Ichthyological Research

, Volume 66, Issue 1, pp 97–103 | Cite as

A new species of the blind goby Caecogobius (Gobioidei, Gobiidae, Gobionellinae) from a cave system on Mindanao Island, the Philippines

  • Helen K. LarsonEmail author
  • Daniel E. M. Husana
Full Paper


A new species of the eyeless goby genus Caecogobius is described from a cave system on Mindanao Island, the Philippines. Caecogobius personatus sp. nov. is the second cave-obligate fish ever discovered from the Philippine archipelago. The first species, Caecogobius cryptophthalmus Berti and Ercolini 1991 was recorded from Samar Island, an adjacent island north of Mindanao. The new species differs from its only congener, C. cryptophthalmus, in having a finely ridged fleshy area over the orbit and fleshy flap-like sensory papillae on fleshy raised ridges (the sensory papillae in C. cryptophthalmus are all small and evenly sized, not fleshy or flap-like) and having all elements of the second dorsal fin segmented (first element unsegmented in C. cryptophthalmus). The relationship of these two Caecogobius to each other and to other gobionellines is not known.


Gobiidae Caecogobius New species Cave systems Philippines 



We offer our many thanks to Heok Hui Tan of ZRC, who facilitated the loan of the specimens and provided beautiful X-rays of them. Thanks also are due to Gavin Dally of MAGNT, who made sure the fish arrived safely. We also appreciate the assistance of Marivene Manuel-Santos of the Philippine National Museum for facilitating the storage of the specimens. D. E. M. Husana would like to express his great appreciation to his friends in Mindanao. There are no exact words to describe how thankful he is for their hospitality, generosity and field assistance during his many research trips to the region: the Honorable Mayor Albin Magdamit and his staff, especially Noradel Martinez and Marigyn Kamita who showed their eagerness to protect the natural environment in their town; the PMC outdoor group, especially Arnel Pasilan, Almar Lambaco, Joelito Dumdum, Winsome Berdida and Joseph Mortiz and all the other members for their assistance in D. E. M. Husana’s many biological expeditions in the region; and the barangay chairman, Benecio Manliguez, for providing security and a local guide. This research is permitted by the Department of Environment and Natural Resources (Wildlife Gratuitous Permit No. R13-2014-004).


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Copyright information

© The Ichthyological Society of Japan 2018

Authors and Affiliations

  1. 1.Museum and Art Gallery of the Northern TerritoryDarwinAustralia
  2. 2.Museum of Tropical QueenslandTownsvilleAustralia
  3. 3.Environmental Biology Division, Institute of Biological Sciences, College of Arts and SciencesUniversity of the Philippines Los BañosLos BañosPhilippines

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