DOCSLIB.ORG

Terrestrial Gastropoda from the Pleistocene of Beni Saf, NW Algeria

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Terrestrial Gastropoda from the Pleistocene of Beni Saf, NW Algeria Annales de Paléontologie 104 (2018) 291–300 Disponible en ligne sur ScienceDirect www.sciencedirect.com Original article Terrestrial Gastropoda from the Pleistocene of Beni Saf, NW Algeria Gastropodes terrestres du Pléistocène de Beni Saf, Nord Ouest de l’Algérie a,∗ b c Rodrigo B. Salvador , Mohammed Adaci , Madani Benyoucef a Museum of New Zealand Te Papa Tongarewa, Wellington, New Zealand b Earth and Universe Sciences, Research Laboratory no. 25, Abou-Bekr Belkaid University, Tlemcen, Algeria c Faculty of Natural and Life Sciences, Mustapha Stambouli-Mascara University, Mascara, Algeria a r t i c l e i n f o a b s t r a c t Article history: A study of the terrestrial gastropods of the Pliocene-Quaternary succession of the Beni Saf sea cliff, NW Received 2 May 2018 Algeria, at the Playa Port locality, is presented herein. The sedimentary succession is subdivided into four Accepted 31 July 2018 lithostratigraphic units, on the basis of their lithologic and biogenic contents: the three first units (A, B and Available online 22 November 2018 C) are of marine origin; the last unit (D) is of continental origin and includes three beds yielding terrestrial gastropod fossils, which form laterally traceable horizons. Herein, we describe the section’s lithology, Keywords: present stratigraphical considerations regarding its age and thoroughly described its terrestrial gastropod Caenogastropoda fossil fauna. In total, 13 species are reported here from Beni Saf: 2 caenogastropods (family Pomatiidae) Pliocene-Quaternary and 11 stylommatophorans (family Achatinidae and superfamily Helicoidea). The sedimentological data Stylommatophora indicate that the depositional setting at Beni Saf was a dune system flanked by wadi floodplains deposits Tafna Basin Villafranchian (snail levels); the ecological preferences of the gastropods largely agrees with this scenario. © 2018 Elsevier Masson SAS. All rights reserved. r é s u m é Mots clés : Le présent travail montre l’étude des gastéropodes terrestres de l’affleurement plio-quaternaire du Port Caenogastropoda Playa situé sur la falaise maritime de Beni Saf, NW Algérie. La série sédimentaire est subdivisée en quatre Stylommatophora unités lithostratigraphiques informelles, dont chacune est dotée de ses propres caractères lithologiques Plio-Quaternaire et paléontologiques. Les trois premières unités (A, B et C) sont d’origine marine ; la dernière unité (D) Bassin de la Tafna est d’origine continentale, formée de trois bancs, en bonne continuité latérale, à fossiles de gastéropodes Villafranchien terrestres. Ici, nous présentons la lithologie, l’attribution stratigraphique et la description minutieuse des gastéropodes terrestres de chaque banc. Au total, 13 espèces sont signalées à Beni Saf : 2 céno- gastéropodes (famille des Pomatiidae) et 11 stylommatophores (superfamille des Helicoidea et famille des Achatinidae). Les données sédimentologiques indiquent que le milieu de dépôt, à Beni Saf, était un système de dunes encadré par des dépôts de plaine d’inondation alluviale (niveaux à escargots). Les préférences écologiques des gastéropodes s’accordent largement avec ce scénario. © 2018 Elsevier Masson SAS. Tous droits reserv´ es.´ 1. Introduction 1999; Höltke et al., submitted) and may also act as paleoenviron- mental proxies (e.g., Goodfriend, 1992; Moine et al., 2002), studying Cenozoic fossil outcrops are widely distributed and well this fossil fauna can prove worthwhile. exposed at several localities in Algeria. They have been known for The fossil outcrops in the region of Beni Saf in northwest- a long time (e.g., Crosse, 1861, 1862; Bourguignat, 1862), but most ern Algeria are one of such understudied occurrences, as only a remain understudied to this day, especially regarding their gastro- short report on its terrestrial gastropods (Pallary, 1901: 96–97) pod fauna. Since gastropods may be useful index fossils (e.g., Esu, and an unpublished geological study (Guardia, 1975) exist. Pallary (1901) briefly mentioned four distinct sedimentary beds bearing gastropods, assigning them to the Quaternary. He listed 10 gastro- ∗ pod species, including “Helix” spp. and Rumina decollata (Linnaeus, Corresponding author. E-mail address: [email protected] (R.B. Salvador). 1758). Guardia (1975) offered a more in-depth analysis of the https://doi.org/10.1016/j.annpal.2018.07.002 0753-3969/© 2018 Elsevier Masson SAS. All rights reserved. 292 R.B. Salvador et al. / Annales de Paléontologie 104 (2018) 291–300 Fig. 1. Location map showing the position of the study area. Carte de localisation montrant la position de la zone d’étude. geodynamics of the northwestern Orania region, only briefly men- diameter) in a brownish sandstone matrix, showing an erosional tioning the presence of terrestrial gastropods (“Hélix”). base. It is overlain by brownish, moderately- to poorly-sorted, New excavations were conducted in the fossil outcrop of Beni Saf medium-grained sandstone rich in bivalve fragments. The upper (Fig. 1) during two field expeditions (2016–2017), bringing to light portion of this unit is interbedded with thin micro-conglomerate a fauna of terrestrial gastropods. Here we describe the lithology channels alternating with sandstone levels rich in echinoid fossils and stratigraphy of this fossil outcrop, focusing especially on the (Clypeaster spp.). • gastropod-bearing levels, and propose a Pleistocene age for them. Unit B (∼5 m): This unit begins with a thin channeled conglom- Furthermore, we present an inventory of the fossil land snail fauna erate bed (10–30 cm), being mainly composed of angular clasts of Beni Saf, alongside a brief paleoenvironmental interpretation. (usually centimetric in diameter and variable in lithology and age: Paleozoic schist and quartzite, Messinian reef limestone) embed- ded in a brownish sandstone matrix. The conglomerate lithofacies 2. Geological setting grades upwards into a 4 meter thick section of yellowish fine- to coarse-grained bioclastic sandstones, showing horizontal and 2.1. General overview of study area low-angle cross-stratification on its uppermost portion. • Unit C (∼32 m): This unit is well developed along the mar- The study area is part of the Tafna Basin, which was defined itime coastline of Beni Saf. It is composed mainly of yellowish during the period when the early Miocene sea occupied the whole fine-gained sandstone in the form of tabular beds. These beds, western Orania region. Its paleogeographic history reveals sev- higher on, show erosional bases (sometimes very sharp) and eral distinct cycles during the Neogene and Quaternary dominated a wide variety of sedimentary structures, such as: wave-ripple by transgressive-regressive events (Gentil, 1903; Dalloni, 1915; cross-stratification, hummocky cross-stratification, mud-drape, Perrodon, 1957). The Tafna Basin encompasses the hills and plains and planar and herringbone cross-stratification. They are overlain crossed by Oued Tafna (Tafna River) and its tributaries. It is delim- by a centimeter-thick conglomerate bed consisting of rounded ited by the Tlemcen range to the south, the Trara mountain range clasts embedded in a fine sandstone matrix. and the Mediterranean Sea to the north, and to the east by the Sebaa • Unit D (∼35 m): This unit is the subject of the present study. It Chioukh Mountains and the westernmost extension of the Tessala is composed of three distinct subunits: D1: this basal subunit range (Fig. 1). consists mostly of soft hematite-rich sandstone (red bed), con- We studied the outcropping sections of the Playa Port on the taining root structures (pedotubules), and paleosol. Terrestrial right bank of the Oued Sidi Boucif. It is morphologically shaped as snails are commonly found in one level of the D1 subunit, which a cliff (Fig. 2A), circa 100 m high, on the north coast of Beni Saf ◦ ◦ is here addressed as “Gastropod Level 1”. D2: the second subunit (coordinates 35 18 29 N 01 22 42 W). shows a sharp lower contact with subunit D1. It is 2.5 meter thick, mainly composed of yellowish mega-rippled fine-grained sand- 2.2. Description of the section stones. No gastropods were found in this subunit. D3: the third subunit consists mostly of a grey massive stratum, showing a very The Pliocene-Quaternary outcrops along the Beni Saf sea cliff homogeneous appearance with irregular stratification surfaces. It were deposited over an angular unconformity with the Paleozoic contains gastropod fossils (molds) at the base (Gastropod Level basement. They consist of siliciclastic rocks that can be divided 2) and towards the top of the Unit (Gastropod Level 3). Unit D is into four informal units (Figs. 2B, C) based on lithology and fossil overlain by a thin irregular calcrete bed. content. From bottom to top, the units are: • This profile is distinct from the four layers described by Pallary Unit A (∼24 m): The exposed sections of this unit consist of a thin (1901), but the base of the present Unit D correlates to the “Helix”- basal conglomerate, containing reworked dark Paleozoic peb- bearing layer of Guardia (1975: “sables fins rubéfiés à Hélix”). bles (schist, quartzite, sandstone and limestone; of 3–10 cm in R.B. Salvador et al. / Annales de Paléontologie 104 (2018) 291–300 293 Fig. 2. A. Panoramic view of the Beni Saf maritime cliff. B. Lithostratigraphic log of the Plio-Quaternary Playa Port outcrop. C. Closer view of Unit D showing the positions of the three gastropod-bearing levels. A. Vue panoramique de la falaise maritime de Beni Saf. B. Colonne lithostratigraphique de l’affleurement plio-quaternaire du Port Playa. C. Vue rapprochée montrant la position des trois niveaux à gastéropodes. 2.3. Stratigraphy and age Unit D is overlain by basaltic flows. The volcanic activity of the Tafna area generated several volcanic flows, with ages ranging from Both the marine (Units A to C) and continental deposits (Unit Pliocene to Quaternary (Megartsi, 1985). The flow overlying Unit D) of the sea cliffs overhanging Beni Saf have always been prob- D in Beni Saf was assigned to the upper part of the Lower Pleis- lematic from a stratigraphic standpoint due to the scarcity of index tocene (Guardia, 1975); the age of the most recent flows is 1.45 Ma fossils.
Load more

Recommended publications
  • Gastropods Alien to South Africa Cause Severe Environmental Harm in Their Global Alien Ranges Across Habitats
    Received: 18 December 2017 | Revised: 4 May 2018 | Accepted: 27 June 2018 DOI: 10.1002/ece3.4385 ORIGINAL RESEARCH Gastropods alien to South Africa cause severe environmental harm in their global alien ranges across habitats David Kesner1 | Sabrina Kumschick1,2 1Department of Botany & Zoology, Centre for Invasion Biology, Stellenbosch University, Abstract Matieland, South Africa Alien gastropods have caused extensive harm to biodiversity and socioeconomic sys- 2 Invasive Species Programme, South African tems like agriculture and horticulture worldwide. For conservation and management National Biodiversity Institute, Kirstenbosch National Botanical Gardens, Claremont, purposes, information on impacts needs to be easily interpretable and comparable, South Africa and the factors that determine impacts understood. This study aimed to assess gas- Correspondence tropods alien to South Africa to compare impact severity between species and under- Sabrina Kumschick, Centre for Invasion stand how they vary between habitats and mechanisms. Furthermore, we explore the Biology, Department of Botany & Zoology, Stellenbosch University, Matieland, relationship between environmental and socioeconomic impacts, and both impact South Africa. measures with life- history traits. We used the Environmental Impact Classification for Email: [email protected] Alien Taxa (EICAT) and Socio- Economic Impact Classification for Alien Taxa (SEICAT) Funding information to assess impacts of 34 gastropods alien to South Africa including evidence of impact South African National Department of Environmental Affairs; National Research from their entire alien range. We tested for correlations between environmental and Foundation; DST-NRF Centre of Excellence socioeconomic impacts per species, and with fecundity and native latitude range for Invasion Biology; South African National Biodiversity Institute using Kendall’s tau tests.
    [Show full text]
  • Miocene Continental Gastropods from the Southern Margin of the Swabian Alb (Baden-Württemberg, SW Germany)
    N. Jb. Geol. Paläont. Abh. 287/1 (2018), 17–44 Article E Stuttgart, January 2018 Miocene continental gastropods from the southern margin of the Swabian Alb (Baden-Württemberg, SW Germany) Olaf Höltke, Rodrigo B. Salvador, and Michael W. Rasser With 6 figures Abstract: The Middle Miocene silvana-beds outcropping at the southern margin of the Swabian Alb bear a wide array of terrestrial and freshwater gastropods. Especially in the surroundings of the Emerberg and Tautschbuch hills, there are records of several collection sites. In the present work, we investigated material from the historical localities from these two regions, housed in museum collec- tions, in order to provide an updated check list, synthesizing the knowledge of the region in the hopes to spur renewed interest. In total, we report 14 freshwater and 50 land snail species from the area, but not all species reported in the literature could be confirmed. Key words: Baden-Württemberg, European Land Mammal Zone MN 5, Langhian, silvana- beds, Upper Freshwater Molasse. 1. Introduction (1923-1930). Therefore, in the absence of more driven excavations for the moment, here we investigated ma- The southern margin of the Swabian Alb, especially terial from several historical localities from these two the Emerberg and Tautschbuch hills, bears a consider- regions, housed in museum collections. Our goal is to able number of continental Miocene deposits (Fig. 1). provide an updated check list of species and localities, These are built up by the silvana-beds, a lithostrati- thus synthesizing the knowledge of the region in the graphic unit of the Miocene Upper Freshwater Molasse hopes to spur renewed interest and collection efforts.
    [Show full text]
  • Mollusca) from Malta
    The Central Mediterranean Naturalist 4 (1): 35 - 40 Malta: December 2003 ON SOME ALIEN TERRESTRIAL AND FRESHWATER GASTROPODS (MOLLUSCA) FROM MALTA Constantine Mifsud!, Paul Sammut2 and Charles Cachia3 ABSTRACT Nine species of gastropod molluscs: Otala lactea (0. F. MUller, 1774); Cemuella virgata (da Costa, 1778); Cochlicella barbara (Linnaeus, 1758); Oxychilus helveticus (Blum, 1881); Succinea putris (Linnaeus, 1758); Oxyloma elegans (Risso, 1826); Helisoma duryi Wetherby, 1879; Planorbarius comeus (Linnaeus, 1758); and the limacid slug Lehmannia valentiana (A. Ferussac, 1822) are recorded for the first time as alien species from local plant nurseries. For each species a short description and notes on distribution and ecology are given. INTRODUCTION The land and fresh water Mollusca of the Maltese Islands have been recently well treated by Giusti et al. (1995). However, during the last twelve years many non-indigenous plants, shrubs and trees, both decorative species and fruit trees, have been imported from Europe either to embellish local gardens or roadsides or for agricultural purposes. It occurred to the authors that there is the possibility that alien species of molluscs might have been introduced accidentally with these imported plants. This is not a completely new phenomenon. For example, Pomatias elegans and Discus rotundatus occur at San Anton Gardens were they were probably alien introductions due to human activities (Thake, 1973). During recent research to assess the status of some of the endemic molluscs of the Maltese Islands, with special emphasis on the Limacidae, areas where imported plants are stocked were searched for any alien species. This resulted in the discovery of several alien species of terrestrial and freshwater snails, a few of them alive.
    [Show full text]
  • First Record of Eobania Vermiculata (O. F. Müller, 1774) (Gastropoda: Eupulmonata: Helicidae) in Romania
    Folia Malacol. 29(1): 51–53 https://doi.org/10.12657/folmal.029.003 SHORT COMMUNICATION FIRST RECORD OF EOBANIA VERMICULATA (O. F. MÜLLER, 1774) (GASTROPODA: EUPULMONATA: HELICIDAE) IN ROMANIA STELIAN GRIGORE Museum of Human Evolution and Technology in Paleolithic, Princely Court National Museum Targoviste, Romania (e-mail: [email protected]); https://orcid.org/0000-0002-9384-3634 ABSTRACT: Eobania vermiculata (O. F. Müller) is recorded for the first time in Romania. Other Mediterranean and Balkan species have entered the south of Romania – Dobrogea, or will do so in the near future. We expect the rest of Romania to be invaded, because the Danube is not an insurmountable barrier for some of these species. KEY WORDS: Eobania vermiculata; alien species; land snail; anthropochory A northward expansion of some terrestrial gas- tions for the invasion of Balkan and Mediterranean tropod species has been observed for the last two species. The climate and calcareous substrate of the decades; the spread has been accelerated by the coastal area in south-eastern Dobrogea favour accli- intensification of trade, tourism development and matisation of the new arrivals. cross-border freight transport. Among the regions of As early as four decades ago, Alexandru V. Grossu Romania, Dobrogea has the most favourable condi- anticipated the occurrence of this phenomenon in the Fig. 1. Map of Romania with the locality in Costinești 52 Stelian Grigore Fig. 2. Mature individuals of Eobania vermiculata in Costinești Fig. 3. The largest shell of Eobania vermiculata from Costinești near future (GROSSU 1983). In the last two decades, of perennials (Cichorium intybus, Convolvulus arvensis, there has been an expansion of the Mediterranean Echium vulgare, Elymus repens, Crupina vulgaris, Phleum species both in the east and in the northwest of their pratense, Malva pusilla, Teucrium polium, Juncus mariti­ original range (MIENIS 2002, UESHIMA et al.
    [Show full text]
  • Upper Eocene) of the Sultanate of Oman
    Pala¨ontol Z (2016) 90:63–99 DOI 10.1007/s12542-015-0277-1 RESEARCH PAPER Terrestrial and lacustrine gastropods from the Priabonian (upper Eocene) of the Sultanate of Oman 1 1 2 3 Mathias Harzhauser • Thomas A. Neubauer • Dietrich Kadolsky • Martin Pickford • Hartmut Nordsieck4 Received: 17 January 2015 / Accepted: 15 September 2015 / Published online: 29 October 2015 Ó The Author(s) 2015. This article is published with open access at Springerlink.com Abstract Terrestrial and aquatic gastropods from the sparse non-marine fossil record of the Eocene in the Tethys upper Eocene (Priabonian) Zalumah Formation in the region. The occurrence of the genera Lanistes, Pila, and Salalah region of the Sultanate of Oman are described. The Gulella along with some pomatiids, probably related to assemblages reflect the composition of the continental extant genera, suggests that the modern African–Arabian mollusc fauna of the Palaeogene of Arabia, which, at that continental faunas can be partly traced back to Eocene time, formed parts of the southeastern Tethys coast. Sev- times and reflect very old autochthonous developments. In eral similarities with European faunas are observed at the contrast, the diverse Vidaliellidae went extinct, and the family level, but are rarer at the genus level. These simi- morphologically comparable Neogene Achatinidae may larities point to an Eocene (Priabonian) rather than to a have occupied the equivalent niches in extant environ- Rupelian age, although the latter correlation cannot be ments. Carnevalea Harzhauser and Neubauer nov. gen., entirely excluded. At the species level, the Omani assem- Arabiella Kadolsky, Harzhauser and Neubauer nov. gen., blages lack any relations to coeval faunas.
    [Show full text]
  • Malacological Diversity on Four Lamiaceae in the Region of Tlemcen
    Journal of Plant Sciences and Crop Protection Volume 1 | Issue 1 Review Article Open Access Malacological diversity on four Lamiaceae in the region of Tlemcen (Northwest of Algeria) Damerdji A* Department of Ecology and Environment, Faculty of SNV-STU, University of Tlemcen, Algeria *Corresponding author: Damerdji A, Department of Ecology and Environment, Faculty of SNV-STU, University of Tlemcen, 13000, Algeria, E-mail: [email protected] Citation: Damerdji A (2018) Malacological diversity on four Lamiaceae in the region of Tlemcen (North- west of Algeria). J Plant Sci Crop Protec 1(1): 106. doi: 10.15744/2639-3336.1.106 Received Date: March 07, 2018 Accepted Date: July 25, 2018 Published Date: July 27, 2018 Abstract The region of Tlemcen is located in the north-west Algeria. Tends arid climate leads to a degradation of vegetation in open formation, where are found the doum the diss and broom.... Other aromatic species are considered: rosemary, thyme, lavender and horehound. By their morphological and botanical four aromatic species belonging to the Labiatae family. We propose an approach to achieve diversity malacofauna identified on these Lamiaceae. These latters are certainly a nutritional source for this malacological fauna. For this, an inventory is made in different stations. Malacological wealth of thyme is estimated at 19, that the rosemary to 18, on 14 and lavender to last, that the horehound 7. It includes four families namely Milacidae the Sphincterochilidae the Helicidae and Subulinidae. Milacidae are present only in horehound and lavender stations. On the other hand, the Sphincterochilidae, namely Sphincterochila candidissima, is absent on horehound and lavander.
    [Show full text]
  • Fauna of New Zealand Ko Te Aitanga Pepeke O Aotearoa
    aua o ew eaa Ko te Aiaga eeke o Aoeaoa IEEAE SYSEMAICS AISOY GOU EESEAIES O ACAE ESEAC ema acae eseac ico Agicuue & Sciece Cee P O o 9 ico ew eaa K Cosy a M-C aiièe acae eseac Mou Ae eseac Cee iae ag 917 Aucka ew eaa EESEAIE O UIESIIES M Emeso eame o Eomoogy & Aima Ecoogy PO o ico Uiesiy ew eaa EESEAIE O MUSEUMS M ama aua Eiome eame Museum o ew eaa e aa ogaewa O o 7 Weigo ew eaa EESEAIE O OESEAS ISIUIOS awece CSIO iisio o Eomoogy GO o 17 Caea Ciy AC 1 Ausaia SEIES EIO AUA O EW EAA M C ua (ecease ue 199 acae eseac Mou Ae eseac Cee iae ag 917 Aucka ew eaa Fauna of New Zealand Ko te Aitanga Pepeke o Aotearoa Number / Nama 38 Naturalised terrestrial Stylommatophora (Mousca Gasooa Gay M ake acae eseac iae ag 317 amio ew eaa 4 Maaaki Whenua Ρ Ε S S ico Caeuy ew eaa 1999 Coyig © acae eseac ew eaa 1999 o a o is wok coee y coyig may e eouce o coie i ay om o y ay meas (gaic eecoic o mecaica icuig oocoyig ecoig aig iomaio eiea sysems o oewise wiou e wie emissio o e uise Caaoguig i uicaio AKE G Μ (Gay Micae 195— auase eesia Syommaooa (Mousca Gasooa / G Μ ake — ico Caeuy Maaaki Weua ess 1999 (aua o ew eaa ISS 111-533 ; o 3 IS -7-93-5 I ie 11 Seies UC 593(931 eae o uIicaio y e seies eio (a comee y eo Cosy usig comue-ase e ocessig ayou scaig a iig a acae eseac M Ae eseac Cee iae ag 917 Aucka ew eaa Māoi summay e y aco uaau Cosuas Weigo uise y Maaaki Weua ess acae eseac O o ico Caeuy Wesie //wwwmwessco/ ie y G i Weigo o coe eoceas eicuaum (ue a eigo oaa (owe (IIusao G M ake oucio o e coou Iaes was ue y e ew eaIa oey oa ue oeies eseac
    [Show full text]
  • (Approx) Mixed Micro Shells (22G Bags) Philippines € 10,00 £8,64 $11,69 Each 22G Bag Provides Hours of Fun; Some Interesting Foraminifera Also Included
    Special Price £ US$ Family Genus, species Country Quality Size Remarks w/o Photo Date added Category characteristic (€) (approx) (approx) Mixed micro shells (22g bags) Philippines € 10,00 £8,64 $11,69 Each 22g bag provides hours of fun; some interesting Foraminifera also included. 17/06/21 Mixed micro shells Ischnochitonidae Callistochiton pulchrior Panama F+++ 89mm € 1,80 £1,55 $2,10 21/12/16 Polyplacophora Ischnochitonidae Chaetopleura lurida Panama F+++ 2022mm € 3,00 £2,59 $3,51 Hairy girdles, beautifully preserved. Web 24/12/16 Polyplacophora Ischnochitonidae Ischnochiton textilis South Africa F+++ 30mm+ € 4,00 £3,45 $4,68 30/04/21 Polyplacophora Ischnochitonidae Ischnochiton textilis South Africa F+++ 27.9mm € 2,80 £2,42 $3,27 30/04/21 Polyplacophora Ischnochitonidae Stenoplax limaciformis Panama F+++ 16mm+ € 6,50 £5,61 $7,60 Uncommon. 24/12/16 Polyplacophora Chitonidae Acanthopleura gemmata Philippines F+++ 25mm+ € 2,50 £2,16 $2,92 Hairy margins, beautifully preserved. 04/08/17 Polyplacophora Chitonidae Acanthopleura gemmata Australia F+++ 25mm+ € 2,60 £2,25 $3,04 02/06/18 Polyplacophora Chitonidae Acanthopleura granulata Panama F+++ 41mm+ € 4,00 £3,45 $4,68 West Indian 'fuzzy' chiton. Web 24/12/16 Polyplacophora Chitonidae Acanthopleura granulata Panama F+++ 32mm+ € 3,00 £2,59 $3,51 West Indian 'fuzzy' chiton. 24/12/16 Polyplacophora Chitonidae Chiton tuberculatus Panama F+++ 44mm+ € 5,00 £4,32 $5,85 Caribbean. 24/12/16 Polyplacophora Chitonidae Chiton tuberculatus Panama F++ 35mm € 2,50 £2,16 $2,92 Caribbean. 24/12/16 Polyplacophora Chitonidae Chiton tuberculatus Panama F+++ 29mm+ € 3,00 £2,59 $3,51 Caribbean.
    [Show full text]
  • Do Singapore's Seawalls Host Non-Native Marine Molluscs?
    Aquatic Invasions (2018) Volume 13, Issue 3: 365–378 DOI: https://doi.org/10.3391/ai.2018.13.3.05 Open Access © 2018 The Author(s). Journal compilation © 2018 REABIC Research Article Do Singapore’s seawalls host non-native marine molluscs? Wen Ting Tan1, Lynette H.L. Loke1, Darren C.J. Yeo2, Siong Kiat Tan3 and Peter A. Todd1,* 1Experimental Marine Ecology Laboratory, Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, #02-05, Singapore 117543 2Freshwater & Invasion Biology Laboratory, Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, #02-05, Singapore 117543 3Lee Kong Chian Natural History Museum, Faculty of Science, National University of Singapore, 2 Conservatory Drive, Singapore 117377 *Corresponding author E-mail: [email protected] Received: 9 March 2018 / Accepted: 8 August 2018 / Published online: 17 September 2018 Handling editor: Cynthia McKenzie Abstract Marine urbanization and the construction of artificial coastal structures such as seawalls have been implicated in the spread of non-native marine species for a variety of reasons, the most common being that seawalls provide unoccupied niches for alien colonisation. If urbanisation is accompanied by a concomitant increase in shipping then this may also be a factor, i.e. increased propagule pressure of non-native species due to translocation beyond their native range via the hulls of ships and/or in ballast water. Singapore is potentially highly vulnerable to invasion by non-native marine species as its coastline comprises over 60% seawall and it is one of the world’s busiest ports. The aim of this study is to investigate the native, non-native, and cryptogenic molluscs found on Singapore’s seawalls.
    [Show full text]
  • Of Murieidae(Gastropoda)
    The miLacologicalsocietymalacological society of Japan VENUS Jour. Malac,) flza (Jap. - VeL. S5, No. 4 "996): 273 280 l )/ F ･ ilgJtscSF?:etc7 pt kffi 1$}a) 2 ;blpt - V7 tz 07-- )V Deseription of Two New Species of Murieidae (Gastropoda) from the Indo-West Pacific Roland HouART (Research Associate, Institut Royal des Sciences Naturelles de Belgique Departement des Invert6bres Recents, Rue Vautier, 29, B-1000 Brussels, Belgium) Abstract: Aspella schroederi n. sp, from Guam Istand (Mariana Archipelago), and Orania descrlbed. rosea n.sp,, from the westetn Indian Ocean and from the Philippine Islands, are Bunsa lameUosa Dunker, 1863 is censidered as a junior synonym Qf Aspella producta (Pease, 1861). Introduction having been deseribed Seventeen species of Aspetta are currently known, eleven of thern since 1976. The shells are narrow, lanceolate and small,.with an average length of 10-15 mrn. They are covered by a whitish intritacalx. The intricate sculpture of this calcare- ous layer is particular to each species. A. schroederi n. sp. is compared to A. producta (Pease, 1861} from the Indo-West Pacific, and to A. thomassini Houart, 1985 from the western Indian Ocean. These species have a similar .nodose shell but differ in the intritacaix morphology. of which several Th ¢ genus Orania is included in the Ergalataxinae, a subfamily species were revised er named recently (Houart, 1995). Orania rosea n. sp. is eompared to O, pacij7ca (Nakayama, 1988) from the Indo-West Pacific. The material examined originates from private collections, and from various expeditions jointly conqucted by ORSTOM and Museum national'd'Histoire naturelle: "Vauban" - In the Philippines Island, collected aboard R.
    [Show full text]
  • CLECOM-Liste Österreich (Austria)
    CLECOM-Liste Österreich (Austria), mit Änderungen CLECOM-Liste Österreich (Austria) Phylum Mollusca C UVIER 1795 Classis Gastropoda C UVIER 1795 Subclassis Orthogastropoda P ONDER & L INDBERG 1995 Superordo Neritaemorphi K OKEN 1896 Ordo Neritopsina C OX & K NIGHT 1960 Superfamilia Neritoidea L AMARCK 1809 Familia Neritidae L AMARCK 1809 Subfamilia Neritinae L AMARCK 1809 Genus Theodoxus M ONTFORT 1810 Subgenus Theodoxus M ONTFORT 1810 Theodoxus ( Theodoxus ) fluviatilis fluviatilis (L INNAEUS 1758) Theodoxus ( Theodoxus ) transversalis (C. P FEIFFER 1828) Theodoxus ( Theodoxus ) danubialis danubialis (C. P FEIFFER 1828) Theodoxus ( Theodoxus ) danubialis stragulatus (C. P FEIFFER 1828) Theodoxus ( Theodoxus ) prevostianus (C. P FEIFFER 1828) Superordo Caenogastropoda C OX 1960 Ordo Architaenioglossa H ALLER 1890 Superfamilia Cyclophoroidea J. E. G RAY 1847 Familia Cochlostomatidae K OBELT 1902 Genus Cochlostoma J AN 1830 Subgenus Cochlostoma J AN 1830 Cochlostoma ( Cochlostoma ) septemspirale septemspirale (R AZOUMOWSKY 1789) Cochlostoma ( Cochlostoma ) septemspirale heydenianum (C LESSIN 1879) Cochlostoma ( Cochlostoma ) henricae henricae (S TROBEL 1851) - 1 / 36 - CLECOM-Liste Österreich (Austria), mit Änderungen Cochlostoma ( Cochlostoma ) henricae huettneri (A. J. W AGNER 1897) Subgenus Turritus W ESTERLUND 1883 Cochlostoma ( Turritus ) tergestinum (W ESTERLUND 1878) Cochlostoma ( Turritus ) waldemari (A. J. W AGNER 1897) Cochlostoma ( Turritus ) nanum (W ESTERLUND 1879) Cochlostoma ( Turritus ) anomphale B OECKEL 1939 Cochlostoma ( Turritus ) gracile stussineri (A. J. W AGNER 1897) Familia Aciculidae J. E. G RAY 1850 Genus Acicula W. H ARTMANN 1821 Acicula lineata lineata (DRAPARNAUD 1801) Acicula lineolata banki B OETERS , E. G ITTENBERGER & S UBAI 1993 Genus Platyla M OQUIN -TANDON 1856 Platyla polita polita (W. H ARTMANN 1840) Platyla gracilis (C LESSIN 1877) Genus Renea G.
    [Show full text]
  • Achatina Fulica Background
    Giant African Land Snail, Achatina fulica Background • Originally from coastal East Africa and its islands • Has spread to other parts of Africa, Asia, some Pacific islands, Australia, New Zealand, South America, the Caribbean, and the United States • Can be found in agricultural areas, natural forests, planted forests, riparian zones, wetlands, disturbed areas, and even urban areas in warm tropical climates with high humidity • Also known scientifically as Lissachatina fulica • Common names include giant African land snail and giant African snail Hosts Image citation: Cotton - Charles T. Bryson, USDA Agricultural Research Service, www.bugwood.org, #1116132 Banana - Charles T. Bryson, USDA Agricultural Research Service, www.bugwood.org, #1197011 Papaya - Forest & Kim Starr, Starr Environmental, www.bugwood.org, #5420178 Pumpkin - Howard F. Schwartz, Colorado State University, www.bugwood.org, #5365883 Cucumber - Howard F. Schwartz, Colorado State University, www.bugwood.org., #5363704 Carrots - M.E. Bartolo, www.bugwood.org, #5359190 Environmental Impacts • Consumes large quantities and numbers of species of native plants – May cause indirect damage to plants due to the sheer numbers of snails being so heavy that the plants beak under their weight – May also be a vector of several plant pathogens • Outcompetes and may even eat native snails • It eats so much it can alter the nutrient cycling • Their shells can neutralize acid soils and therefore damage plants that prefer acidic soils • Indirectly, the biocontrol and chemical control that is used on this species can affect native snail species as well. Structural Concerns and Nuisance Issues Image citation: Florida Department of Agriculture and Consumer Services, Division of Plant Industry Public Health Concerns • Intermediate host that vectors: – rat lungworm, Angiostrongylus cantonensis (roundworm) – A.
    [Show full text]