The family Plasmobatidae is herewith reported for the first time from Gabon and Solenozetes makokouensis n. sp. is described. The holotype was collected from litter in dense evergreen humid forest, Makokou, Province Ogoové-Ivindo, north-eastern Gabon. The species is described and illustrated based on adult females. The new species is easily distinguishable by the following combination of character states: cerotegumental layer amorphous, with small tuberculations mixed with granulations; ro seta falcate, inserted on forward-extending visorlike protuberance; in seta wrapped in cerotegumental granulate layer; prodorsal anterior zone complex with irregular protuberances; bothridium horseshoe-shaped, internal rings appearing gear-like; sensillus filiform; notogaster anteriorly with semicircular furrow and depressed zone; macropores opening on foveae; notogastral microsculpture irregular foveate pattern; opisthosomal gland apophysis conical with rounded tip; five pairs of notogastral setae. The genus Solenozetes is redefined.

Rossodinae, a subfamily characteristic of the pristine Malagasy rainforests (Trichoptera, Philopotamidae).The Rossodinae Özdikmen & Darilmaz, 2008, one of the three sub-families of Philopotamidae Stephens, 1829 are only known by two type specimens from the Tsaratanana Mountain, from which this subfamily has been described. An inventory of the Malagasy aquatic fauna has resulted in the discovery of a more abundant material that includes 15 species, all new and described here: Rossodes mantadia n. sp., R. pilakai n. sp., R. hertui n. sp., R. goodmani n. sp., R. manantenina n. sp., R. fabienneae n. sp., R. andohahela n. sp., R. ambreensis n. sp., R. namorona n. sp., R. marojejyiensis, R. langrandi n. sp., R. humberti n. sp., R. rakotonirinai n. sp., R. ambatomisana n. sp. and R. ankaratra n. sp. The morphological study confirmed the monophyly and the antiquity of the lineage. One of the plesiomorphic characters, the furca 4 of the male hindwings, has not been observed among the new species and exist only in the species originating from the Tsaratanana. The deformation of the inferior appendages, a remarkable apomorphy, is present in the whole lineage. Characters of male genitalia distinguish the different species, particularly the tenth tergite, the superior appendages and the internal sclerites of the phallic apparatus. The genus occurs from North to South of the island, from sea level up to 1800 m. It is strictly confined to small creeks in humid pristine forests. Its distribution is limited to the eastern slope and some of the last forests in the Central Highlands. This group illustrates the decisive effect of the vegetation on the physical and chemical conditions of running waters and, as a consequence, on aquatic wildlife. The specific distributions are small, generally limited to a single watershed.

A computerized update of the diversity of locusts and grasshoppers has been achieved for Morocco, Algeria, Tunisia, and Western Sahara. 241 species were recorded belonging to five families: Charilaidae Dirsh, 1953, Pamphagidae Burmeister, 1840, Pyrgomorphidae Brunner von Wattenwyl, 1882, Acrididae MacLeay, 1821 and Dericorythidae Jacobson & Bianchi, 1905. Diagnosis is provided for species, genera and families, together with identification tools, by means of a computer-assisted identification procedure, using the software Xper2. Descriptive sheets of each taxon include nomenclatural data, diagnostic characters, and distributional maps, together with photographs of male and female specimens. This base is located on the website “Muséum des Scientifiques” of the Muséum national d'Histoire naturelle, Paris, at the following address  http://acrinwafrica.mnhn.fr.

The genus Amphithectus Hartig, 1840 is reviewed and differentiated from Sarothrus Hartig, 1840. The type species Amphithectus areolatus Hartig, 1840 is redescribed and a new species, Amphithectus coriaceus n. sp., is described. This new species is the first Amphithectus species described since the description of the type species in 1840. Amphithectus coriaceus n. sp. is characterised by having fine coriaceous sculpture in the head and mesoscutum. Both species are fully illustrated with SEM pictures.

Deep-sea pycnogonid material collected during the N/O Alis Campagnes SalomonBOA 3 to the Solomon Islands in 2007, Terasses to New Caledonia in 2008, Tarasoc to the Tuamoto Archipelago and Tarava Seamounts in 2009, Biopapua to Papua New Guinea in 2010, and Exbodi to New Caledonia in 2011, has been analyzed. This includes the first collection of deep-sea pycnogonids from the waters of Papua New Guinea. The material includes 71 specimens from 14 species in seven genera. Most are frequently-recorded species of the genus Colossendeis, but there are also four species new to science, Ascorhynchus quartogibbus n. sp., Cilunculus roni n. sp., Phoxichilidium alis n. sp., Pycnogonum papua n. sp. A specimen from New Caledonia, identified by Stock in 1997 as Pycnogonum occa Loman, 1908, but not figured or described, has been re-examined, and found also to be a distinct species, Pycnogonum staplesi n. sp.

This study of monogenean species of Ligophorus Euzet & Suriano, 1977 from Liza spp. (Mugilidae) from the Northwestern African coast identifies the occurrence of four new species. Ligophorus gabrioni n. sp. on Liza falcipinnis (Valenciennes, 1836) is characterized by a small antero-median protuberance and two lateral and symmetrical expansions on the ventral transverse bar; a tubular accessory piece distally expanded; and a vagina that is not sclerotised (not visible). Ligophorus benhoussai n. sp. on Liza grandisquamis (Valenciennes, 1836) is characterized by a very long sickle-shaped accessory piece, which is wide at the base and tapering at the end, and a α-shaped vagina. Also found on Liza grandisquamis were Ligophorus bazairii n. sp. and Ligophorus hamzati n. sp. The former is characterized by a tubular bottle-opener shaped accessory piece; whereas the latter is characterized by a tubular accessory piece with a bifurcated distal extremity whose branches are also bifurcated. No Monogenea were found on the endemic Liza bandialensis Diouf, 1991. In our opinion, the differences in monogenean species richness that exist among the various hosts may be due to fluctuations of host populations as the result of bottleneck or vicariant events.

The taxonomy of flabelligerid polychaetes has been mainly based on chaetal features; however, some confusion has occurred due to the lack of standardization of their shapes. Therochaeta Chamberlin, 1919 was proposed for Stykrioides collarifer Ehlers, 1887 because it has pseudoCompound neurohooks and a collar-shaped anterior shield made of cemented sediment particles. The shield is made of particles of varying size and extends along the first three-two chaetigers, usually covering them completely. There are some species described as closely allied to Therochaeta collarifera (Ehlers, 1887) but without pseudoCompound neurohooks and less developed anterior shields. The revision of all available material has allowed the recognition of two different body patterns, especially with regard to the type of neurochaetae present in some anterior chaetigers. As a result, Therochaeta is restricted and a new genus, Paratherochaeta n. gen., is herein proposed. Therochaeta includes four species besides the type species: Therochaeta caudata (Rioja, 1963) n. comb, and Therochaeta pacifica Fauchald, 1972 from the Eastern Pacific Ocean, Therochaeta fauchaldi n. sp. from the Gulf of Mexico, Therochaeta flabellata (Sars in Sars, 1872) from the Norwegian Sea, from the Eastern Pacific Ocean. Paratherochaeta n. gen., with Therochaeta antoni Kirkegaard, 1996 from the Bay of Bengal, Indian Ocean as the type species, includes seven other species: Paratherochaeta africana (Rullier, 1965) n. comb., n. stat., Paratherochaeta augeneri n. sp. and Paratherochaeta scutigeroides (Augener, 1918) n. comb, from Western Africa, Paratherochaeta coronata (Ehlers, 1908) n. comb, from the Western Indian Ocean, Paratherochaeta ehlersi n. sp. from the Southwestern Indian Ocean, Paratherochaeta orensanzi n. sp. from the Southwestern Atlantic Ocean, Paratherochaeta scutigera (Ehlers, 1887) n. comb, from the Grand Caribbean Sea.