The diversity of the sedimentary environment and molluscs is rich in intertidal zone Yellow Sea Bohai Sea. At present, many investigations focus on macromolluscs, while micromolluscs seriously underestimated. In this study, survey was carried out collection preservation micromolluscs, as well preparation methods morphological characteristic structures by scanning electron microscopy (SEM) were ...

The present paper aims at the description of two new species Euthyneura (Heterobranchia: Gastropoda) in Early Jurassic (early Pliensbachian) marine deposits Chubut Basin southern Patagonia, Argentina. Cossmannina australis nov. sp. and Cylindrobullina caquelensis were found Cerro Caquel locality located western slope Sierra de Tecka río valley. yielded ammonite Eoamaltheus (E. meridianus Hilleb...

of development up to ready-to-hatch juveniles 2.5 mm in length. Based on their morphology and development in egg masses maintained in the laboratory, the embryonic period for B. hodgsoni is estimated to be up to 10 years, and for D. kerguelenensis 13 months. Thus, B. hodgsoni has the largest egg capsules and probably the largest hatchlings of any mollusc. Chemical analyses of D. kerguelenensis ...

The evolution and diversification of euthyneuran slugs and snails was likely strongly influenced by habitat transitions from marine to terrestrial and limnic systems. Wellsupported euthyneuran phylogenies with detailed morphological data can provide information on the historical, biological and ecological background in which these habitat shifts took place allowing for comparison across taxa. A...

Abstract Members of the widely distributed and common nudibranch family Phyllidiidae are often easily spotted in marine environment because their conspicuous colours obvious presence on reef. They interesting with regard to defensive chemical compounds that may lead new drug discoveries. Despite abundance, is also well known for its taxonomic problems difficulties species identification due ver...

Kết quả đã xác định được 62 loài và phân ốc cạn có ở khu vực nghiên cứu, thuộc 18 họ, 4 bộ, 3 lớp. Phân lớp Neritimorpha 2 họ (Helicinidae, Hydrocenidae). Caenogastropoda (Cyclophoridae, Diplommatinidae, Pupinidae). Heterobranchia số nhiều nhất với 13 (Veronicellidae, Achatinidae, Diapheridae, Streptaxidae, Plectopylidae, Gastrocoptidae, Clausiliidae, Philomycidae, Chronidae, Trochomorphidae, A...