ABSTRACT
Three species of Labidocera from Indonesian waters are herein redescribed based on topotypic material. Labidocera bataviae Scott, 1909, L. madurae Scott, 1909, and L. pavo Giesbrecht, 1889 are superficially similar in morphology that may easily be mistaken for each other. L. madurae is characterized by a moderately large and asymmetrical Ur1, with the middle of the right and the left sides considerably inflated; the CR almost symmetrical, the Ri's of P5 asymmetrical, right side is longer, conically shaped and with tapered end, while the left side is short with rounded apex; Re armed with 3 unequal St in female. The male is characterized by the chela of the right P5 with stout and distally curved thumb, outer margin between thumb and distal end of Re1 naked, and the Re2 of the left P5 elongated, oval-shaped, and twice as long as wide: with 1 outer spine and 3 unequal terminal processes. Labidocera bataviae female is distinguishable by a moderately large and asymmetrical Ur1, with the right and left margins each armed with one knob-like process, and by the form of P5; the male by the bifurcated thumb of chela of the right P5. L. pavo female is distinguishable by having two large conical lobes on Ur1, and the form of P5; the male by the short thumb of chela of the right P5.
ABSTRACT
The giant isopod genus Bathynomus A. Milne-Edwards, 1879, is recorded for the first time in Indonesian waters, from deep waters off southern Java in the Indian Ocean. Bathynomus raksasa sp. nov. is described and notes on juvenile specimens of an unidentified species found in the same locality are also provided. Bathynomus raksasa sp. nov. is characterized by the large size (averaging at 330 mm), narrowly rounded clypeus apex, prominent longitudinal carina on the clypeus, convex lateral margins of the uropodal exopod and endopod, produced distolateral corners of the uropodal exopod and endopod which have acute ends, an uropodal exopod with a setal fringe of medium length (69%), a pleotelson 1.6 times wider than long with the posterior margin medially concave, and the large number (11-13) of spines on the pleotelson.
ABSTRACT
Two new species of Metacirolana from coral reefs in Indonesia are described and Metacirolana spinosa (Bruce, 1980) is recorded for the first time in Indonesia. Metacirolana lombok sp. nov. and Metacirolana mioskon sp. nov. show similarities with several other species of Metacirolana forming a species group within the genus, characterized by small body size (2.0-3.5 mm), smooth body surfaces, weakly produced rostrum, lack of dorsal carinae and abundant chromatophores.
Subject(s)
Isopoda , Animal Distribution , Animal Structures , Animals , Body Size , Coral Reefs , Indonesia , Organ SizeABSTRACT
Cirolana bambang sp. nov. from Bitung, North Sulawesi, Indonesia is described. The species can be recognised by generally smooth body with small, acute, submedian nodules on pleonites 4-5 and the anterior dorsal surface of the pleotelson together with a flat, pentagonal frontal lamina, linguiform and sexually dimorphic pleotelson with the dorsal surface covered by short setae in males, deeply bifid uropod apices, and a conspicuously large robust seta on the superodistal angle of pereopod 1 ischium. Cirolana bambang sp. nov. appears to belong to a group of Indo-West Pacific Cirolana with prominent penial process, a large robust seta on the superodistal angle of pereopod 1 ischium and the presence of setae on dorsal surface of pleotelson and or uropod in males. The most similar species are Cirolana comata Keable, 2001; Cirolana dissimilis Keable, 2001; Cirolana aldabrensis Schotte Kensley, 2005; and Cirolana somalia Schotte Kensley, 2005. Cirolana kiliani Müller, 1993 and C. somalia are found not to belong to the Cirolana'parva-group'.
Subject(s)
Isopoda , Animal Structures , Animals , Body Size , Indonesia , Male , Organ Size , SomaliaABSTRACT
Three species of Cirolanidae described by Nierstrasz in 1931 are redescribed from the type material: Cirolana indica Nierstrasz, 1931, with new material from Singapore and Lombok Island, Indonesia; C. vanhoeffeni Nierstrasz, 1931; and C. stebbingi Nierstrasz, 1931, which is here transferred to the genus Politolana Bruce, 1981 based on the elongate body, long peduncle of pleopod 1, narrow and slender frontal lamina, flat and robust carpus of pereopod 7, long and acute robust setae on merus-propodus pereopod 1, secondary unguis on dactylus, and antenna peduncle articles 1-2 shorter than the subequal articles 3-5.
Subject(s)
Isopoda/classification , Animal Distribution , Animal Structures/anatomy & histology , Animal Structures/growth & development , Animals , Body Size , Female , Indonesia , Isopoda/anatomy & histology , Isopoda/growth & development , Male , Organ Size , SingaporeABSTRACT
The genus Odysseylana Malyutina, 1995 is revised and a new diagnosis presented; two new species from Singapore are described: Odysseylana sakijang sp. nov. and Odysseylana temasek sp. nov. The monotypic genus Parilcirolana Yu & Li, 2001, is placed in synonymy, bringing total number of species in Odysseylana to four including the type species Odysseylana sirenkoi Malyutina, 1995 and Odysseylana setosa (Yu & Li, 2001) comb. nov. The genus is known only from coastal waters from Singapore to off Macau, western Pacific. The principal distinguishing character of Odysseylana are an elongate body shape (2.9-3.5 long as greatest width), head without a rostral point, pentagonal and flat frontal lamina; antenna peduncle articles 1-3 short, 4 and 5 subequal in length and longest; and pleopod 1 peduncle quadrate, and a slender pleopod 1 endopod.
