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1 March 2014 A New Species of Homalopteroides (Teleostei: Balitoridae) from Sarawak, Malaysian Borneo
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Homalopteroides avii, new species, is described from the Rajang River basin, Sarawak, Malaysian Borneo. It is distinguished from all other species of Homalopteroides by a wider gape of 28.5–33.3% HL vs. 22.3–24.2% for H. wassinkii, 20.0–28.4% for H. modestus, 19.1% for H. rupicola, 19.1–27.3% for H. smithi, 20.0–23.2% for H. stephensoni, 20.2–26.9% for H. weberi, 18.4–26.0% for H. tweediei, 17.3% for H. indochinensis, 17.4–21.2% for H. nebulosus, and 18.0–19.0% for H. yuwonoi. It is further distinguished from species of Homalopteroides by the presence of a lateral cephalic stripe vs. absence in H. modestus, H. rupicola, H. smithi, H. tweediei, H. nebulosus, and H. yuwonoi; deeper caudal peduncle, 10.1–10.9% SL, vs. 8.4–9.0% for H. wassinkii, 8.7% for H. rupicola, 7.7–9.1% for H. smithi, 6.1–6.6% for H. stephensoni, 6.7–8.0% for H. weberi, 8.0–9.4% for H. tweediei, 9.3–9.8% for H. nebulosus, 8.7% for H. indochinensis, and 7.3% for H. yuwonoi; circumpeduncular scale count of 20–22 vs. 16 for H. rupicola, H. stephensoni, H. nebulosus, H. indochinensis, and H. yuwonoi, 14–16 for H. tweedei, and 16–18 for H. smithi and H. weberi; total pelvic-fin ray count of 9 vs. 10 for H. stephensoni, H. weberi, and H. yuwonoi. The species is relatively large for the genus, reaching 52.9 mm SL.

© 2014 by the American Society of Ichthyologists and Herpetologists
Zachary S. Randall and Lawrence M. Page "A New Species of Homalopteroides (Teleostei: Balitoridae) from Sarawak, Malaysian Borneo," Copeia 2014(1), 160-167, (1 March 2014).
Received: 8 May 2013; Accepted: 1 September 2013; Published: 1 March 2014

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