Invertebrate Systematics Invertebrate Systematics Society
Systematics, phylogeny and biogeography

Invertebrate Systematics

Invertebrate Systematics

Invertebrate Systematics publishes significant contributions and reviews on the systematics, phylogeny and biogeography of all invertebrate taxa. Read more about the journalMore

Editor-in-Chief: Gonzalo Giribet

Current Issue

Invertebrate Systematics

Volume 30 Number 6 2016

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Jellyfish blooms have become increasingly frequent, but we still don’much about these organisms. New morphological data and a phylogenetic analysis have enabled the redescription of a recently discovered species (Pelagia benovici) from the Mediterranean Sea. This jellyfish is moved to a new genus within Pelagiidae named Mawia. Mawia benovici, comb., nov. is a sister taxon to Sanderia malayensis. Photograph: Mawia benovici, sp. nov., Piran, Slovenia, by Tihomir Makovec.

IS16002Molecular phylogenetic analysis and comparative morphology resolve two new species of olive-tree soil related dagger nematodes of the genus Xiphinema (Dorylaimida : Longidoridae) from Spain

Antonio Archidona-Yuste, Juan A. Navas-Cortés, Carolina Cantalapiedra-Navarrete, Juan E. Palomares-Rius and Pablo Castillo
pp. 547-565
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Xiphinema species are an important group of plant-parasitic nematodes with a high number of species and distributed almost worldwide. The aim of this work is to describe two new species of Xiphinema (X. macrodora, sp. nov. and X. oleae, sp. nov.) using an integrative approach (morphologically, morphometrically and molecularly). This study expands the biodiversity and morphological traits of this genus. Image: line drawing of the female lip region of Xiphinema macrodora, sp. nov.

IS16017Unexpected diversity in the relictual European spiders of the genus Pimoa (Araneae : Pimoidae)

Stefano Mammola, Gustavo Hormiga, Miquel A. Arnedo and Marco Isaia
pp. 566-587
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Two spider species new to science have been discovered in the Western Italian Alps, one of the most important biodiversity hot spot in Europe. The new species belong to a group of cave dwelling spiders (Pimoa) represented so far in Europe by two species only. According to the molecular analysis, these spider species originated as a result of dramatic climatic change occurring in Europe between 13 and 1 million years ago. Photograph: Pimoa graphitica, sp. nov., by Francesco Tomasinelli.

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High-mountain regions are known to harbour considerable biodiversity, although it is not all well known, especially in world’s largest mountain range, the Himalayas. Intensive field surveys of limnic molluscs resulted in the discovery of a species that can be clearly distinguished from all other sphaeriid bivalve species with oriental biogeographical affinity occurring in Nepal. Our findings highlight the importance of studies of the freshwater biodiversity at high-altitude ecosystems. Images: line drawings of left – Pisidium alexeii, sp. nov. and right – P. prasongi.

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Morphology and distribution of body scales are fundamental in the classification and evolution of Entomobryidae. Molecular phylogeny clustered the new genus Lepidodens, having pointed scales on dens, with Entomobryinae rather than Seirinae. This study clearly undermines the traditional separation of Entomobryinae and Seirinae/Lepidocyrtinae, and demonstrate that dental scales could occur in all entomobryid subfamilies containing scaled taxa. Photographs: scales in Lepidodens similis, gen. and sp. nov.

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The description here of two new shark tapeworms belonging to the genus Calliobothrium suggests that diversity in this genus has been underreported and that species exhibit tighter host-specificity than once thought. Molecular phylogenetic analyses of species of Calliobothrium and the closely related genus Symcallio provide insight into the evolution of diagnostic morphological features. Comparison of this phylogeny with that of their hosts, sharks of the genus Mustelus, reveals interesting host association patterns. Image: line drawing of Calliobothrium cisloi, sp. nov. scolex.

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Antarctica is an ice-dominated continent and all its terrestrial and freshwater habitats are fragmented, which leads eventually to speciation. Acutuncus antarcticus is the most common Antarctic tardigrade, and morphological and molecular analyses elucidated its genetic diversity and distribution. All analysed specimens were morphologically indistinguishable and presented the same 18S rRNA sequence, while cytochrome c oxidase subunit I analysis showed higher variability. Acutuncus antarcticus can still be considered a pan-Antarctic species, although there is the potential for future speciation events. Photograph: Acutuncus antarcticus, from Crater Cirque, Victoria Land, Antarctica.

Just Accepted

These articles have been peer reviewed and accepted for publication. They are still in production and have not been edited, so may differ from the final published form.

IS16059, Accepted 10 October 2016

Advancing Genomics through the Global Invertebrate Genomics Alliance (GIGA)

Christian Voolstra, Jose Lopez, Gert Wörheide, Marcin Adamski, Shobhit Agrawal, Agostinho Antunes, Manuel Aranda, Andy Baxevanis, Mark Blaxter, Thomas Bosch, Heather Bracken-Grissom, Jonathan Coddington, Timothy Collins, Keith Crandall, Mikael Dahl, Daniel Distel, Casey Dunn, Michael Eitel, Jean-Francois Flot, Gonzalo Giribet, Fabrizio Ghiselli, Stephen Haddock, Kevin Kocot, Yi Liew, Audrey Majeske, Bernhard Misof, Christopher Mungall, Stephen O'Brien, Timothy Ravasi, Mauro de Freitas Rebelo, Ana Riesgo, Christine Schnitzler, Anja Schulze, Billie Swalla, Denis Tagu, Robert Toonen, Marcela Uliano da Silva, Sergio Vargas and Xin Zhou

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