Review of the Papuan millipede genus Acanthiulus Gervais, 1844 (Diplopoda: Spirobolida: Pachybolidae)

The genus Acanthiulus, which has hitherto been known to comprise three accepted species or subspecies endemic to the Papuan region, is revised, rediagnosed and shown to include only a single, quite variable species, A. blainvillei (Leguillou, 1841), with A. blainvillei septemtrionalis Attems, 1914 and A. wollastoni Hirst, 1914 both considered as its new subjective junior synonyms, syn. nov. Pronounced morphological variations, all clearly illustrated here, concern only peripheral characters, but the gonopodal structure remains very stable. Three morphs are distinguished: A, B and C. The distribution of A. blainvillei is mapped, the genus and species apparently being restricted to the Aru Archipelago, East Indonesia and much of New Guinea, both Indonesian and Papua New Guinea. Certain clinal variation patterns and an evolutionary scenario can be suggested in the distribution and polymorphism of the widespread species A. blainvillei at the northern periphery and in the centre of its distribution area.Copyright © 2021, The Entomological Society of Latvia. The attached file is the published version of the article

Naturalis Biodiversity Center (NL) - Chelicerata and Myriapoda

Database contains specimen records from the Chelicerata and Myriapoda collection of the Naturalis Biodiversity Center (Leiden, Netherlands). The zoological specimens come from the National Museum of Natural History (RMNH; Rijksmuseum voor Natuurlijke Historie), later National Museum of Natural History, Naturalis in Leiden and the Zoological Museum Amsterdam (ZMA) and new acquisitions. The old registration numbers of the former institutions (RMNH, ZMA) are also mentioned in the datas

Naturalis Biodiversity Center (NL) - Mollusca

Database contains specimen records from the Mollusca collection of the Naturalis Biodiversity Center (Leiden, Netherlands). The zoological specimens come from the National Museum of Natural History (RMNH; Rijksmuseum voor Natuurlijke Historie), later National Museum of Natural History, Naturalis in Leiden and the Zoological Museum Amsterdam (ZMA) and new acquisitions. This database replaces the dataset "Zoological Museum Amsterdam, University of Amsterdam (NL) – Mollusca_Conidae", "Zoological Museum Amsterdam, University of Amsterdam (NL) – Mollusca_Netherlands", and "Zoological Museum Amsterdam, University of Amsterdam (NL) – Mollusca_Pectinoidea" which were hosted earlier on the GBIF dataportal and contains many new and updated records, especially from the RMNH collection. This dataset is an abstract of the Naturalis production database (BRD) of 2012-12-12. The datasets Zoological Museum Amsterdam, University of Amsterdam (NL) – Mollusca_Types, and Naturalis National Natural History Museum (NL) – Mollusca fossils, are still separately hosted at GBIF, and are not included in this dataset. The old registration numbers of the former institutions (RMNH, ZMA) are also mentioned in the dataset. The Naturalis BC collection contains over 42.000 species of Recent Mollusca. Locality data have only been added in part to this molluscan dataset. Many identifications are original and can be as old as over a century. Many species level names were recently (2011-2012) updated with the help of literature and web based taxonomic databases containing synonymies

Naturalis Biodiversity Center (NL) - Foraminifera

Database contains specimen records from the Foraminifera collection of the Naturalis Biodiversity Center (Leiden, Netherlands). These specimens originate from the collections of the National Museum of Natural History (RMNH; Rijksmuseum voor Natuurlijke Historie), later National Museum of Natural History, Naturalis in Leiden and of the former Zoological Museum Amsterdam (ZMA). On request more information can be provided

Naturalis Biodiversity Center (NL) - Porifera

Database contains specimen records from the Porifera collection of the Naturalis Biodiversity Center (Leiden, Netherlands). These specimens originate from the collections of the National Museum of Natural History (RMNH; Rijksmuseum voor Natuurlijke Historie), later National Museum of Natural History, Naturalis in Leiden and of the former Zoological Museum Amsterdam (ZMA). On request more information can be provided

Sepiola tridens spec. nov., an overlooked species (Cephalopoda, Sepiolidae) living in the North Sea and north-eastern Atlantic Ocean

Arecent study of the molecular phylogeny of in the North Sea living Sepiolinae confirmed the occurrence of Sepietta oweniana, Sepietta neglecta, Sepiola pfefferi and Sepiola atlantica. Among the Sepiola atlantica samples a third Sepiola species was recognized for the first time. This undescribed species is genetically closely related to S. atlantica. Morphological studies have shown consistent differences in the length of the tentacular clubs, in the hectocotylus and in skin patterns. Ecological differences are mainly found in water depth. The newly recognized species is described here as Sepiola tridens sp. nov

The diversity of molluscan faunas in marine lakes of Raja Ampat, West Papua, Indonesia

Marine lakes are bodies of seawater that are land-locked and maintain a subterranean connection to the surrounding sea. Here, we document the species diversity of benthic molluscs in 11 marine lakes in Raja Ampat, West Papua, Indonesia, using the roving diving survey method. We specifically tested for relationships between species richness and lake size and the degree of connection to the surrounding sea, and tested potential environmental drivers of community structure. We recorded 73 species, belonging to the classes Gastropoda (48 species, comprising 36 genera and 25 families), Bivalvia (24 species, consisting of 17 genera and 12 families), and Polyplacophora (one species). Molluscs from marine lakes are a subset of species also occurring in coral, seagrass, mangrove, and rocky shore habitats in the open sea. We found lake communities to mostly consist of grazers and filter feeders. The number of mollusc species significantly increased with increasing connection to the surrounding sea, but not with increasing surface area, indicating that dispersal potential may be the main driving force. Furthermore, we observed no significant influence of the environment on the variation in mollusc species composition among marine lakes. Still, we observed certain species to be exclusively present in either high or low-connected lakes, indicating a potential effect of environmental filtering. Marine lakes provide a unique ecosystem for diverse mollusc assemblages and as such should be protected