ANALISIS KELIMPAHAN DAN KEANEKARAGAMAN MOLLUSCA DI PADANG LAMUN PANTAI SINDANGKERTA KECAMATAN CIPATUJAH KABUPATEN TASIKMALAYA

Penelitian mengenai “Anslisis Kelimpahan dan Keanekaragaman Mollusca di Padang Lamun Pantai Sindangkerta Kecamatan Cipatujah Kabupaten Tasikmalaya” telah dilakukan pada bulan Mei 2017. Penelitian ini bertujuan untuk mendapatkan informasi secara kuantitatif mengenai kelimpahan dan keanekaragaman populasi Mollusca di padang lamun. Metode penilitian yang digunakan adalah metode deskriptif dengan desain penelitian belt transect dan teknik pengambilan sampel hand sorting. Pengambilan sampel dilakukan pada zona litoral denga padang lamun di 6 stasiun dengan 6 plot kuadrat tiap stasiun. Luas plot kuadrat yang dipakai berukuran 1m x 1m. Data yang diambil adalah data Mollusca di padang lamun dan data pendukung lingkungan (suhu, pH, oksigen terlarut, dan salinitas). Analisis data meliputi kelimpahan dan keanekaragaman Mollusca di padang lamun. Determinasi Mollusca dilakukan di Laboratorium Biologi FKIP UNPAS. Hasil determinasi Mollusca yang diperoleh sebanyak 647 individu yang terdiri dari 9 ordo, 21 famili, dan 47 spesies. Hasil penelitian menunjukan bahwa populasi Mollusca di padang lamun di Pantai Sindangkerta berkisaran antara 23 ind/m 2 –59 ind/m 2 . Analisis kelimpahan secara umum menunjukan tingkat kelimpahan yang cukup tinggi. Analisis indeks keanekaragaman Mollusca secara keseluruhan dari semua stasiun sebesar 1,90 yang menunjukan bahwa keanekaragaman Mollusca di padang lamun Pantai Sindangkerta Kecamatan Cipatujah Kabupaten Tasikmalaya secara umum tergolong dalam kategori sedang. Kata Kunci : Pantai Sindangkerta, Kelimpahan, Keanekaragaman, Mollusca, Padang Lamu

Disseminated eruptive giant mollusca contagiosa in an adult psoriasis patient during efalizumab therapy

Molluscum contagiosum is a common viral skin infection in children with atopic diathesis and not rare in HIV patients. We report a 45-year-old psoriasis patient who developed eruptive mollusca contagiosa during an antipsoriatic treatment with efalizumab. Copyright (C) 2008 S. Karger AG, Basel

Mollusk freaks: New teratological cases on marine mollusks from the south pacific ocean

Indexación: Scopus.The present study provides new documented cases of abnormalities on chitons (hypomerism and coalescence of shell plates), in addition to four new cases on keyhole limpets (closed apical opening), and one new teratologic case on internal organs in octopuses (missing gill). We assess the frequency of these abnormalities and discuss about its possible environmental, mechanic and genetic causes. Several of these findings represent the first of these cases reported in South Pacific Ocean. © 2018, Escuela de Ciencias del Mar. All rights reserved.http://lajar.ucv.cl/index.php/rlajar/article/view/vol46-issue4-fulltext-

The macrozoobenthic community of the Santa Gilla lagoon (southern Sardinia, Italy)

1 - Macrozoobenthos is one of the most significant communities of hydrobionts for assessing the ecological state of a water body. In spite of its importance, only few data concerning the macrobenthic community of Santa Gilla lagoon are available; 2 - Santa Gilla is one of the most important wetlands in Sardinia. The aim of this study is to give data on species composition of its macrozoobenthic community; 3 - Sampling has been carried out in 2010-2011 in July, October, January and April, in three stations located along a salinity gradient and the main environmental parameters were measured; 4 - A total of 13031 specimens belonging to 92 taxonomic groups and 5 main phyla (Anellida, Mollusca, Arthropoda, Cnidaria and Nemertea) were found. Among them, 52 different taxa were collected and pointed out for the first time in Santa Gilla lagoon in this work. 5 - Finally, seasonal and space differences were observed in the abundance values of the main taxonomic groups and in the diversity indices values

Use of axonal projection patterns for the homologisation of cerebral nerves in Opisthobranchia, Mollusca and Gastropoda

Introduction: Gastropoda are guided by several sensory organs in the head region, referred to as cephalic sensory organs (CSOs). These CSOs are innervated by distinct nerves. This study proposes a unified terminology for the cerebral nerves and the categories of CSOs and then investigates the neuroanatomy and cellular innervation patterns of these cerebral nerves, in order to homologise them. The homologisation of the cerebral nerves in conjunction with other data, e.g. ontogenetic development or functional morphology, may then provide insights into the homology of the CSOs themselves. Results: Nickel-lysine axonal tracing (“backfilling”) was used to stain the somata projecting into specific nerves in representatives of opisthobranch Gastropoda. Tracing patterns revealed the occurrence, size and relative position of somata and their axons and enabled these somata to be mapped to specific cell clusters. Assignment of cells to clusters followed a conservative approach based primarily on relative location of the cells. Each of the four investigated cerebral nerves could be uniquely identified due to a characteristic set of soma clusters projecting into the respective nerves via their axonal pathways. Conclusions: As the described tracing patterns are highly conserved morphological characters, they can be used to homologise nerves within the investigated group of gastropods. The combination of adequate number of replicates and a comparative approach allows us to provide preliminary hypotheses on homologies for the cerebral nerves. Based on the hypotheses regarding cerebral nerve homology together with further data on ultrastructure and immunohistochemistry of CSOs published elsewhere, we can propose preliminary hypotheses regarding homology for the CSOs of the Opisthobranchia themselves

Notes on the Mollusca from Site 41DT59, Cooper Lake, Delta County, Texas

This paper focuses on the information about the mollusca from site 41DT59. The author takes the information from Dr. Fullington, the noted malacologist, and illustrates how the archeologist can take the information and apply it to site analysis. This information derived from the analysis mainly supports what the authors have concluded about site 41DT59, but does discuss material not covered in the original text. The analysis is divided into two sections. The information derived from the gastropods is discussed first, and the information derived from the mussels second

СПІВІСНУВАННЯ ДРЕЙСЕН (MOLLUSCA: BIVALVIA: DREISSENIDAE) ТА ПЕРЛІВНИЦЕВИХ (MOLLUSCA: BIVALVIA: UNIONIDAE) У ВОДНИХ ОБ’ЄКТАХ УКРАЇНИ

У статті досліджено співіснування дрейсен (MOLLUSCA: BIVALVIA: DREISSENIDAE) та перлівницевих (MOLLUSCA: BIVALVIA: UNIONIDAE)у водних об'єктах Україн

Unravelling the identity of Pandora species (Bivalvia: Pandoridae) from Southern South America

Four species of Pandora have been reported from southern South America: P. cistula Gould, 1850, P. braziliensis G. B. Sowerby II, 1874, P. diffissa Mabille & Rochebrune, 1889 and P. patagonica (Dall, 1915). The group has received little taxonomic attention in this area, resulting in arbitrary and wrong usage of these names, for which several contradictory synonymies have been proposed. This study provides the first revision of Pandora species living in southern South America, including photographs of the type material and descriptions of shells, gross anatomy and living animals. Out of the four species previously mentioned, P. braziliensis is here regarded as valid, including P. patagonica and P. diffissa as synonyms. The fourth species, P. cistula, remains known only from its type specimen. In addition, a new species, P. brevirostris, is described from the shallow waters of Argentina.Fil: Güller, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; ArgentinaFil: Zelaya, Diego Gabriel. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; Argentin

Heterobranch sea slugs (Mollusca: Gastropoda) from Ascension Island, South Atlantic Ocean

The small volcanic island of Ascension is situated in the middle of the South Atlantic Ocean, more than 1500 km from the coast of Africa, its nearest continental area. To date, eight 'opisthobranch' species were reported from the island. As a result of a recent survey, 10 species were found. Seven species are new records from Ascension: Platydoris angustipes (Morch, 1863), Diaulula sp., Dolabrifera dolabrifera (Rang, 1828), Aplysia parvula Guilding in Morch, 1863 and Caliphylla mediterranea A. Costa, 1867, and two new species: Phidiana mimica sp. nov.; and Felimida atlantica sp. nov. Half of the species found have a wide geographical distribution, being not restricted to the Atlantic Ocean. However, traditional taxonomy based on few characters is probably masking complexes of species.Darwin Initiative (EIDCF012); CNPq-Brazil; DAAD-Germany; DFG [SCHR667/9,13]info:eu-repo/semantics/publishedVersio

Two new Miocene limpets (Fissurellidae) from southern California, with notes on other fossil occurrences of the family in northwestern North America

Two new fissurellid limpets (Mollusca: Gastropoda: Fissurellidae), Fissurella? stantoni n. sp. and Scelidotoma aldersoni n. sp., are described from Miocene deposits in southern California. Fissurella? stantoni is described from a single specimen from the middle Miocene Topanga Canyon Formation in the Santa Monica Mountains, Los Angeles County, California. Scelidotoma aldersoni is described from two specimens, one from the middle Miocene Topanga Canyon Formation, and another provisionally (cf.) identified specimen of an internal mold from the middle Miocene “Vaqueros” Formation on Santa Cruz Island, Santa Barbara County, southern California. Other unreported fossil occurrences of Scelidotoma are a juvenile specimen attributed only to genus collected in the middle Eocene Crescent Formation in Washington state and S. bella from the Pliocene part of the San Diego Formation, San Diego County, California. The Scelidotoma occurrences extend the chronostratigraphic range of S. bella from the Holocene (living) to the middle Pliocene, and the range of the genus back to the middle Eocene