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aqua International Journal 3(2)



Volume 3, Issue 2 – September 1998

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Volume 3, Issue 2 – September 1998

Uwe Romer and Frank Warzel: Apistogramma arua sp. n. (Teleostei: perciformes: Cichlidae), a new species of dwarf cichlid from the Rio Arapiuns system, Para State, Brazil, pp. 45-54

Apistogramma arua sp. n. is described on the basis of four specimens collected in a small igarapé near Arua in the lower course of the Rio Arua. This relatively small species (males up to 45 mm SL) may be related to the species of the A. cacatuoides complex sensu stricto as well as to the A. trifasciata-group, but at the time has to be placed incertae sedis within the genus. A. arua sp. n. is characterised by a wedge-shaped spot on the abdominal flank beneath the lateral band, which sometimes, depending on mood, is modified to a line or band between the gill cover and the frontal base of the anal fin, or to three indistinct abdominal bands formed by three rows of half-moon-shaped spots. Males additionally exhibit a forked caudal fin and extended membranes to the first 5-7 dorsal fin lappets.

Ronald E. Watson and I-Shiung Chen: Freshwater gobies of the genus Stiphodon from Japan and Taiwan (Teleostei: Gobiidae: Sicydiini), pp. 55-68

Three species of the freshwater goby genus Stiphodon (Sicydiini) recognized from Japan and Taiwan, are compared in text and tabular information. Stiphodon atropurpureus (Herre, 1927) is rediagnosed. Common in the Philippines, it is rare in Japan and Taiwan. It is distinguished in usually having 15 pectoral rays, 9 segmented second dorsal fin rays, and 30-33 lateral scales. Males are distinguished from other species in having a patch of white fatty tissue posterior to lower base of pectoral fin, first dorsal fin spines not elongate or filamentous, body and head grayish in preservation, in life with a bright metallic green stripe above the midline turning bright blue after death. Females with a zigzag-like midlateral stripe and never with fatty tissue posterior to pectoral base. Stiphodon imperiorientis sp. n., is a rare species known from 10 specimens from Iriomote Island, Ryukyu Islands, and has 15 (15-16) pectoral rays, 9 segmented second dorsal fin rays, and 35-36 (34-36) lateral scales. It is distinguished in males always being without white fatty tissue posterior to lower base of pectoral fin, spines 4 and 5 elongate in first dorsal fin, in preservation body and head mostly tannish or brownish with dusky bars on trunk and caud-al peduncle, in life head bright blue, laterally blue between dusky bars. Female with midlateral stripe appearing mostly straight with blotches present ventral to second dorsal and on caudal peduncle. Stiphodon percnopterygionus sp. n., is a fairly common species in the islands of Iriomote and Ishigaki, Ryukyu Islands, Japan and eastern Taiwan, but very rare in Micronesia. It is distinguished by usually having 14 pectoral rays and 10 segmented second dorsal fin rays. Males are unusual in having two distinctive colour phases, young males mostly blue and older males mostly orange: colour phases are associated with size and not geographical distribution.

Gerald R. Allen and Samuel J. Renyaan: Three New Species of Rainbowfishes (Melanotaeniidae) from Irian Jaya, Indonesia, pp. 69-80

Three new melanotaeniid fishes are described from Irian Jaya. Melanotaenia batanta sp. n. is described from 12 specimens, 39.1-87.4 mm SL, collected at Batanta Island. It is most closely related to M. fredericki, but has a higher modal number of dorsal fin rays and fewer cheek scales. The remaining two species were collected in the Wapoga River system of northern Irian Jaya. Melanotaenia rubripinnis sp. n. is described from 51 specimens, 25.0-102.3 mm SL. It is most closely allied to M. vanheurni, but differs in colour, and generally has fewer soft dorsal rays and fewer cheek scales. Glossolepis leggetti, sp. n. is described from 79 specimens, 35.4-92.9 mm SL. It is most closely related to G. multisquamatus, but usually has a higher number of soft dorsal rays, fewer predorsal scales and a more slender body shape in adult males.

Rudie H. Kuiter: Pipefishes of the Syngnathid Genus Dunckerocampus (Sygnathiformes: Sygnathidae) with a description of a New Species from the Indian Ocean, pp. 81-84

Whitley, 1933, is recognised as valid pipefish genus, rather than a sub-genus of Doryrhamphus Kaup, 1856, as treated by Dawson, 1985. A new species, D. boylei, with a distinctive broadly-banded pattern is described from the Indian Ocean, bringing the total number of species in the genus to six. Notes and underwater photographs of species occurring sympatric with D. boylei are provided.

Rudie H. Kuiter: A new Pygmy Angelfish (Teleostei: Perciformes: Pomacanthidae) from the Coral Sea, pp. 85-88

A new species of pomacanthid fish, genus Centropyge, is described from the Coral Sea. Centropyge woodheadi sp. n. lives in clear offshore conditions and is known from the Coral Sea to the Solomon Island and Fiji region. It is sympatric with the closely related C. heraldi Woods & Schultz, 1953, that is widespread in the West Pacific. The two species differ with regards to colour pattern, length of head and length of median fins.

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Weight 0.25 kg
Dimensions 26.6 × 20.3 × 0.3 cm
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