| Oligohalinophila dorri | |
|---|---|
 | |
| Oligohalinophila dorri shell | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Nassariidae |
| Genus: | Oligohalinophila |
| Species: | O. dorri |
| Binomial name | |
| Oligohalinophila dorri | |
| Synonyms | |
| |
Oligohalinophila dorri is a species of brackish water snail, with gills and an operculum, a gastropod mollusc in the family Nassariidae, the nassa mud snails or dog whelks. [2]
This species was described under the name Canidia dorri by Gustave-Éduard Joseph Wattebled in 1886. [1] Two syntypes are stored in National Museum of Natural History in Paris. [3] The specific name dorri is in honour of captain Émile Dorr (1857-1907) who collected type specimens in North Central Coast region of nowadays Vietnam. [1]
This species was not reported since 1886 until 2001. [3] Kantor & Kilburn (2001) [3] reported on the rediscovery of Nassodonta dorri, described the shell, radula and provided some preliminary anatomical observations based on a single, poorly preserved female, and discussed the family placement of the genus. [4] They also moved this species to the genus Nassodonta within Nassariidae. [3] There was Nassodonta insignis as the only species within the genus Nassodonta. [3]
Simone (2007) [5] provided a description of the external anatomy, proboscis musculature and radula, based on semi-mummified specimens. [4]
Strong et al. provided anatomical and molecular phylogeny analysis and placed it into the newly established subfamily Anentominae and they confirmed the placement of this species within family Nassariidae. [4]
In 2019 Neiber M.T. & Glaubrecht M. moved this species to a new genus Oligohalinophila in the subfamily Anentominae. [6]
Distribution of Oligohalinophila dorri include Vietnam: lagune de Kao-hai near Huế, Thừa Thiên-Huế Province, Central Vietnam [3] and Phan Ri River, Bình Thuận Province, Southeast Vietnam. [4] It was also reported as abundant species from Nha Trang, Khánh Hòa Province in South Central Coast and from Phan Rang–Tháp Chàm, Ninh Thuận Province. [3]
The type locality is lagune de Kao-hai near Huế. [1]
The shell is thick. [3] The shape of the shell is oblong-ovate. [3] The shell has 2.25 distinctly shouldered whorls. [4] [3] The spire is low and obtuse. [3] The body whorl is subcyrindrical. [3] The width of the shell is 8.0-9.6 mm. [3] Shell length is 12.0-14.9 mm. [3]
 |  |
Operculum is thin, elongate, oval with basal nucleus. [4] The length of the operculum is 5.7 mm. [3]
Head is small and broad, with very short, thick cephalic tentacles. [4] Eyes are slightly elevated on prominent ocular peduncles at tentacle outer bases. [4] Foot is broad, fleshy, overlapping sides of operculum in preserved specimens. [4] Frontal part of the foot (propodium) is narrow with posterior extent marked by indistinct notch, poorly demarcated from mesopodium. [4] There is shallow propodial pedal gland along anterior edge, with two histologically distinct subepithelial gland cells. [4] Metapodium has no posterior tentacles. [4]
 ag, albumen gland; au, auricle; c, caecum; ct, ctenidium; dg, digestive gland; ebv, efferent branchial vein; f, foot; hg, hypobranchial gland; kd, kidney; ngl, nephridial gland; op, operculum; ov, ovary; ppg, propodial pedal gland; r, rectum; si, siphon; v, ventricle. |  ov, ovary; c, caecum; dg, digestive gland; cm, columellar muscle; ag, albumen gland; cg, capsule gland; r, rectum; ct, ctenidium; os, osphradium; f, foot; p, propodium; t, cephalic tentacle; si, siphon. |
Mantle cavity is short, less than one-half whorl in length. [4] There is reno-pericardial complex just behind the mantle cavity. [4] Mantle cavity is slightly asymmetrical, slightly deeper at left side in front of pericardium. [4]
Reproductive system: has separate sexes (i.e. these snails are dioecious). [4]
Females: ovipositor is forming deep, simple pore surrounded by weakly developed subepithelial glands. [4]
Oligohalinophila dorri live in lower parts of rivers. [3] Reported depth is about 3 m. [3] This species lives in turbid brackish waters and is capable of withstanding a wide range of salinities. [4]
This article incorporates CC-BY-4.0 text from the reference [4]
