A revision of the gobiid fish genus Pseudogobius/ (Teleostei, Gobiidae, Tridentigerinae), with description of seven new species from Australia and South-east Asia

The tridentigerine genus Pseudogobius is widespread, from temperate to tropical areas of the Indo-west Pacific. A morphological review of the genus was carried out, with the initial focus on South-east Asian and Australian species. There are about 21 nominal species in the genus; however, the type specimens for some nominal species are missing. Our work recognises 15 valid species so far, including seven new species, which are described herein: P. aquilonius n. sp., P. cinctus n. sp., P. eos n. sp., P. hoesei n. sp., P. jeffi n. sp., P. rhizophora n. sp. and P. verticalis n. sp. We also conclude that P. poicilosoma (Bleeker, 1849) is the senior synonym of P. javanicus (Bleeker, 1856). Pseudogobius poicilosoma, P. gastrospilos (Bleeker, 1853) and P. javanicus are accepted here as conspecific, although the types are in poor condition (note that all three names were given to specimens collected within close proximity to each other in coastal Java, Indonesia). A key to valid species is presented. The revision benefited from an adaptive feedback loop with companion genetic analyses, with the most comprehensive data available for the Australian region. Broader preliminary genetic data suggest the potential for recognition of additional cryptic species, with the current study providing a platform for future systematic work. Pseudogobius are a prominent part of estuarine biodiversity in the Indo-west Pacific, and this study helps to highlight the need to better understand the taxonomy and conservation requirements of cryptobenthic fishes.

The correct name for Oxyurichthys longicauda Steindachner and a few other errors

In 2015, Pezold and Larson published a revision of the gobiid genus Oxyurichthys, and made an error in their use of the name O. uronema (Weber) for one of the species. The reasons for this would make a fine example of one of Evenhuis' taxonomic impediments to nirvana (2007). Pezold and Larson first considered collaborating on this work in 1983, but this did not happen until nearly a decade later. Intensive work began in 1996; by then Larson had examined syntypes of both species in 1988 and determined that Gobius uronema Weber, 1909, was the same species as Gobius longicauda Steindachner, 1893.

A revision of the fish genus Oxyurichthys (Gobioidei: Gobiidae) with descriptions of four new species

The widespread tropical gobionelline fish genus Oxyurichthys is monophyletic due to its species sharing two characters considered derived within the Stenogobius Group of the Gobionellinae (Gobioidei: Gobiidae), a transversely broadened (spatulate) third neural spine that is usually bifid, and no preopercular cephalic lateralis canal. It is most closely related to Oligolepis, also of the Indo-west Pacific, and Ctenogobius, an Atlantic-eastern Pacific genus. Sixteen valid species of Oxyurichthys are redescribed and illustrated and four new species are described, O. limophilus from the western Indian Ocean, O. rapa from French Polynesia, and O. chinensis and O. zeta from the western Pacific. Nineteen species share two additional synapomorphies, a rounded fleshy tongue and a palatine lacking an elongate posterior strut, and form the sister group to the plesiomorphous Oxyurichthys keiensis, known from South Africa and Madagascar. One species, O. stigmalophius, occurs in the western Atlantic. There are no records of this genus from the continental eastern Pacific or the eastern Atlantic. Previous accounts from the Gulf of Guinea region of West Africa are references to Gobionellus occidentalis. Many Oxyurichthys species are limited to shallow estuarine and coastal waters with bottom substrates of silt or other fine sediments, but several are known from depths exceeding 10 m and are often collected by trawling.

First record of the gobiid fish Aulopareia ocellata (Teleostei: Gobiidae) from Qeshm Island, The Gulf, with discussion of its generic placement

The poorly known gobiid fish species Aulopareia ocellata is recorded for the first time from the intertidal zone of north-east Qeshm Island, The Gulf, Iran. The species has been referred to previously as Parachaeturichthys ocellatus, but here is placed in Aulopareia, pending a revision of the genus. The morphological features of A. ocellata are described and compared with congeners and brief comparisons of the genera Aulopareia and Parachaeturichthys are provided. A full description of the species is given, with illustration of the sensory papillae and head-pore pattern. This species has previously been recorded from India (Mumbai) and Pakistan (Karachi).

A new species of mudskipper, Periophthalmus takita (Teleostei: Gobiidae: Oxudercinae), from Australia, with a key to the genus

A new species of mudskipper (Gobiidae: Oxudercinae) from northern Australia is described. This species was previously misidentified as P. takita [corrected] Eggert, 1935 . Periophthalmus takita sp. nov. can be distinguished from its congeners by the following suite of characters: modally VIII spines in the first dorsal fin; second dorsal and anal fins with I, 11-12 rays; shape and color pattern of the first and second dorsal fins; and the extent of fusion between the two innermost rays of the pelvic fin. A re-diagnosis of P. takita [corrected] is provided, as well as a revised key to the genus Periophthalmus .