Figs 20-22 - uploaded by Henk H. Dijkstra
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Pecten sulcicostatus Sowerby,1842: HD 3669, False Bay, ca. 40 m, pv, 72.9 x 80.9 mm. 20. LV exterior. 21. LV interior. 22. RV exterior.
Source publication
Of the 29 species of Pectinidae here recorded from South Africa and Mozambique, ca. 76% have Indo-West Pacific origins, 17% are of Mediterranean-West African origin and ca. 7% are probably of Southern Ocean origin.
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Background
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Citations
... Family Ungulinidae Gray, 1854 Genus Transkeia Huber, 2015 Type species: Ungulina scleractinica Kilburn, 1996, by original designation. Leadsman Shoal, Province of KwaZulu-Natal, South Africa. ...
... It is easily distinguished from Transkeia scleractinica (Kilburn, 1996), the type species of the genus Transkeia from off KwaZulu-Natal, South Africa, by having a larger, lower and less inflated shell with more irregular commarginal sculpture on the external surface. ...
... l.) karatsuensis (Nagao, 1928b), Volutospina japonica (Nagao, 1928b), Saccella sp., Callista matsuraensis (Nagao, 1928b) and Columbarium sp. Felaniella Zemysia Finlay, 1926 Transkeia satparaensis Preston, 1915 ; Transkeia raveyensis Sturany, 1899 ; concentrischer Punktstreifung Transkeia Huber, 2015 Transkeia scleractinica Kilburn, 1996 ; Diplodonta semiasperoides Nomura, 1932 Cyclinella? compressa Nagao, 1928b - ...
A new ungulinid bivalve species, Transkeia sagaensis n. sp, is described from the uppermost Eocene-lowest Oligocene Kishima Formation in Kyūshū, southwestern Japan. The present new species is the oldest member in the genus Transkeia Huber, 2015. In the previous molluscan studies of the formation, no ungulinid species have been recognized. This is probably due to the misidentification to a venerid, Cyclinella? compressa (Nagao, 1928b).
... According to the MolluscaBase, the tribe Aequipectinini has the highest specific diversity (49) within the subfamily Pectininae. Although the validity of some genera (Para leptopecten Waller, 2011, Perapecten Wagner, 1985, and Linda pecten Petuch, 1995 and the inclusion of Serratovola Habe, 1951, and Volachlamys Iredale, 1939, were questioned (Huber 2015Dijkstra and Kilburn 2001;Dijkstra 2013;Dijkstra and Beu 2018), it is mostly accepted that the tribe Aequipectinini unites 15 genera, occurring from Neogene to Recent times (Table 1). ...
... Grau (1959) erroneously had considered Pecten commu tatus as the type species of Argopecten, but Waller (1969: 34-34) separated it from that genus, stating that Argopecten is an American taxon. Dijkstra and Kilburn (2001) erected Aequipecten commutatus peripheralis (NMSA E8964) and considered Perapecten as a junior synonym of Aequipecten. Perapecten belongs in the tribe Aequipectinini because it has longer than high, prosocline shells, with auricles nearly equal in length, valves sculptured with a uniform number of undivided radial plicae throughout ontogeny, and commarginal lamellae frequently developed on interspaces. ...
... The scallop Pecten sulcicostatus (Sowerby, 1842) is endemic to the inner shelf of the south and southwest coasts of South Africa. As one of the 29 species of Pectinidae occurring off the southern African coast, it is the only species large enough to be considered for commercial harvest (Dijkstra & Kilburn 2001). Exploratory fishing for P. sulcicostatus in 1972 showed exploitable animal densities in False Bay, but the total population size was considered insufficient to support a sustained fishery (De Villiers 1976). ...
Reproductive condition of Pecten sulcicostatus from False Bay, South Africa, was assessed monthly from August 2010 to November 2011 by determining the gonadosomatic index (GSI) and by monitoring associated histological changes within the gonads. Simultaneous measurement of temperature and chlorophyll a concentrations at the site of scallop collection provided insight into the conditions controlling the reproductive cycle. Direct spawning induction was also attempted monthly, using four spawning techniques: desiccation, food deprivation, thermal shock, and intragonadal injection of the hormone serotonin. The reproductive cycle of P. sulcicostatus demonstrated seasonality in that the GSI was highest from June to September. An increase in bottom temperatures through winter and spring is a likely factor inducing spawning. The highest phytoplankton biomass in summer and autumn is likely to contribute to the winter buildup of gonads. Injection of serotonin was the only method that successfully induced spawning. Gametogenesis occurred in all months, except that oocytes were not released in November and December. © 2018 National Shellfisheries Association. All rights reserved.
... Many species of the family Pectinidae inhabit the deep waters of the bathyal (200-3000 m) and abyssal (3000-6000 m) zones of the World Ocean ( Schein, 1989;Coan et al., 2000;Okutani, 2000;Dijkstra & Kilburn, 2001;Allen, 2008;Dijkstra & Maestrati, 2008;Dijkstra & Marshall, 2008;Huber, 2010;Dijkstra, 2013). Thirty-eight species of this family have been recorded in the deep Atlantic at depths greater than 500 m. ...
Three new species of the genus Hyalopecten (Bivalvia: Pectinidae) from the abyssal and hadal zones of the Northwestern Pacific Ocean gennady m. kamenev A.V. Zhirmunsky Institute of Marine Biology of the Far Eastern Branch of the Russian Academy of Sciences, Palchevskogo St., 17, Vladivostok 690041, Russia Three new species, Hyalopecten vityazi sp. nov., H. abyssalis sp. nov. and H. kurilensis sp. nov., are described from the abyssal and hadal zones of the Northwestern Pacific. Hyalopecten vityazi was found in the Kuril-Kamchatka and Aleutian trenches at 6090– 8100 m depth. It is the most deep-water species of the order Pectinida. Hyalopecten abyssalis and H. kurilensis were found at the abyssal plain adjacent to the Kuril-Kamchatka and Aleutian trenches at 4550 –5045 m depth. To date, 13 species of the genus Hyalopecten are known from different regions of the World Ocean. A table with the main differences among all known species in the genus is provided.
... Dijkstra's body of work has primarily focused on alpha taxonomy (e.g. Dijkstra, 1986Dijkstra, , 1988Dijkstra, , 1989Dijkstra, , 2008Dijkstra and Roussy, 1994;Dijkstra and Kilburn, 2001) and is the result of a coordinated effort with large research expeditions organised by the Muséum National d'Histoire Naturelle de Paris (Dr Philippe Bouchet) and the French research organisation, the Institut de recherché pour le développement (IRD), and collection holdings of Dijkstra's home institution, the Naturalis Biodiversity Center, Leiden (previously the Zoological Museum, University of Amsterdam). Thus, much of Dijkstra's work has focused on taxa of the tropical Indo-Pacific Ocean. ...
Scallops (Pectinidae Rafinesque, 1815) are one of the most morphologically, behaviourally and biologically diverse family of bivalved molluscs, but lack a well-supported, comprehensive phylogenetic hypothesis. The results from early molecular phylogenetic analyses of the Pectinidae appeared to be congruent with morphologically based classification systems and gave researchers a false sense that the relationships within the scallops were predictable and robust; however, as molecular phylogenetic studies have increased the number of species sampled and taxon density, lineages that appear to share similar morphological traits formed unanticipated relationships with other species, indicating a great deal of morphological convergence. This review examines the conflicts between morphological-based and molecular phylogenetic hypotheses of the Pectinidae. The first section describes the characteristics of scallops, by defining the traits unique to the family and provides background on the ecological and phenotypic diversity of the group. Through a review of previous work, the second section explains how this morphological diversity was used to develop a classification system for the Pectinidae and shows how these systems are affected by convergent evolution of the shell. The third section describes how molecular phylogenetics can add to our understanding of scallop relationships and evolution, reviews the last decade of phylogenetic study on the Pectinidae and provides a case study. The chapter ends with some thoughts about what still needs to be done to address long-standing issues in scallop phylogenetics including determining the evolutionary origin of the Pectinidae, how to better estimate biological diversity in the family, and methods to incorporate extant and extinct taxa in a comprehensive phylogenetic hypothesis for the scallops.
... Their occurrences revealed a nearshore shallow marine origin (Pufahl and James, 2006). Most species of pectinids are living in relatively shallow waters from the low tide line to 100 m (Dijkstra and Kilburn, 2001). The common occurrences of the echinoderm (Scutella sp.) may imply shallow marine water and period of relatively agitated conditions (Kroh and Nebelsick, 2003). ...
The present study investigated the epifaunal, free lying
bivalve Placuna (Indoplacuna) miocenica (Fuchs, 1883) encountered in the
Middle Miocene Marmarica Formation of Siwa Oasis, Western Desert, Egypt,
in terms of systematic paleontology, paleoecology and taphonomy. Well to
moderately preserved shells of this species were collected from three
sections. They have been found embedded in sandy, marly and chalky
limestones. Although they are extremely thin and fragile, they occurred
as complete disarticulated and articulated valves. Specimens of P. (I.)
miocenica are highly accumulated in the north Siwa section forming a
coquinoid band (30cm thick.). In addition, they are generally distributed
sporadically in different stratigraphic levels within the three studied
sequences. Taphonomic observations indicated that these shells were
affected by encrustation, bioerosion, disarticulation, fragmentation and
abrasion. Moreover, valves of this species suffered minor chipping along
their fragile margins. The occurrence of the studied species associated
with oysters and other benthic faunal assemblages within carbonate
sediments revealed shallow, low energy, warm and intertidal environments
with periods of relatively agitated conditions.
... This paper deals with bathyal living glass-and micro-scallops (Pectinoidea: Propeamussiidae and Cyclochlamydidae) sampled by French deep-sea campaigns and expeditions to the Mozambique Channel (Benthedi 1977, Mainbaza 2009), north western Madagascar (Crevettière 1975, Miriky 2009), southern Madagascar (Atimo Vatae 2010) and Inhaca Island, Mozambique (Inhaca 2011). In addition benthic pectinoid material from off KwaZulu-Natal and Transkei, South Africa, mainly sampled by the Natal Museum Dredging Programme (NMDP) (Dijkstra & Kilburn 2001), is also recorded herein. ...
... Distribution and habitat: Propeamussium andamanicum is recorded from the Andaman Sea, Laccadive Sea and Arabian Sea (Smith 1895(Smith , 1904, Gulf of Aden and Zanzibar area (Knudsen 1967), New Caledonia (Dijkstra 1995), Vanuatu, Wallis and Futuna (Dijkstra 2001), Fiji (Dijkstra & Maestrati 2008). Now also from northwestern Madagascar and the Mozambique Channel (new record). ...
... No byssal notch, ctenolium lacking, lateral gape present. Distribution and habitat: Propeamussium caducum has a large distribution throughout the Indo-West Pacific from southern Japan (Okutani 2000), southwards to the East China Sea and South China Sea (Xu & Zhang 2008), the Philippine Archipelago (Knudsen 1967;Dijkstra 2013), the Indonesian Archipelago (Dijkstra & Kastoro 1997), and eastwards to the Solomon Islands (Dijkstra & Maestrati 2008), the Vanuatu Archipelago and New Caledonia (Dijkstra 1995(Dijkstra , 2001Dijkstra & Maestrati 2012), westwards to the Bay of Bengal, the Arabian Sea and Gulf of Aden, and southwards to Zanzibar area (Dijkstra 1995;Dijkstra & Janssen 2013). Now also extended more southwards to the northwestern area of Madagascar (new record). ...
Twenty-five species of Pectinoidea are herein listed from the Mozambique Channel, northwestern and southern Madagascar, and northeastern South Africa. New species: Propeamussium rosadoi, Parvamussium catillus, Parvamussium kilburni, Parvamussium puillandrei, Parvamussium strongae, Cyclopecten cassiculus, Cyclopecten kantori, Cyclochlamys bacachorda.
... This paper deals with bathyal living glass-and micro-scallops (Pectinoidea: Propeamussiidae and Cyclochlamydidae) sampled by French deep-sea campaigns and expeditions to the Mozambique Channel (Benthedi 1977, Mainbaza 2009), north western Madagascar (Crevettière 1975, Miriky 2009), southern Madagascar (Atimo Vatae 2010) and Inhaca Island, Mozambique (Inhaca 2011). In addition benthic pectinoid material from off KwaZulu-Natal and Transkei, South Africa, mainly sampled by the Natal Museum Dredging Programme (NMDP) (Dijkstra & Kilburn 2001), is also recorded herein. ...
... Distribution and habitat: Propeamussium andamanicum is recorded from the Andaman Sea, Laccadive Sea and Arabian Sea (Smith 1895(Smith , 1904, Gulf of Aden and Zanzibar area (Knudsen 1967), New Caledonia (Dijkstra 1995), Vanuatu, Wallis and Futuna (Dijkstra 2001), Fiji (Dijkstra & Maestrati 2008). Now also from northwestern Madagascar and the Mozambique Channel (new record). ...
... No byssal notch, ctenolium lacking, lateral gape present. Distribution and habitat: Propeamussium caducum has a large distribution throughout the Indo-West Pacific from southern Japan (Okutani 2000), southwards to the East China Sea and South China Sea (Xu & Zhang 2008), the Philippine Archipelago (Knudsen 1967;Dijkstra 2013), the Indonesian Archipelago (Dijkstra & Kastoro 1997), and eastwards to the Solomon Islands (Dijkstra & Maestrati 2008), the Vanuatu Archipelago and New Caledonia (Dijkstra 1995(Dijkstra , 2001Dijkstra & Maestrati 2012), westwards to the Bay of Bengal, the Arabian Sea and Gulf of Aden, and southwards to Zanzibar area (Dijkstra 1995;Dijkstra & Janssen 2013). Now also extended more southwards to the northwestern area of Madagascar (new record). ...
Twenty-five species of Pectinoidea (24 Propeamussiidae, 1 Cyclochlamydidae) are herein listed from the Mozambique Channel, northwestern and southern Madagascar, and northeastern South Africa. New species: Propeamussium rosadoi, Parvamussium catillus, Parvamussium kilburni, Parvamussium puillandrei, Parvamussium strongae, Cyclopecten cassiculus, Cyclopecten kantori, Cyclochlamys bacachorda. New synonym: Amussium sewelli Knudsen, 1967 = Propeamussium watsoni (E.A. Smith, 1885). New records for the Mozambique Channel and northwestern Madagascar: Propeamussium andamanicum, Propeamussium arabicum, Propeamussium caducum, Propeamussium jeffreysii, Propeamussium sibogai, Propeamussium watsoni, Parvamussium formosum, Parvamussium scitulum, Parvamussium torresi, Parvamussium vesiculatum, Cyclopecten kapalae, Similipecten eous. New records for southern Madagascar: Propeamussium jeffreysii, Propeamussium sibogai, Propeamussium watsoni, Parvamussium formosum, Parvamussium scitulum, Parvamussium thyrideum, Parvamussium vesiculatum, Parvamussium vidalense, Cyclopecten kapalae, Similipecten eous. New record for South Africa: Propeamussium jeffreysii, Parvamussium formosum, Parvamussium scitulum, Cyclopecten horridus, Similipecten eous.
... Among other well-studied molluscan families, there are only a few species with a western African or European to southern South African distribution, e.g. Talochlamys multistriata (Poli, 1795) among Pectinidae, which nevertheless shows a gap in Namibia (Dijkstra & Kilburn 2001). Furthermore, the pattern of southeastern Atlantic currents, with a northward-flowing Benguela Current and a southward-flowing Angola Current, which meet at around the Angolan-Namibian border, strongly suggests that western African and South African species are unrelated. ...
The South African species of Caecidae are revised on the basis of the material stored in the KwaZulu-Natal Museum (Pietermaritzburg, South Africa). Twenty species are recognized, 10 of which are described as new: Caecum austrafricanum, C. incisum, C. intortum, C. knysnaense, C. leilae, C. lindae, C. maraisi, C. morgan, Parastrophia avaricosa and P. ornata. The lectotype of Caecum subquadratum Carpenter, 1859 is herein selected.
... The scallop Pecten sulcicostatus G.B. Sowerby 1842 is one of 29 species of Pectinidae recorded off the southern African coast (Dijkstra and Kilburn 2001). The species is endemic to the inner continental shelf of South Africa, occurring on sand or muddy sand with a relatively limited distribution extending from False Bay to East London. ...
... Both valves are sculptured with 12-15 radial costae and their colour is off-white with pink, salmon or brown markings (Figure 1a). Although Dijkstra and Kilburn (2001) treated P. sulcicostatus as a species, morpho logical similarity to Pecten maximus is acknowledged and both Fleming (1957) and Kilburn and Rippey (1982) treated P. sulcicostatus as a subspecies of P. maximus. ...
Grow-out studies of the scallop Pecten sulcicostatus, endemic to the South African coast, contribute to an investigation of the suitability of this species for commercial culture. Hatchery-reared juvenile scallops were placed in a suspended culture system at 5 m depth in Saldanha Bay on the west coast of South Africa. Scallops of 78 days old and ranging in size from 4.5 mm to 11.0 mm shell height (mean 6.9 mm), as measured on 2 February 2010, were deployed in Saldanha Bay on 9 February 2010. Subsequent growth was assessed monthly through increments in shell height in relation to changing environmental conditions as determined through continuous measures of temperature and chlorophyll a. Upon termination of the experiment on 15 February 2011, scallops ranged in size from 42.1 mm to 48.7 mm (mean 45.1 mm), representing an increment in shell height of 38.2 mm over one year. The mean growth rate of 0.10 mm day (mean specific growth rate of 0.0046 day) compares favourably with other commercially cultured species and exceeds previous estimates of growth of naturally occurring populations of P. sulcicostatus. Scallop growth was poorly correlated with either temperature or chlorophyll a concentration, but scallop mortality was closely aligned to the temperature regime of Saldanha Bay, exhibiting high mortalities during mid-summer.
