluish-white Distribution This species was endemic to Oahu, and was known from the Waianae Range Waianae () is a census-designated place (CDP) in the City and County of Honolulu, Hawaii, United States. As of the 2020 census, the CDP population was 13,614. Its name means "waters of the mullet". Its etymology is shared with the far norther .... References * {{Taxonbar, from=Q308668 albolabris Extinct gastropods Taxonomy articles created by Polbot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amastra Albocincta
''Amastra albocincta'' is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. Description The length of the shell attains 9.3 mm, its diameter 5 mm. (Original description) The shell is small, perforate, oblong-conic, and thin. It has a somewhat glossy surface that may appear soiled in life. The spire is straightly conic, tapering to a minute apex. The embryonic whorls are elongated, strongly convex, and adorned with fine striations, giving them a silky luster. The remaining whorls are convex and angular at the periphery, with the angle concealed in adults or occasionally visible just above the suture. The body whorl is rounded, featuring irregular, delicate growth striae. Its coloration is liver-brown, often streaked with yellow and adorned with creamy bands near the suture, periphery, and columella, though these bands are sometimes faint or absent. The aperture is dark within, and the outer lip is thin and not in the leas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |