Epitonium jukesianum
(Forbes, 1852)
Description:
Dimensions range from 9 mm - 25 mm high and 4.9 mm - 14 mm wide.
Width to height ratio: 0.54:1 ~ 0.56:1
Shell: tall, slender, elongate, narrow; thin; small to moderately small. Exterior colour white to pale purple- brown, costae white. About 14 whorls, rounded, rather flattened, connected, distinct at the suture; protoconch with ~3 whorls elongately turbinate, smooth, glossy, pale brown; teleoconch with 7-11 whorls convex. Spire elevated. Suture deeply impressed, or shallow. Imperforate: umbilicus closed, and no umbilical rib. Approximately 9 - 28 costae on the body whorl. Costae are lamelae close, simple ribs, varices numerous, rather laminar, nearly equal, thin, some thickened, sharp-edged. Costae upright, with a slight hook below suture; rolled back on top, reflected at the edge; usually continuous from whorl to whorl. Intercostal spaces are smooth and shining, may be very minutely spirally striated. Base last whorl encircled with a small distinct keel. Columella arched. Aperture ovate; peristome just complete; outer lip with normal rib externally, rather thin, incomplete; inner lip crossing as a glaze only to meet the outer lip. Operculum corneous.
Distinguished from Epitonium aculeatum (G. B. Sowerby II, 1844) by its very fine and much more numerous axial ribs.
Distribution:
New Caledonia [Tryon, 1887: 69]; Australia and New Zealand. In Australia, Keppel Bay Queensland, NSW southwards around southern Australia to south western WA, including Tasmania [Beechey, 2008]
Habitat:
intertidal [Weil et al., 1999:130], buried in sand, associated with sea anemones [Beechey, 2008], Common. Beach shell-sand
Etymology:
It is dedicated to J. Beete Jukes, the author of 'The Voyage of the Fly' which detailed the surveying voyage of coastal Australia. Jukes' account is particularly significant for his description of the Queensland coast, the Great Barrier Reef, and the Torres Strait
Type Material:
Holotype: AMS C.60645 [as Acutiscala ampacta Iredale, 1936:] - Locality: Sydney Harbour, New South Wales.. [Brown, L. & Neville, B.D., 2015]
Syntypes: NHMUK 1870.10.26.103 [as Scalaria delicatula Crosse & P. Fischer, 1864:] - Locality: St. Vincent, South Australia.. [Brown, L. & Neville, B.D., 2015]
Type not located. [as Scala delicatula H. Adams, 1869: ~ Scala tenera H. Adams, 1873.] - Locality: Lancerote. [Brown, L. & Neville, B.D., 2015]
Type not located. [as Acutiscala fabia Iredale, 1936:] - Locality: Sydney Harbour, New South Wales.. [Brown, L. & Neville, B.D., 2015]
Holotype: NHMUK 1851.11.24.13 [as Scalaria jukesiana Forbes, 1852: ~ Acutiscala ampacta Iredale, 1936.] - Locality: none given.. [Brown, L. & Neville, B.D., 2015]
Type not located. [as Scalaria wellingtonensis Kirk, 1880] - Locality: Wellington, New Zealand.. [Brown, L. & Neville, B.D., 2015]
Forbes, E. (1852). Plate iii. Fig. 7.
Distribution
as listed in source literature
Forbes, E. (1852).
Plate iii. Fig. 7.
pp: 383.
Original description
Sowerby, G. B. II. (1873-1874).
Shown in text as SCALARIA DELICATULA.
Plate xv. Fig. 115.
Sowerby, G. B. II. (1873-1874).
Plate xi. Fig. 80.
Kirk, T.W. (1880).
Shown in text as Scalaria wellingtonensis T. W. Kirk, 1880
pp: 307.
Watson, R.B. (1886).
pp: 139.
Tryon, G.W. (1887).
Shown in text as Scalaria jukesiana Forbes, 1852 and, Scalaria wellingtonensis T. W. Kirk, 1880
Plate 14. Fig. 20.
pp: 66.
Tryon, G.W. (1887).
Shown in text as Scalaria delicatula Crosse & P. Fischer, 1864 ·
Plate 14. Fig. 39.
pp: 69.
Clessin, S. (1897).
Plate 5. Fig. 1.
pp: 18.
Shell small, white, imperforate, with an elevated spire; nine whorls, distinctly set off at the suture; numerous varices, somewhat lamellar, nearly uniform; aperture ovate, outer lip rather thin, columella arched.
Clessin, S. (1897).
Shown in text as Scalaria delicatula Crosse & P. Fischer, 1864
Plate 11. Fig. 5.
pp: 38.
Shell thin, pointed, very finely spirally striated; whorls numerous, rounded; ribs unequal, mostly lamellar, some thickened, simple at the suture; the last whorl encircled by a small, distinct keel.
Clessin, S. (1897).
Shown in text as Scalaria wellingtonensis T. W. Kirk, 1880
Plate 14. Fig. 3.
pp: 53-54.
Shell small, pyramidal, imperforate, somewhat solid, whitish; whorls 7-8, growing slowly and regularly, rounded, separated by a deep suture, closely contiguous; varices numerous, sharp; aperture ovate.
Verco, J.C. (1906).
pp: 144. Plate jukesiana.
jukesiana
Cotton, B.C. & Godfrey, F.K. (1931).
pp: 6.
Iredale, T. (1936).
Shown in text as Acutiscala fabia, sp. novo
Plate xxii. Fig. 8.
pp: 298. Plate xxii.
Iredale, T. (1936).
Shown in text as Acutiscala ampacta, Sp. novo
Plate xxii. Fig. 7.
pp: 298. Plate xxii.
Macpherson, J.H. & Gabriel, C.J. (1962).
pp: 116. Fig. 143.
pp: 117.
Kaicher, S.D. (1980).
Card #: EP1-2319.
BMNH type collection 1851.11.24.13
Kaicher, S.D. (1981).
Shown in text as Epitonium ampactum (Iredale, 1936)
Plate ard #: EP2-3064.
Holotype: Australian Museum C 60645
Wilson, B.R. (1993).
Shown in text as Epitonium delicatulum (Crosse, 1864)
pp: 379. Plate 44. Fig. 15.
plate 44 fig 15
Epitonium delicatulum (Crosse & P. Fischer, 1864)
Wilson, B.R. (1993).
pp: 379. Plate plate 44. Fig. 22.
Wilson, B.R. (1993).
Shown in text as Epitonium fabia (Iredale, 1936)
pp: 277.
Epitonium fabaia (Iredale, 1936)
Beechey, D. (2008).
pp: Epitonium jukesianum. Fig. 1.
Gunnamatta Bay, NSW (C.335907)
