A new species of the genus Stiphodon from Palawan, Philippines (Gobiidae: Sicydiinae)

Abstract

Palawan is an island in the western Philippines, and the freshwater fish fauna of this island has received limited research attention. In the present study, a new goby species, Stiphodon palawanensis, is described on the basis of 57 specimens collected from freshwater streams on the island. This species can be distinguished from its congeners by having nine segmented rays in the second dorsal fin, 15 rays in the pectoral fin, a pointed first dorsal fin in males, premaxilla with 45-71 tricuspid teeth, the nape and posterior half of the occipital region covered by cycloid scales, 9-11 dusky transverse bars laterally on the trunk and tail, a line of black blotches (in male) or a black band (in female) on the distal part of the second dorsal fin, and the first dorsal and pectoral fins lacking distinctive markings. The new species has been found only on the Sulu Sea side of central Palawan. Three congeners, S. percnopterygionus, S. atropurpureus, and S. pulchellus have also been recorded from Palawan.

Northernmost Record of <i>Stiphodon multisquamus</i> (Gobiiformes: Oxudercidae) Based on a Specimen from Wakayama, Japan

“…The morphologies of our material almost corresponded to them. Although the numbers of tricuspid teeth on the premaxilla (37) and horizontal teeth on the dentary (35) were smaller than the previous reports (40-66 and 39-67, respectively; Maeda and Saeki 2013; , it was probably caused by the smaller body size of our material (29.4 vs. 29.8-64.0 mm SL), as in this genus larger individuals generally have more teeth (Maeda and Palla 2015). Our specimen was identified as female based on a rectangular urogenital papilla, shape and size of the first and second dorsal fins [it is shown in a photograph of the specimen taken when it was alive (Fig.…”

First and recurrent records of Stiphodon surrufus Watson &amp; Kottelat, 1995 (Gobiiformes, Gobiidae, Sicydiinae), a naturally rare amphidromous goby, in Sulawesi, Indonesia

“…Understanding the distribution of sicydiine gobies is important in the context of amphidromous species diversity and biogeography (Ebner et al 2011;Maeda and Palla 2015;Hasan et al 2021). Our new distributional data on S. surrufus reinforces indications of historical and/or contemporary connectivity of amphidromous species between Sulawesi, in particular the Gulf of Tolo coast of eastern Sulawesi, and other islands in Wallacea and eastern Indonesia more generally, including the Sahul Shelf ecoregion.…”

Short Communication: Presence of the vulnerable freshwater goby Sicyopus auxilimentus (Gobiidae, Sicydiinae) on Sangihe Island, Indonesia

“…Among other biological topics, new records of vulnerable fish contribute to understanding species diversity and biogeography (Hasan et al 2019a,b;Saptadjaja et al 2020;Ihwan et al 2020). As reported in this paper, the new record of S. auxilimentus has improved knowledge of the species, as it extends recorded distribution range of the species (Thuesen et al 2011;Maeda and Palla 2015).…”