Volume 19, Issue 4 – 25 October 2013
Volume 19, Issue 4 – 25 October 2013
William F. Smith-Vaniz and Bruce B. Collette: Fishes of Bermuda, pp. 165-186
Here we add a recently described species of Hyporhamphus (Hemiramphidae), recognize Chromis bermudae (Pomacentridae) as valid, and remove Parasphyraenops atrimanus (Serranidae) from the list of Bermuda endemics, changing the total number of Bermuda endemic fishes to seven species, eight if Clepticus sp. (Labridae) proves to be new, excluding from consideration several land-locked species of Fundulus. First Bermuda records are documented for 24 species but five others, Carcharodon carcharias, Hyporhamphus unifasciatus, Rypticus subbifrenatus Clepticus parrae and Eleotris pisonis, based on misidentifications, are removed. Biological or distributional notes are included for 22 species and nomenclatural changes apply to another 12 species. Reproductions of recently discovered historical watercolors or pencil sketches by Colonel H. W. Drummond-Hay are provided for 14 species of Bermuda fishes.
Holocentrus rufus, Longspine Squirrelfish, Drummond-Hay no. 41, “Squirrel fish,” natural size, original drawing about 163 mm TL, Bermuda, 21 October 1847. Courtesy of Smithsonian Institution, no. P12956.
F. B. M. Vermeulen, S. Valdesalici and J. R. Garcia-Gil: Rivulus tomasi (Teleostei: Cyprinodontiformes: Rivulidae), a new killifish from Tobogán de la Selva, middle Orinoco river drainage in the Amazonas Territory, southwest Venezuela, pp. 187-192
Rivulus tomasi is described from Tobogán da la Selva, a tributary of the middle Rio Orinoco south of Puerto Ayacucho in the Amazonas Territories, southwest Venezuela. It is similar to R. amanapira, R. rectocaudatus, R. tecminae and R. staecki in having a truncate caudal fin, but differs by a unique combination of character states: tip of pelvic fin reaching between base of 4th and 5th anal fin ray in males, and 39-42 scales in longitudinal series. Rivulus tomasi differs from other Rivulus spp. (except R. amanapira and R. uakti) by unique caudal fin coloration.
Rivulus tomasi n. sp. male, from Tobogán de la Selva, Amazonas Territories, Venezuela. Photo by F. Guerreiro.
Gerald R. Allen, Mark V. Erdmann and Ni Luh Astria Yusmalinda: Paracheilinus rennyae, a new species of flasherwrasse (Perciformes: Labridae) from southern Indonesia, pp. 193-206
The Indo-Pacific labrid fish Paracheilinus rennyae is described from four male specimens, 52.2-60.4 mm SL, collected in 15-21 m depth off southwestern Flores Island in the Lesser Sunda island chain of Indonesia. It is distinguished from most congeners by the lack of filamentous extensions of the dorsal fin rays in males and a rounded caudal fin margin, a combination of features shared only by P. octotaenia (Red Sea). It differs from the Red Sea species in having 13-14 rakers (vs. 16-18) on the first gill arch and several colour pattern differences. Genetic analysis (CO1) indicates it is closely related to P. angulatus from the Philippines and northern Borneo (Brunei, Sabah, and Kalimantan), but the two species exhibit marked differences in the shape of the median fins.
Underwater photograph of live Paracheilinus rennyae, male holotype, 58.4 mm SL, southwestern Flores, Indonesia. Photo by G. R. Allen.
Hans Recknagel, Henrik Kusche, Kathryn R. Elmer and Axel Meyer: Two new endemic species in the Midas cichlid species complex from Nicaraguan crater lakes: Amphilophus tolteca and Amphilophus viridis (Perciformes, Cichlidae), pp. 207-224
The Neotropical Midas cichlid species complex (Amphilophus citrinellus Günther 1864) has become a model system for investigating the mechanisms of speciation and adaptive radiation. In several instances ancestral Midas cichlids from the great Nicaraguan lakes have colonized nearby crater lakes where they continued to evolve in isolation. Each crater lake can be seen as a “natural experiment” of sympatric and allopatric divergence. Several ecologically and genetically well-differentiated crater lake species have already been identified, but the species complex is not fully taxonomically resolved. Here, two new endemic Nicaraguan crater lake cichlids species are described: Amphilophus tolteca n. sp., a slender-bodied species which is endemic to the ca. 1,245 year old Lake Asososca Managua and Amphilophus viridis n. sp., an endemic benthic species from Lake Xiloá. Amphilophus tolteca morphologically resembles previously described limnetic species from the crater lakes Apoyo and Xiloá with a depressed, elongated body. However, A. tolteca is geographically isolated and genetically distinct from those species and from the putative generalist ancestral species. Amphilophus viridis resembles the Xiloá species A. amarillo in terms of body shape, but is distinct in coloration and ecology, and is genetically differentiated from all other syntopic species.
Lateral view of A. tolteca, holotype, BMNH 2012.9.2.1, Lake Asososca Managua, Nicaragua. Photo by H. Kusche.
Hamid Reza Esmaeili, Ali Gholamifard, Golnaz Sayyadzadeh, Benafsheh Parsi, Soror Mirghiasi and Somayeh Ghasemian: New record of the convict cichlid, Amatitlania nigrofasciata (Günther, 1867), from the Middle East (Actinopterygii: Cichlidae), pp. 225-229
This paper reports the first record of a population of the Neotropical convict cichlid, Amatitlania nigrofasciata (Günther, 1867) from Iran, the second record of this species from the Middle East and the only known extant wild population in the region. This new record is based on collection of eight specimens of a leucistic strain of A. nigrofasciata taken from Golabi Spring, a fresh warmwater site in the Kol River (Hormuzgan basin). Source of the population is most likely due to releases by local people. Specimens captured included small and large individuals, indicating possible establishment.
Amatitlania nigrofasciata collected from Golabi Spring at headwaters of Kol River, Hormuz Basin, Iran. Photo by H. R. Esmaeili.