Amphidromus inversus

• Amphidromus inversus albulus Sutcharit & Panha, 2006
• Amphidromus inversus andamensis (L. Pfeiffer, 1871)
• Amphidromus inversus annamiticus (Crosse & P. Fischer, 1863)

:: (Described as Amphidromus annamiticus) The shell is dextral and imperforate, featuring a thick, slightly convexly conic spire that appears pink above, with a purple suprasutural band near the apex. Comprising seven to seven and a half whorls, the earlier two are convex, with several succeeding whorls being almost flat and slightly marginate above the sutures. The last two whorls are more convex and pale brown with some oblique chestnut streaks, the last whorl abruptly darkening to chestnut beneath. One varix may be present, or none. The aperture is white within, with the recurved edge of the peristome being dark. The parietal callus is white, gradually becoming thin and revealing the chestnut color of the base within. {{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=169|edition=2 |url=https://www.biodiversitylibrary.org/item/76490#page/151/mode/1up |access-date=15 May 2025}} {{source-attribution}}

• Amphidromus inversus fureyi Thach & F. Huber, 2021
• Amphidromus inversus inversus (O. F. Müller, 1774)
• Amphidromus inversus koperbergi Laidlaw & Solem, 1961

Sumatra, Peninsular Malaysia, Thailand

File:Amphidromus inversus (Müller, 1774) (4248353502).jpg

(Original description of Helix inversa in Latin) This Helix possesses a conico-acuminate shell that is sinistral and whitish, displaying reddish streaks and a band, and features a reflected lip.

This is a somewhat larger Helix (land snail) and it exhibits a dextral coiling, sharing similarities in shape and size with Helix recta, but differing in color and the coiling direction of its whorls. The apex of this shell is acute. Its eight whorls coil sinistrally and are marked with reddish streaks drawn obliquely along their length; a broad pale reddish band encircles the shell near the base. The aperture is ovate and white. The outer lip appears pure white and reflected; the inner lip (labium incumbens) presents the same color, while the whorl penetrating the aperture is brown. {{cite book |last1=Müller |first1=O.F. |title=Vermium terrestrium et fluviatilium, seu animalium infusorium, Helminthicorum, et testaceorum, non marinorum, succincta historia. vol 2. |date=1774 |volume=v.2 |publisher=Heineck et Faber, ex officina Mölleriana |location=Havniae et Lipsiae |page=93 |url=https://www.biodiversitylibrary.org/page/12893715 |access-date=26 April 2025}} {{source-attribution}}

(Description by Reeve) The shell is oblong-ovate and rather thick, most frequently coiling sinistrally. It comprises seven convex, smooth whorls with a reflected lip. Its base color is whitish, overlaid with stains and irregularly longitudinal streaks of burnt brown. The lip appears white, while the columella and outer edge of the lip exhibit a purplish-brown hue. {{cite book |last1=Reeve |first1=L.A. |title=Monograph of the genus Bulimus. In: Conchologia Iconica, or, illustrations of the shells of molluscous animals, 5: Pls 1–89 and unpaginated text. |date=1848–1850 |publisher=Reeeve & co |location=London |page=37 |url=https://www.biodiversitylibrary.org/page/8966758 |access-date=26 April 2025}} {{source-attribution}}

File:Amphidromus inversus eggs.jpg

Schilthuizen et al. (2005) described spatial structure of population of Amphidromus inversus in Malaysia.{{Cite journal

| last1 = Schilthuizen | first1 = M.

| last2 = Scott | first2 = B. J.

| last3 = Cabanban | first3 = A. S.

| last4 = Craze | first4 = P. G.

| title = Population structure and coil dimorphism in a tropical land snail

| doi = 10.1038/sj.hdy.6800715

| doi-access = free

| journal = Heredity

| volume = 95

| issue = 3

| pages = 216–220

| year = 2005

| pmid = 16077741

| bibcode = 2005Hered..95..216S

| url = https://figshare.com/ndownloader/files/41101850/1

}}

{{reflist}}

• Maassen, W. J. M. (2001). A preliminary checklist of the non-marine molluscs of West-Malaysia: "a Hand List". De Kreukel, Extra Editie 2001. 1–155
• Yamane, S. & Tomiyama, K. (1986). A small collection of land snails from the Krakatau Islands, Indonesia. Venus, 45 (1): 61-64. Tokyo.

• {{Cite journal | last1 = Schilthuizen | first1 = M. | last2 = Craze | first2 = P. G. | last3 = Cabanban | first3 = A. S. | last4 = Davison | first4 = A. | last5 = Stone | first5 = J. | last6 = Gittenberger | first6 = E. | last7 = Scott | first7 = B. J. | doi = 10.1111/j.1420-9101.2007.01370.x | title = Sexual selection maintains whole-body chiral dimorphism in snails | journal = Journal of Evolutionary Biology | volume = 20 | issue = 5 | pages = 1941–1949 | year = 2007 | pmid = 17714311| pmc =2121153 }}
• {{Cite journal | last1 = Schilthuizen | first1 = M. | last2 = Looijestijn | first2 = S. | doi = 10.4002/040.051.0210 | title = The Sexology of the Chirally Dimorphic Snail SpeciesAmphidromus inversus(Gastropoda: Camaenidae) | journal = Malacologia | volume = 51 | issue = 2 | pages = 379 | year = 2009 | url = https://www.biodiversitylibrary.org/partpdf/386373 }}
• {{Cite journal|last=Sutcharit |first=C. |year=2006|title=A new subspecies of Amphidromus (A.) inversus (Müller, 1774) from Peninsular Malaysia|journal=Journal of Conchology|volume=39|issue=1|pages= 79–83|url=http://www.conchsoc.org/node/4765}}
• {{in lang|nl}} {{cite web|date=19 June 2007 |url=http://www.naturalis.nl/nl/over-ons/pers/persberichten/kurkentrekkers-leiden-tot-slakken-seksschandaal/ |archive-url=https://archive.today/20130223024220/http://www.naturalis.nl/nl/over-ons/pers/persberichten/kurkentrekkers-leiden-tot-slakken-seksschandaal/ |url-status=dead |archive-date=23 February 2013 |language=nl |title=Kurkentrekkers leiden tot slakken-seksschandaal |work=Naturalis }}

• [https://www.biodiversitylibrary.org/page/12893715 Müller, O. F. (1774). Vermium terrestrium et fluviatilium, seu animalium infusorium, Helminthicorum, et testaceorum, non marinorum, succincta historia. vol 2: I-XXXVI, 1-214, 10 unnumbered pages. Havniae et Lipsiae, apud Heineck et Faber, ex officina Molleriana]
• {{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=167|edition=2 |url=https://www.biodiversitylibrary.org/item/76490#page/151/mode/1up |access-date=15 May 2025}} {{source-attribution}}
• [https://doi.org/10.1093/mollus/eyi044Sutcharit, C.; Panha, S. (2006). Taxonomic review of the tree snail Amphidromus Albers, 1850 (Pulmonata: Camaenidae) in Thailand and adjacent areas: Subgenus Amphidromus. Journal of Molluscan Studies. 72(1): 1-30]
• {{cite journal |last1=Sutcharit C, Tongkerd P, Panha S |title=First record on chiral dimorphic population of Amphidromus inversus annamiticus (Crosse and Fischer, 1863) from Thailand |journal=Tropical Natural History |date=2013 |volume=13 |pages=53–57 |doi=10.58837/tnh.13.1.103040 |url=https://li01.tci-thaijo.org/index.php/tnh/article/view/103040|url-access=subscription }}
• [http://www.ne.jp/asahi/dexter/sinister/gallery/species/AmpInv.html photo of sinistral shell]

{{commons category|Amphidromus inversus}}

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inversus

Category:Gastropods described in 1774