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Species / Dolomena Wienekei

Stromboidea


Original Description of Dolomena wienekei by Wiersma & Monsecour, 2012, p. 38:

  • "Shell rather small for genus (largest specimen known: 40.2 x 23.5 mm, coll. D. Monsecour), bulbous in outline with a wide, flaring lip. Protoconch multispiral, consisting of 2 - 3 1/3 bulbous, semi-translucent, white or beige whorls (damaged in all studied specimens). Transition to teleoconch smooth, marked by the appearance of both axial and spiral sculpture. Teleoconch consisting of 7 strongly shouldered whorls. Onset of first teleoconch whorl with 6-7 flattened spiral cords, interspaces shallow, as broad as spiral cords. Further 1-2 spiral cords appearing near suture after whorl and continuing for about 1 more whorl, then fading out and disappearing, due to stronger axial sculpture, yet recurring on final whorl. Axial sculpture strongly developed, consisting of numerous, close-set cords on upper 5 teleoconch whorls, rendering the effect of granules at intersections with spiral sculpture on upper 4 teleoconch whorls. On penultimate whorl and last whorl, the axial sculpture is flattened between the shoulder and the suture of the preceding whorl. Shoulder of penultimate whorl and last whorl with rounded knobs: 21-26 on penultimate whorl and 7-8 on last whorl. On the penultimate whorl, these knobs extend downwards as axial cords towards the suture of the last whorl, whereas they only extend towards about midwhorl on the dorsal part of the last whorl. Ventral part of last whorl smooth, somewhat thickened and with strong rim running down from last axial knob towards lower columella. Onset of lip between shoulder and upper suture of the penultimate whorl, marked by a small, open, straight canal. Strong dorsal rim from onset of lip down to siphonal canal. Lip wide, flaring, sloping down from onset towards strongly thickened end at same height as shoulder of last whorl; then turning towards siphonal canal, rendering a triangular overall outline. Lip internally with 29-33 lirae along entire lenght, running from outer lip towards thickened rim at same height of dorsal rim. Columella with thickened callus with 24-29 lirae along entire length. Lirae in centre of callus less developed, sometimes only visible under magnification. Stromboid notch wide, shallow. Siphonal canal short, halfopened, straight. Colour off-white to beige, sometimes with an interrupted white spiral band on lower half of last whorl. Knobs on shoulder of penultimate whorl and last whorl white. Inner lip, columella white. Outer lip with pinkish orange edge. Operculum, periostracum and animal unknown."

Locus typicus: Kimbe Plantation, northern coast of New Britain Island, Bismarck Archipelago, Papua New Guinea. On sand with sparse weed at 3-5 metres

Types: "Holotype: 28.1 x 17.9 mm. Coll. Naturalis, Leiden, The Netherlands. Collection nr. RMNH.MOL.199338; Paratype 1: 29.0 x 18.5 mm, coll. Joop Wiersma 03.24(8); Paratype 2: 26.9 x 17.8 mm, coll. Gijs C. Kronenberg, nr. 6339 (Eindhoven, The Netherlands); Paratype 3: 24.9 x 16.9 mm, coll. D. Monsecour; Paratype 4: 30.2 x 18.8 mm, coll. Ulrich Weineke (Murnau, Germany); Paratype 5: 33.8 x 21.2 mm, coll. A. Dekkers (Blokker, The Netherlands); Paratype 6: 25.9 x 16.6 mm, coll. K. De Turck (Herzele, Belgium); Paratype 7: 38.8 x 24.9 mm, coll. D. Monsecour.

Dolomena wienekei Wiersma & Monsecour, 2012; Holotype; Kimbe Plantation, northern coast of New Britain Island, Bismarck Archipelago, Papua New Guinea; On sand with sparse weed at 3-5 metres (type locality); 28.1 x 17.9 mm
Coll. NCB Naturalis no. RMNH.MOL.199338.

Dolomena wienekei Wiersma & Monsecour, 2012; Paratype 2; Kimbe Plantation, northern coast of New Britain Island, Bismarck Archipelago, Papua New Guinea; on sand with sparse weed by diver
Coll. Gijs Kronenberg no. 6339


History and Synonymy

1965

Strombus labiosus in Cernohorsky, 1965, pl. 3, fig. 13

Cernohorsky, 1965, p. 7, 8: cite Strombus labiosus Wood, 1828 as rare in Fiji islands, giving differences from normal labiosus and saying "Specimens of S. labiosus from the Pacific may prove to be subspecifically separable." The two images in plate 3 are not separable from Dolomena wienekei.

1982

Ladd, 1982, p. 35:

  • "Two typical specimens from river debris (station SG79) on the Sarakata River, Santo, New Hebrides, are probably Pleistocene in age. The figured shell measures: length 44,8 mm, diameter 25,3 mm. As Abott pointed out. this species is characteristic of the western Indian Ocean area. Shells in the National Museum collection, however (No. 609962), are from New Caledonia. Abbott (1960) questioned the Vredenberg report of an occurence in the Gaj beds (upper Miocene) in West Pakistan."

Strombus (Dolomena) plicatus columba in Ladd, 1982, pl. 4, fig. 11, 12

  • Comment Wieneke: "This does not look like a D. columba sensu Sowerby, it seems to be a separate species closely related to D. wienekei

Specimens from private collections

Dolomena wienekei Wiersma & D. Monsecour, 2012; Coll. Virgilio Liverani

  1. Kokopo, Rabaul, East New Britain, Papua New Guinea; 120 ft steep slope, black muddy sand; 4/1977; 35 mm
  2. Honiara, Guadalcanal Island, Guadalcanal Province, Solomon Islands, south-western Pacific; 31 mm
  3. Honiara, Guadalcanal Island, Guadalcanal Province, Solomon Islands, south-western Pacific; 35 mm

Dolomena wienekei Wiersma & D. Monsecour, 2012; Kor (? may be typo for Koh) Bon Island, West Thailand; 30 ft deep; Coll. Ulrich Wieneke

Dolomena wienekei Wiersma & D. Monsecour, 2012; Thailand (?); Coll. Ulrich Wieneke


References

  • Cernohorsky, 1965
  • H.S. Ladd, 1982. Cenozoic Fossil Mollusks from Western Pacific Islands; Gastropods (Eulimidae and Volutidae through Terebridae), Geological Survey Professional Paper 1171, United States Government Printing Office, Washington. fulltext
  • Wiersma, J.; Monsecour, D. (2012). Dolomena wienekei, a new species within the Dolomena labiosa (Wood, 1828) complex (Gastropoda: Strombidae) Gloria Maris 51(2-3): 36-41
  • Wiersma J. & Monsecour D. (2012) Rectification of the description of Dolomena wienekei Wiersma & Monsecour, 2012. Gloria Maris 51(4): 97-98. [9 September 2012]

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