Oligohalinophila dorri
Oligohalinophila dorri shell
Scientific classification
Kingdom:
Phylum:
Class:
(unranked):
Superfamily:
Family:
Subfamily:
Anentominae
Genus:
Species:
O. dorri
Binomial name
Oligohalinophila dorri
(Wattebled, 1886)[1]
Synonyms
  • Canidia dorri Wattebled, 1886
  • Nassodonta dorri (Wattebled, 1886)

Oligohalinophila dorri is a species of brackish water snail, with gills and an operculum, a gastropod mollusk in the family Nassariidae, the nassa mud snails or dog whelks.[2]

Taxonomy

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

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]

Description

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]

Apertural view of a shell of Oligohalinophila dorri.
Abapertural view of a shell of Oligohalinophila dorri.

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]

Apertural view of anatomy of Oligohalinophila dorri.
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.
Abapertural view of anatomy of Oligohalinophila dorri.
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.
SEM photo of radula of Oligohalinophila dorri. Scale bar is 100 μm.

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]

Ecology

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]

References

This article incorporates CC-BY-4.0 text from the reference[4]

  1. 1 2 3 4 Wattebled G. (1886). "Description de mollusques inédits de l'Annam. Récoltes du capitaine Dorr aux environs de Hué". Journal de Conchyliologie 34: 54-71, page 58, plate 3, fig. 5
  2. MolluscaBase eds. (2021). MolluscaBase. Oligohalinophila dorri (Wattebled, 1886). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1339017 on 2021-09-14
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Kantor, Y. I., & Kilburn, R. N. (2001). "Rediscovery of Canidia dorri Wattebled, 1886, with discussion of its systematic position (Gastropoda: Neogastropoda: Nassariidae: Nassodonta)". Nautilus 115(3): 99-104.
  4. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Strong, E. E., Galindo, L. A., & Kantor, Y. I. (2017). "Quid est Clea helena? Evidence for a previously unrecognized radiation of assassin snails (Gastropoda: Buccinoidea: Nassariidae)". PeerJ 5: e3638. doi:10.7717/peerj.3638.
  5. Simone L. R. L. (2007). "Family Pseudolividae (Caenogastropoda, Muricoidea): a polyphyletic taxon". American Malacological Bulletin 23(1): 43-78.
  6. Neiber M.T. & Glaubrecht M. (2019). Oligohalinophila, a new genus for the brackish water assassin snail Canidia dorri Wattebled, 1886 from Vietnam (Buccinoidea: Nassariidae: Anentominae). Journal of Molluscan Studies. 85(2): 280-283
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