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The Family Trochidae (Mollusca: Gastropoda) in the Sydney Metropolitan Area and Adjacent Coast

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The Family Trochidae (Mollusca: Gastropoda) in the Sydney Metropolitan Area and Adjacent Coast The family Trochidae (Mollusca: Gastropoda) in the Sydney metropolitan area and adjacent coast Patty Jansen Tarthost 1109, 6708 JL Wageningen, the Netherlands ABSTRACT Twenty-five species of Trochidae from the Sydney metropolitan area are discussed here: Herpetopoma aspersa (Philippi, 1846), Vaceuchelus ampullus (Tale, 1893), Granata imbrlcata (Lamarck, 1822), Cla~CUlus(Euriclanculus) brunneus A. Adams, 1853. Clancuius (Euriclanculus) floridus Philippi, 1848, Clanculus (Euclanculus) clanguius (Wood, 1828). Clancuius (Mesoclancuius) plebejus Philippi, 1851, Clancuius (isoclanculus) undatoides T. Woods. 1879, Clanculus Downloaded from http://meridian.allenpress.com/australian-zoologist/article-pdf/29/1-2/49/1475203/az_1993_004.pdf by guest on 02 October 2021 (Macroclancuius) maugeri Wood, 1828, Austrocochlea concamerata (Wood, 1828). Austrocochlea constricts (Lamarck, 1822), Notogibbula bicarinata (A. Adams, 1854). Eurytrochus strangei (A. Adams, 1853), Cantharidella picturata (A. Adams and Angas, 1864), Fossarina patuia (A. Adams and Angas, 1863). Phasianofrochus eximius (Perry, 181 1). Odontotrochus indistinctus (Wood, 1828), Gena lmperiusa (Burrow, 1815). Cailiostorna (Fautor) cornptum A. Adams, 1854, Astelena scifuia (A. Adams, 1855), Ethminoiia probabilis lredale, 1924, Talopena gloriola iredale, 1929, Monilea callifera (Lamarck, 1822), Bankivia fasciata (Menke, 1830) and Leiopyrga lineolaris (Gould, 1861). The use of the name Odontotrochus indistinctus for the species formerly referred to as Thalotia marginata T. Woods, 1879 or T. comtessei lredale, 1931 is new. INTRODUCTION where shells could be Cound, the sites were classified as exposed, sheltered ocean, or The Sydney metropolitan area has a varied estuarine shores. This was done subjectively, coastline composed of many habitats. A great on the basis of exposure to surf. Exposed ocean variety of marine molluscs have been described shores were those receiving the lull force of from this area. The latest checklist of marine surf; sheltered ocean beaches were those pro- molluscs of New South Wales (Iredale and tected from the surf, but are situated on the McMichael 1962) records 2 063 species, includ- open ocean; and estuarine shores were those ing 54 species of Trochidae. However, for well within bays and exposed to minimal surf. today's shell-enthusiasts, it is very hard to identify shells found in the Sydney area as the The classification and number of times col- available popular literature is grossly lecting sites were visited are shown in Table 1; inadequate; a reference book on marine Figs 1 and 2 show the location of the collecting molluscs of the Sydney area, especially the sites. smaller ones, is yet to be published. One Collecting was mainly carried out on family, where this is evident, is the Trochidae. beaches. It was considered undesirable to Many species that can commonly be found on collect live animals as this survey did not beaches or intertidal rock Hats have been include studies of the animals themselves. omitted from recent popular literature and, in Sometimes, live shells were included in the order to identify them, it may be necessary to survey results, and this is indicated by the go back to the original descriptions. The aim phrase "observed live". of this article is to identify and describe 25 The identification of shells was made with species of Trochidae that can be found on the aid of publications by Wilson and Gillett beaches or intertidally in the Sydney (1985), Macpherson and Gabriel (1962), metropolitan area and adjacent coasts, and to Hinton (1981), May (1923), Short and Potter describe the habitats in which they are likely to (1987), or literature containing original be found. descriptions of shells, and by comparing shells with those held in the collection of the Aust- METHODS ralian Museum. The arrangement of the species in subfamilies follows Hlckman and The shells were collected between June 1988 McLean (1990). The genera Vaceuchelw, Eu9- and July 1991. A range of locations in different trochw, Astelena, the subgenus Fautor and the habitats were visited. Some collecting sites were subgenera of Clanculw were not specified by visited only once, while repeated visits were these authors. They have, however, been made to others. To identify the type of habitats Australian Zoologist. Vol. 29(1-2) 49 Table I. Collecting sites in the Sydney metropolitan area and adjacent coasts. habitats and the number of times each site was virired. Abbreviation and Number of Location fieure No. Habitat times visited Airport es~uarinelsandy Bulli exposed oceanlrocky Bradley's Head esruarinelrocky Callala Bay rhelrered oceanlrockr~ Clavelly exposed oceanlrocky Cronulla - exposed oceanlsandy Cronulla's Shelly Beach CSB exposed oceanlrocky Dee Why DW exposed oceanlsandyirocky Dolls Point DP estuarinelsandy Foreshore Road FR csruarinelsandy Huskisson sheltered oceadrocky K sheltered aceadrocky to estuarinelsandy Kurnell Downloaded from http://meridian.allenpress.com/australian-zoologist/article-pdf/29/1-2/49/1475203/az_1993_004.pdf by guest on 02 October 2021 -~~- LP sheltered oceanlrockv Long Reef LR Manly's Shelly Beach MSB M Narrabeen NB exposed oceanlrocky Newcastle Town Beach NTB exposed oceanirocky Newport NP exposed oceanlrocky Norah Head NH exposed oceanlrocky Pretty Beach PB eatuarinelsandy Shellharbour SH sheltered oceadrocky Yarra Rav YB estuarinrlsandv accepted as valid by Cunningham-Vaught Colour light brown or pink with numerous (1989) and were used in accordance with the irregular red or brown spots. Inside iridescent. arrangement of the species in the collection of Locations: Newcastle Town Beach, Norah the Australian Museum. Head, Manly's Shelly Beach, Kurnell, Shell- Illustrations of the species were provided harbour. when they were not illustrated in Wilson and Habitat and distribution: This species was Gillett (1979), Hinton (1981), Macpherson and observed live intertidally under stones on Gabriel (1962), Short and Potter (1987), or exposed and sheltered rocky shores. The shell when it was thought that identification would is extremely common on beaches. It occurs be facilitated if an illustration of the shell was from southern Western Australia to Northern provided. Comments on the habitat and New South Wales including Tasmania. distribution of species were based on the author's observations. All shells are currently Reference: Wilson and Gillett (19853, p. 38. held by the author. Vacacchelus ampullus (Tate, 1893). (Plate 1, fig. 5) Collecting results This is closely related to the previous species, Subfamily Eucyclinae but it is relatively unknown. Herpelopoma mpersa (Philippi, 1846). Largest diameter up to 10 mm; height and width about equal. Spire of medium height. This is a well-known species. Greatest diameter ~~~thoccupying one half of the total length of shell UP to 15 mm, but mostly smaller; of the shell; mouth almost circular. Sculpture height and width about equal. Whorls on the body whorl consisting of seven spiral rounded; mouth almost circular, occupying ribs. the to^ four of which are stronp and a half the length of the shell. Sculpture cinsist- Drokinent. ;he last three are on the base of the ing of fine spiral ribs, about 15~0x1the body shell and 'less pronounced. These ribs are whorl, depending on the size of the shell. The crossed by longitudinal ribs, which are most ribs have a rough appearance and are crossed prominent in the interstices between the spiral by fine growth lines. The ribs are usually as ribs. Outer lip and columella smooth, no wide as the interstices between them. Outer lip umbilicus presgnt. crenulated; inside of the shell ribbed. Columella smooth except for a small tooth Colour off-white to pink. The spiral ribs bear near the base of the shell; no umbilicus irregular red spots. present. Locations: Norah Head, Narrabeen. 50 Australian Zwlogist, Val. 29(1-2) August 1993 Downloaded from http://meridian.allenpress.com/australian-zoologist/article-pdf/29/1-2/49/1475203/az_1993_004.pdf by guest on 02 October 2021 Fig. I (left). Collecting sires in the Sydncy tnetlapolitan area. See Table 1 for abbreviations. Fig. 2. (aboue). collect in^ sites nonh and south of the Sydney metropolitan area. See Table 1 for abbreviations. Habitat and distribution: This species was wide, but mostly smaller, height seldom found only on rocky ocean shores. It seems exceeding 10 mm. Spire flat; mouth occupying that it is rare as a total of only three specimens two thirds of the total shell length. Mouth wide were found; live animals were not observed. It and almost circular when observed from the occurs in southern Western Australia, New underside of the shell. Sculpture consisting of South Wales and Queensland; the Australian many fine spiral cords, mostly wider than the Museum does not have any specimens from interstices between them, crossed by longitudinal Victoria. ribs, forming small scales on the spiral cords. Reference: Tare (1893). Outer lip crenulated; columella smooth and curved; no umbilicus present. Inside of the Granala imbrzcata (Lamarck, 1822) shell ribbed. There has been some confusion as to where Colour off-white to light brown, with brown this species should be placed, although a spots on the spiral ribs. Inside iridescent. number of authors have placed it in the genus Locations: Newport, Manly's Shelly Beach, Slommtella in the subfamily Stomalellznae. Recent Kurnell. publications, however, have put it in the genus Habitat and distribution: Shells are common Granala (Hickman and McLean 1990). The on rocky
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