Redescription of three cirolanid isopods (Crustacea: Peracarida) from Indonesia

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

Revision of the cirolanid isopod genus Odysseylana Malyutina, 1995 (Crustacea) with description of two new species from Singapore

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

Influence of apical oxygen on the extent of in-plane exchange interaction in cuprate superconductors

In high Tc superconductors the magnetic and electronic properties are determined by the probability that valence electrons virtually jump from site to site in the CuO2 planes, a mechanism opposed by on-site Coulomb repulsion and favored by hopping integrals. The spatial extent of the latter is related to transport properties, including superconductivity, and to the dispersion relation of spin excitations (magnons). Here, for three antiferromagnetic parent compounds (single-layer Bi2Sr0.99La1.1CuO6+delta, double-layer Nd1.2Ba1.8Cu3O6 and infinite-layer CaCuO2) differing by the number of apical atoms, we compare the magnetic spectra measured by resonant inelastic x-ray scattering over a significant portion of the reciprocal space and with unprecedented accuracy. We observe that the absence of apical oxygens increases the in-plane hopping range and, in CaCuO2, it leads to a genuine 3D exchange-bond network. These results establish a corresponding relation between the exchange interactions and the crystal structure, and provide fresh insight into the materials dependence of the superconducting transition temperature.Comment: 9 pages, 4 figures, 1 Table, 42 reference

Review of the Cirolana 'pleonastica-group' (Crustacea: Isopoda: Cirolanidae) with description of four new species from the Indo- Malaysian region

Sidabalok, Conni M., Bruce, Niel L. (2018): Review of the Cirolana 'pleonastica-group' (Crustacea: Isopoda: Cirolanidae) with description of four new species from the Indo- Malaysian region. Raffles Bulletin of Zoology 66: 177-207, DOI: http://doi.org/10.5281/zenodo.535856

Odysseylana

Key to the species of <i>Odysseylana</i> <p>1. Body length more than 3 times greatest width, uropod exopod longer than endopod....................... 2</p> <p>– Body length less than 3 times greatest width, uropod exopod shorter than endopod........................ 3</p> <p> 2. Pleotelson posterior margin medially indented, with dorsal plumose setae.............. <i>Odysseylana sirenkoi</i></p> <p> – Pleotelson posterior margin not medially indented, with smooth dorsal surface........... <i>O. temasek</i> <b>sp. nov.</b></p> <p> 3. Uropod peduncle with lateral setae, pleonites 4–5 and pleotelson with dorsal tubercles..... <i>O. sakijang</i> <b>sp. nov.</b></p> <p> – Uropod peduncle without lateral setae, pleonites 4–5 and pleotelson dorsally smooth.............. <i>O. setosa</i></p>Published as part of <i>Sidabalok, Conni M. & Bruce, Niel L., 2015, Revision of the cirolanid isopod genus Odysseylana Malyutina, 1995 (Crustacea) with description of two new species from Singapore, pp. 351-367 in Zootaxa 4021 (2)</i> on page 355, DOI: 10.11646/zootaxa.4021.2.6, <a href="http://zenodo.org/record/243704">http://zenodo.org/record/243704</a&gt

Cirolana Leach 1818

Genus <i>Cirolana</i> Leach, 1818 <p> <b>Remarks.</b> See Bruce (1986), Brusca <i>et al</i>. (1995) for synonymy and diagnoses. For recent accounts of <i>Cirolana</i> and also Cirolanidae in the Indo-Malaysian region see Bruce & Wong (2015), Sidabalok (2013), Rodcharoen <i>et al.</i> (2014, 2016, 2017), Sidabalok & Bruce (2015, 2016, 2017, 2018).</p>Published as part of <i>Sidabalok, Conni M. & Bruce, Niel L., 2018, Cirolana bambang, a distinctive new species of Cirolana Leach, 1818 (Crustacea: Isopoda: Cirolanidae) from Bitung, Indonesia, pp. 441-450 in Zootaxa 4375 (3)</i> on page 442, DOI: 10.11646/zootaxa.4375.3.10, <a href="http://zenodo.org/record/1158922">http://zenodo.org/record/1158922</a&gt

Pengaruh musim terhadap keragaman dan kelimpahan kopepoda (krustasea) di perairan mangrove estuari T. N. Ujung Kulon Banten

An observation on Copepoda diversity and abundance in three mangrove estuaries in Ujung Kulon National Park, Banten was carried out in June and November 2008. The objective of this observation was to investigate the relationship between diversity and abundance of copepods with some environmental factors which affected the distribution in dry and rainy seasons. A total of 28 species from 17 genera and 14 families of copepods were recorded. The highest density of the copepod community was recorded in June (dry season) while the lowest density was in November (rainy season). The diversity, abundance and distribution of copepods were found to be different in the three sites

FIGURE 6 in Revision of the cirolanid isopod genus Odysseylana Malyutina, 1995 (Crustacea) with description of two new species from Singapore

FIGURE 6. Odysseylana temasek sp. nov., holotype (8.6 mm) (A – C); paratype (9.6 mm) (D – G): A, dorsal view; B, lateral view; C, frons; D, antennula; E, pleotelson and uropods; F, antenna; G, sternite 7 showing penial openings

Cirolana vanhoeffeni Nierstrasz 1931

<i>Cirolana vanhoeffeni</i> Nierstrasz, 1931 <p>(Fig. 6)</p> <p> <i>Cirolana vanhöffeni</i> Nierstrasz, 1931: 153, figs 16–23.</p> <p> <i>Cirolana vanhoeffeni</i>.— Bruce, 1986: 200.</p> <p> <i>Cirolana vanhoffeni</i>.— Brusca, Wetzer & France, 1995: 18.</p> <p> Not <i>Cirolana vanhöffeni</i>.—Nierstrasz, 1931, figs 26–29 [= <i>Politolana stebbingi</i> (Nierstrasz, 1931), present study].</p> <p> <b>Material examined.</b> <i>Holotype</i> ♂ (10.0 mm), Siboga Expedition, 1°58.5'N, 125°0.5'E, station 122, 1155– 1264 m, 17 June 1899 (ZMA. CRUS.I. 100606).</p> <p> <b>Supplementary description (male).</b> <i>Body</i> 3.5 times as long as greatest width, dorsal surfaces smooth, widest at pereonite 4, lateral margins subparallel. <i>Rostral point</i> absent. <i>Pereonite 1 and coxae</i> 2–3 each with posteroventral angle rounded; coxae 5–7 with entire oblique carina; posterior margins of pereonites 5–7 smooth. <i>Pleon</i> with pleonite 1 visible in dorsal view; pleonites 3–5 posterior margin smooth; posterolateral angles of pleonite 2 rounded, not posteriorly produced; pleonite 3 with posterolateral margins not extending to posterior margin of pleonite 5, acute; posterolateral margin of pleonite 4 rounded, clearly extending beyond posterior margin of pleonite 5. <i>Pleotelson</i> 1.4 times as long as anterior width, dorsal surface without longitudinal carina; lateral margins straight, margins smooth, posterior margin subtruncate, without median point, with 8 RS.</p> <p> <i>Antennula</i> peduncle articles 1 and 2 not fused, article 3 being longest, flagellum extending to posterior margin of eye. <i>Antenna</i> peduncle articles 1–3 shortest, articles 4 and 5 are subequal in length, flagellum extending to posterior of pereonite 2.</p> <p> <i>Frontal lamina</i> pentagonal, longer than greatest width, lateral margins straight, diverging slightly towards anterior, anterior margin rounded, without small median point.</p> <p> <i>Penes</i> low tubercles.</p> <p> <i>Uropod</i> rami not extending beyond pleotelson, marginal setae in single tier, apices broadly rounded. <i>Endopod</i> apically not bifid; lateral margin straight; mesial margin strongly convex. <i>Exopod</i> not extending to end of endopod, apically not bifid; lateral margin straight; mesial margin convex.</p> <p> <b>Female.</b> No female specimens available.</p> <p> <b>Distribution.</b> Known only from the type locality.</p> <p> <b>Remarks.</b> <i>Cirolana vanhoeffeni</i> superficially resembles <i>Cirolana lata</i> Haswell, 1882 in lacking eyes, but differs by having a more elongate body, the presence of fine tubercles on the lateral margins of pleonites 2–3, pleonite 4 with a rounded posterolateral margin, pleonite 3 with a less extended posterolateral margin and a pentagonal frontal lamina. <i>Cirolana vanhoeffeni</i> accords with the generic diagnoses for <i>Cirolana</i>, including the lack of a process on the ischium and merus of the inferodistal margin pereopod 1, unflattened pereopod 7, the morphology of antennula and antenna peduncles, low tubercle-like penes and basal attachment of the appendix masculina. The rounded posterolateral margin of pleonite 4 and the weakly extended posterolateral margin of pleonite 3 (not reaching end of pleonite 5) indicates a possible affinity of <i>Cirolana vanhoeffeni</i> to the ‘ <i>Cirolana</i> tuberculate group’, but another distinguishing character for that group, the arrangement of robust setae on the lateral margin of exopod, cannot be determined as all the robust setae are missing and the margins of the rami heavily rubbed. The pleopods and mouthparts are not described as they had been previously dissected from the holotype and were not with the specimen.</p>Published as part of <i>Sidabalok, Conni M. & Bruce, Niel L., 2016, Redescription of three cirolanid isopods (Crustacea: Peracarida) from Indonesia, pp. 277-290 in Zootaxa 4114 (3)</i> on page 285, DOI: 10.11646/zootaxa.4114.3.4, <a href="http://zenodo.org/record/271597">http://zenodo.org/record/271597</a&gt

Politolana Bruce 1981

Genus <i>Politolana</i> Bruce, 1981 <p> <i>Politolana</i> Bruce 1981: 958.— Wetzer, Delaney & Brusca 1987: 1.— Kensley & Schotte, 1989: 140.— Riseman & Brusca 2002: 57.— Frutos & Sorbe, 2010: 20.</p> <p> Type species. <i>Aega polita</i> Stimpson, 1853; by original designation (Bruce 1981).</p> <p> <b>Remarks</b>. <i>Politolana</i> Bruce, 1981 was established to accommodate six species formerly placed in <i>Cirolana</i>. Riseman & Brusca (2002) described a further two species when revising the genus together with a phylogenetic analysis, concluding that <i>Politolana</i> is paraphyletic and suggested that three species be removed from the genus as they lacked the synapomorphies for <i>Politolana</i> s. str., these being <i>Politolana crosnieri</i> Bruce, 1996, <i>Politolana dasyprion</i> Bruce, 1991 and <i>Politolana obtusispina</i> (Kensley, 1975); these three species were regarded as <i>incertae sedis</i> within the genus <i>sensu lato</i>. The genus now has 14 species (Schotte <i>et al.</i> 2008 onwards) including <i>Politolana stebbingi</i> (Nierstrasz, 1931) <b>comb. nov.</b> The known species distribution is largely antitropical, i.e. Atlantic, Gulf of Mexico, Gulf of California, south Pacific and South Africa (Riseman & Brusca 2002), however <i>Politolona stebbingi</i> expands the range into the equatorial central Indo-West Pacific region.</p> <p> <i>Politolana</i> is distinguished from other cirolanid genera by the elongate body (2–3 times as long as greatest width), narrow and slender frontal lamina, small eyes, antenna peduncle articles 1–2 the shortest and articles 3–5 subequal in length, ischium-merus of pereopod 1 anterodistally produced, pleopod 1 peduncle subquadrate, and the apomorphic characters—lateral margins of pleonites 2–4 with a ventral fringe of setae, produced posterolateral margin on the posterior of pleonites 1–4 or on 1 and 4 only and the absence of carina on the coxae of pereonite 7 (Riseman & Brusca 2002).</p>Published as part of <i>Sidabalok, Conni M. & Bruce, Niel L., 2016, Redescription of three cirolanid isopods (Crustacea: Peracarida) from Indonesia, pp. 277-290 in Zootaxa 4114 (3)</i> on pages 285-286, DOI: 10.11646/zootaxa.4114.3.4, <a href="http://zenodo.org/record/271597">http://zenodo.org/record/271597</a&gt