Amphidromus adamsii

{{Short description|Species of gastropod}}

{{Speciesbox

| image = Tree Snail (Amphidromus adamsii) (8419517954).jpg

| image_caption = A live Amphidromus adamsii

| taxon = Amphidromus adamsii

| authority = (Reeve, 1848)

| synonyms =

• Amphidromus adamsi (Reeve, 1848) (misspelling of species name)
• Bulimus adamsii Reeve, 1848 (original combination)

}}

Amphidromus adamsii is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Camaenidae. {{WRMS species|1452723|Amphidromus adamsii (Reeve, 1848)|25 March 2025}}

;Subspecies:

• Amphidromus adamsii adamsii (Reeve, 1848)
• Amphidromus adamsii articulatus Fulton, 1896 (type locality: Banggi Island, Sabah, Malaysia).
• Amphidromus adamsii duplocinctus Fulton, 1896 (type locality: Banggi Island, Sabah, Malaysia).
• Amphidromus adamsii inornatus Fulton, 1896 (type locality: North Borneo)
• Amphidromus adamsii luteofasciatus Fulton, 1896 (type locality: Banggi Island, Sabah, Malaysia).
• Amphidromus adamsii ornatus Fulton, 1896 (type locality: Banggi Island, Sabah, Malaysia).
• Amphidromus adamsii rubiginosus Fulton, 1896 (type locality: North Borneo)

:: The shell is imperforate or nearly so, oblong-conic, and rather solid, exhibiting striatulations but hardly any spiral striations. Its color is dead-leaf brown, streaked with darker shades, fading to whitish on the upper part of the last whorl and on the spire. It sometimes features irregularly bent brown stripe markings on the spire and some spots at the periphery, with the suture appearing plain or with a reddish-brown line near it below. The apex is white, sometimes bearing a dark dot. The lip and columella are white, the latter being surrounded by an obscure or blackish area. Comprising six and a half whorls. {{cite book |last1=Tryon, George W., (George Washington), - Baker, H. Burrington (Horace Burrington), - Cooke, C. Montague (Charles Montague), - Hyatt, Alpheus, - Pilsbry, Henry Augustus |title=Manual of conchology, structural and systematic : with illustrations of the species. Second series, Pulmonata |date=1900 |publisher=published by the authors |location=Philadelphia |page=224|edition=2 |url=https://www.biodiversitylibrary.org/item/76490#page/151/mode/1up |access-date=15 May 2025}} {{source-attribution}}

• Amphidromus adamsii rufocinctus Fulton, 1896 (type locality: Borneo)
• Amphidromus adamsii simplex Fulton, 1896 (type locality: Banggi Island, Sabah, Malaysia).
• Amphidromus adamsii subunicolor Fulton, 1896 (type locality: Banggi Island, Sabah, Malaysia).
• Amphidromus adamsii superbus Fulton, 1896 (type locality: Banggi Island, Sabah, Malaysia).

The variety Amphidromus adamsii var. obliquatus E. von Martens, 1903 is a taxon inquirendum,(use in recent literature currently undocumented){{cite journal |last1=Martens |first1=E. von |title=). Land- und Süsswasser-Conchylien von Ost-Borneo |journal=Sitzungs-Berichte der Gesellschaft Naturforschender Freunde zu Berlin. |date=1903 |volume=903 |issue=8 |page=424 |url=https://www.biodiversitylibrary.org/page/7661008 |access-date=12 April 2025}} {{source-attribution}}

==Description==

The length of the shell attains 30 mm, its diameter 16.8 mm.

This shell is characterized by a pale yellow coloration, with the base of the columellar lip displaying a violet hue. A series of oval spots in the same violet color spirals around the convex surface of the body whorl and continues between the spire's whorls, reaching the apex.

The shell is sinistral (reversed), and the pattern of markings is highly variable among individuals. Some specimens are densely covered with spots, while others are entirely a pale straw color.{{cite book |last1=Adams |first1=A. |title=Notes from a journal of research into the natural history of the countries visited during the Voyage of H.M.S. Samarang, under the command of Captain Sir E. Belcher, C.B. In: E. Belcher. Narrative of the Voyage of H.M.S. Samarang, During the Years 1843-46; Empployed Surveying the Islands of the Eastern Archipelago; Accompanied by a Brief Vocabulary of the Principal Languages. Volume II |date=1847 |publisher=Reeve, Benham, and Reeve |location=London |page=482 |url=https://www.biodiversitylibrary.org/page/21979991 |access-date=25 March 2025}} {{source-attribution}}