Volume 13, Issue 1, 25 October 2007
Volume 13, Issue 1 – 25 October 2007
John E. Randall and Rudie H. Kuiter: Wetmorella tanakai, a new wrasse (Perciformes: Labridae) from Indonesia and the Philippines, pp. 1-6
The new labrid fish Wetmorella tanakai is described from three specimens, 35.7 to 42.0 mm in standard length: one collected by the authors from a coral reef in 21 m off the Indonesian island of Flores, and two obtained in the aquarium trade from southern Sulawesi. The species is also known from a photograph of a Philippine fish. It is distinguished from the two other species of Wetmorella, W. albofasciata and W. nigropinnata, by having a narrow oblique white bar behind the eye and two parallel, narrow, white bars in the middle of the body that are slightly oblique. Wetmorella albofasciata has two narrow white bars on the body, but they converge as they pass ventrally. Wetmorella nigropinnata has two white bars on the body only as juveniles and subadults, but the bars are broad and slightly oblique in the other direction. Wetmorella tanakai also has a longer head, longer snout, and narrower interorbital space.
Wetmorella nigropinnata, subadult, Flores, Indonesia. Photo by R. H. Kuiter
Wilson J. E. M. Costa: Kryptolebias gracilis n. sp. (Teleostei: Cyprinodontiformes: Rivulidae): a new killifish from the Saquarema Lagoon basin, southeastern Brazil, pp. 7-12
Kryptolebias gracilis n. sp. from the Mato Grosso River drainage of the Saquarema Lagoon basin, southeastern Brazil, is described. It is similar to K. brasiliensis in morphometric characters and general colour pattern. Both species share at least four colour patterns unique among congeners, supporting a hypothesis of sister group relationship between them: horizontal rows of greenish blue spots and blue bars
on the flank, a dark brown stripe on the isthmus, dark brown and white bars on the basal portion of the anal fin in males and horizontal rows of pale golden to pale blue spots on the flank in females. Kryptolebias gracilis differs from K. brasiliensis by having fewer anal-fin rays, fewer scales in the longitudinal series, fewer mandibular neuromasts, a shorter lower jaw and a dark grey spot on the dorsal portion of the
pectoral-fin base. The new species also differs from all its congeners in having a small size, with a maximum recorded adult size of 27.6 mm SL.
Kryptolebias gracilis, UFRJ 6450, male, holotype, 26.9 mm SL (one day after collection); Brazil: Estado do Rio de Janeiro: Saquarema. Photo by W. J. E. M. Costa
Richard Winterbottom and Margaret Zur: Three new species of genus Trimma from Palau, Western Pacific (Percomorpha: Gobiidae), pp. 13-24
Three new species of the Indo-Pacific gobiid genus Trimma are described, based primarily or entirely on material from Palau. Trimma gigantum n. sp. is characterized by the presence of predorsal scales, elongate dorsal spines, six dark saddles along the dorsum on a yellow background, fully scaled cheek and opercle, a fifth pelvic fin ray that is branched dichotomously once, and large adult size (to 30 mm SL). It appears to be a relatively deep-water species (57-73 m). Trimma randalli n. sp. also has a yellowish body, and scales on the cheek, opercle and in the predorsal midline, but lacks saddles across the dorsum and has a black caudal fin edged with white. There is a photographic record of this species from the Philippines. Trimma tauroculum n. sp. is immediately distinguishable from all other described species by the presence of a large (about 1.25 times pupil diameter) brown-black ocellated spot on the upper body, its anterior margin immediately above the pectoral-fin base, no scales in the predorsal midline, and no elongate dorsal spines. There is a photographic record of this species from Ulithi Atoll, Yap Islands (western Carolines).
Trimma randalli, 16.0 mm SL male holotype, Garreru I., Palau, ROM 80040. Photo by R. Winterbottom
Martin F. Gomon: A new genus and miniature species of pipehorse (Syngnathidae) from Indonesia, pp. 25-30
A new genus and species of the gasterosteiform family Syngnathidae, Kyonemichthys rumengani, is described from a single 26.8 mm TL adult female collected in Lembeh Straits, Sulawesi, Indonesia. It is one of the smallest members of the family relative to body mass, and resembles the pipehorse genera Acentronura, Amphelikturus and Idiotropiscis in having a short head and snout angled slightly to the axis of the body, dermal appendages and flexible tail lacking a caudal fin. It differs from the three most notably in having fewer trunk rings (9, versus 11-15), more tail rings (51, versus 37-46), a posteriorly positioned dorsal fin originating on the eighth tail ring (versus usually originating on the trunk, but not posteriorly farther than the second tail ring) and a uniquely swollen trunk with a medial constriction.
Kyonemichthys rumengani n. sp., holotype, female, Lembeh Straits, Sulawesi, Indonesia, in life. Photo by W. Tan
Peter Wirtz: The return of the yellow grouper – annual migration and return to the same site by a xanthistic Mycteroperca fusca (Pisces: Serranidae), pp. 31-34
The homing behaviour of an individually recognizable Mycteroperca fusca has been observed in the field over a time span of 25 years. The animal leaves the bay of Garajau on the south coast of Madeira Island in spring and returns every year in autumn. This is the first long-term study showing that a fish returns to the same place annually, in a manner similar to migratory birds.
The normal colour pattern of Mycteroperca fusca. Photo taken in the bay of Garajau, Madeira Island by P. Wirtz
William F. Smith-Vaniz and Gerald R. Allen: Opistognathus rufilineatus, a new species of jawfish (Opistognathidae) from the Bird’s Head Peninsula, western New Guinea, pp. 35-42
A new species of Indo-West Pacific jawfish, Opistognathus rufilineatus, recently discovered at Triton Bay, Bird’s Head Peninsula, Indonesia (western New Guinea) is described. Two specimens were collected in April 2006 and color photographs and observations of other individuals were made in 2007 during biodiversity surveys conducted by Conservation International. One of at least 25 new species of fishes obtained from the area, the new jawfish is described here to help call attention to the special conservation significance of the Triton Bay type locality that is currently under consideration as a marine protected area. The new species is one of more than 20 undescribed Indo-Pacific jawfishes of the genus Opistognathus under study by the first author. It is distinguished from all other Opistognathus by having uniformly pigmented fins, sides of body with narrow red-brown stripes, outlining each yellow-tan lateral scale row, and cheeks with a few small scattered, dark, brown spots and narrow, short lines.
Opistognathus rufilineatus, same individual as in Fig. 3, Triton Bay, Bird’s Head Peninsula, western New Guinea. Photo by M. V. Erdmann