A Supplementary Description of Cypridina mariae and Rediagnosis of the Genus Cylindroleberis (Ostracoda: Myodocopa: Cylindroleberididae)

The ostracod family Cylindroleberididae is based on the genus Cylindroleberis Brady, 1868, and has a complicated nomenclatural history. The type species of Cylindroleberis is Cypridina mariae Baird, 1850. Baird described only the carapace, which had been considered lost. Thus, there was no reference point for the concept C. mariae or the genus Cylindroleberis. Baird's material has now been found in the Natural History Museum, London, U.K., and is illustrated here. To clarify the taxonomic status of C. mariae and Cylindroleberis, specimens were obtained from near the type locality, and a supplementary description is presented. This includes description of appendages, particularly the first antenna and mandible, which contain important diagnostic characters. This supplementary description provides important information about C. mariae, allowing a revision of the genus Cylindroleberis, and establishing a framework for future biological research on this ostracod group

Large expert-curated database for benchmarking document similarity detection in biomedical literature search

Document recommendation systems for locating relevant literature have mostly relied on methods developed a decade ago. This is largely due to the lack of a large offline gold-standard benchmark of relevant documents that cover a variety of research fields such that newly developed literature search techniques can be compared, improved and translated into practice. To overcome this bottleneck, we have established the RElevant LIterature SearcH consortium consisting of more than 1500 scientists from 84 countries, who have collectively annotated the relevance of over 180 000 PubMed-listed articles with regard to their respective seed (input) article/s. The majority of annotations were contributed by highly experienced, original authors of the seed articles. The collected data cover 76% of all unique PubMed Medical Subject Headings descriptors. No systematic biases were observed across different experience levels, research fields or time spent on annotations. More importantly, annotations of the same document pairs contributed by different scientists were highly concordant. We further show that the three representative baseline methods used to generate recommended articles for evaluation (Okapi Best Matching 25, Term Frequency-Inverse Document Frequency and PubMed Related Articles) had similar overall performances. Additionally, we found that these methods each tend to produce distinct collections of recommended articles, suggesting that a hybrid method may be required to completely capture all relevant articles. The established database server located at https://relishdb.ict.griffith.edu.au is freely available for the downloading of annotation data and the blind testing of new methods. We expect that this benchmark will be useful for stimulating the development of new powerful techniques for title and title/abstract-based search engines for relevant articles in biomedical research.Peer reviewe

Parasterope Kornicker 1975

<i>Parasterope</i> Kornicker, 1975 <p> <i>Parasterope</i> Poulsen, 1965: 361 [nomen nudum; without type species] <i>Parasterope</i> Kornicker, 1975: 401 [designated type species]</p> <p> Type species: <i>Asterope muelleri</i> Skogsberg, 1920 by original designation, Kornicker, 1975.</p> <p> Remarks.— Poulsen (1965) erected this genus for four existing species and seven new species but did not designate a type species. Kornicker (1975) designated the type species as <i>Asterope muelleri</i> Skogsberg, 1920 and in doing so validated the genus name. <i>Parasterope</i> is the largest genus in the family, with 39 species, including the new species described here. The genus is diagnosed by the unique combination of characters: first antenna s­seta with configuration 0+6, first antenna d­seta minute or absent, mandible e­seta present, mandible exopod length greater than 50 percent length of dorsal margin of endopod article 1. Specific differences are based on setal counts on appendages, nodes (protuberances) on appendages, presence or absence of lateral eye, and carapace size.</p>Published as part of <i>Syme, Anna E. & Poore, Gary C. B., 2006, Three new ostracod species from coastal Australian waters (Crustacea: Ostracoda: Myodocopa: Cylindroleberididae), pp. 51-67 in Zootaxa 1305</i> on page 52, DOI: <a href="http://zenodo.org/record/173718">10.5281/zenodo.173718</a&gt

Cylindroleberis Brady 1868

Cylindroleberis Brady, 1868 Asterope Philippi, 1840: 186 Cylindroleberis Brady, 1868: 127 [replacement name, Asterope preoccupied] Asteropina Strand, 1928 [unnecessary replacement name, Asterope preoccupied] Type species: Cypridina mariae Baird, 1850 by subsequent designation (Sylvester­Bradley, 1961). Remarks: The genus was rediagnosed in detail by Skogsberg (1920: 445) (as Asterope) and Poulsen (1965: 434) (as Asteropina). Including the new species described here, there are 13 species. The type specimen for C. mariae is lost; a neotype description and diagnosis is in preparation. The genus is diagnosed by the unique combination of characters: carapace elongate (height <50 percent of length), first antenna s­seta with proximal + distal filament configuration as 1 + 6, first antenna d­seta absent, mandible exopod less than 25 percent of length of first endopod article, mandible e­seta absent. Specific differences are based on the number of dorsal setae on the mandible basale, the number of setae at the proximal endite of the maxilla, the number of anteroventral setae on the sixth limb, and the number of furcal claws and setae.Published as part of Syme, Anna E. & Poore, Gary C. B., 2006, Three new ostracod species from coastal Australian waters (Crustacea: Ostracoda: Myodocopa: Cylindroleberididae), pp. 51-67 in Zootaxa 1305 on page 61, DOI: 10.5281/zenodo.17371

Diasterope wirraka Syme & Poore, 2006, new species

Diasterope wirraka new species Figures 3, 4 Material examined.— Holotype: NMV J 53210 one adult female on slide and in alcohol. Paratypes: NMV J 53211 one adult male on slide and in alcohol; NMV J 53212 one adult female on slide and in alcohol, NMV J 53213 one adult female on slides and in alcohol. Type Locality.—Eastern Bass Strait, Victoria, Australia. 15.3 km ESE of eastern edge of Lake Tyers. 37 ° 53.23 ' S, 148 ° 15.24 ' E, benthic, 43 m. Collected by N. Coleman using Smith­McIntyre grab. Collection date: 1 February 1991. Distribution.—Known only from type locality. Diagnosis.—Article 3 of first antenna with 5 dorsal setae; mandible basale with 3 (male) or 5 (female) dorsal setae; seventh limb with 12 setae. Description.—Adult female. NMV J 53210. Carapace oval and slightly broader posteriorly, inner end of incisur at valve midheight, posterior end evenly rounded, carapace length 1.64 mm, height 0.84 mm. Infold: rostrum with 60 setae anterior and dorsal to list, anteroventral infold with 20 setae between list and valve edge, narrow list continuing ventrally with about 40 setae on list, list broadening slightly at posterior infold with 21 broad triangular transparent setae and 23 smaller setae placed between. Selvage: fringe of hairs at inner end of ventral margin of incisur. Vestment: anterodorsal corner of vestment proximal to infold with clusters of long spines. First antenna: article 2 with 1 spinous dorsal seta and 1 lateral seta. Article 3 with 1 short ventral seta and 5 dorsal setae; first 2 with longer spines and remainder with short marginal spines. Article 4 with 1 dorsal seta with short marginal spines and 2–3 ventral setae. Article 5 with sensory seta with 1 short proximal and 6 terminal filaments. Article 6 with bare medial seta, 1.5 x length of a­claw. Article 7 with a­claw, b­seta with 4 marginal filaments, c­seta with 4 marginal filaments. Article 8 with minute peg d­seta, e­seta bare with blunt tip, f­seta bent dorsally with bifurcate tip, g­seta with 4 marginal filaments. Second antenna: protopod with bare distal medial seta. Endopod with 3 articles, end article with terminal filament. Exopod: article 2 seta with marginal spines, reaching ninth article. Articles 3–7 with long setae with marginal spines. Article 8 with basal spine and long seta with marginal spines. Article 9 with larger basal spine, 1 shorter seta and 2 long setae with marginal spines. Mandible: coxale endite missing. Basale endite with 4 spinous end setae, 3 triaenid setae with 5–6 paired spines excluding terminal pair, 2 dwarf setae of equal length and small glandular peg. Basale: ventral margin with 1 smaller triaenid seta with 2 pairs of spines excluding terminal pair, proximal to U­shaped boss; dorsal margin with 5 setae at midlength and 2 long terminal setae, equilength, with spines. No hairs/spines on medial side of basale. Exopod with hirsute tip and 2 subterminal setae, exopod length approximately 0.4 of dorsal margin of first endopod article. Endopod article 1 with 3 long ventral setae (1 with short spines, 2 with long spines). Endopod article 2: ventral margin with 3 long terminal setae with short spines, dorsal margin with stout a­, b­, c­, and d­setae, 2 slender seta proximal to a­seta; medial side with 9 cleaning setae, and 1 long g­seta distal to base of d­seta; lateral side with 1 long e­seta between b­ and c­ setae and 1 long f­seta between c­ and d­ setae. Endopod article 3 with stout dorsal claw, 4 stout spinous setae and 1 slender shorter spinous seta. Maxilla (fourth limb): epipod missing, endites folded and obscured. Basale spinous on medial side with 1 proximal seta at midheight. Ventral margin with 5 setae near midlength and 1 long spinous terminal seta. Dorsal margin with 2 proximal setae, 2 middle setae and 1 distal seta. Endopod article 1 with ventral spines, short alpha seta and long beta seta. Endopod article 2 with long terminal seta. Fifth limb: missing on holotype. For paratype NMV J 53212, comb with long exopod seta, 4 shorter lateral setae near ventral margin of comb. Sixth limb: anterior margin with seta at each endite suture, lateral flap of skirt with 4 setae, ventral margin with 14 setae with spines, posteroventral corner with 6 plumose setae. Seventh limb: with 12 setae, each with 3 bells. Combs forming obtuse angle, each comb with 8 teeth. Furca: each lamella with 7 claws and setae decreasing evenly in size, and 1 lateral seta pointing posteriorly. Bellonci organ with no obvious sutures. Medial eye with 3 pigmented sections. Lateral eye with 14 ommatidia. Lips: presence/absence unable to be determined. Posterior of body: thumb­like dorsal process with long spines at tip and shorter spines at mid­height. Reproductive organs: presence/absence unable to be determined. Gills: partly obscured and distorted by embryos in marsupium, but appear well­developed. Embryos: holotype with 6 embryos in marsupium; length of typical embryo 0.33 mm. Adult male. NMV J 53211. All features compared to adult female; important differences noted here: carapace length 1.50 mm, height 0.76 mm. First antenna: article 5 with sensory seta with robust stem and many filaments. Article 7 with c­seta broken from both antennae. Article 8 with f­seta with 8 marginal filaments and g­seta with 7 marginal filaments. F­seta not particularly long, approximately equal to length of first antenna. Second antenna: endopod with 3 articles. Article 2 with 4 setae, article 3 narrower than other articles, recurved, with 1 proximal seta. Mandible: basale dorsal margin with 3 setae at midlength, endopod article 2 with 3 dorsal proximal setae. Lateral eye: with 18 ommatidia. Reproductive organs: small oval with vas deferens leading to copulatory structure. Posterior of body: rounded posterior process. Remarks.— The existing diagnosis of Diasterope includes a mandible exopod length greater than 50 percent of length of dorsal margin of endopod article 1. Diasterope wirraka has a relative exopod length of only 40 %. However, the species fits more closely into Diasterope than into other genera and is thus included in this genus here. As noted above, a phylogenetic analysis is in progress and may alter the available genera of the Cylindroleberididae; thus, a formal change to the diagnostic features of Diasterope is not presented here. Diasterope wirraka is similar to D. grisea (Brady, 1898) (New Zealand) but differs in the following characters: carapace smaller (adult female 1.64 mm compared to 2.64 mm), article 3 of first antenna with 5 (not 6) dorsal setae; mandible basale of female with 5 (not 3) dorsal setae, male f­seta of first antenna of similar length to g­seta (not twice as long), and male carapace with no posterior row of hairs. D. wirraka is also similar to D. schmitti Kornicker, 1975 (Antarctica) in the number of dorsal setae on the mandible basale (5) but differs in the following characters: carapace much smaller (adult female 1.64 mm compared to 3.51 mm), article 3 of first antenna with 5 (not 6–7) dorsal setae, seventh limb with 12 (not 31) setae. No males are known for D. schmitti. D. wirraka c an be differentiated from D. procax Kornicker & Iliffe, 2000 (Bahamas), D. pilosa Poulsen, 1965 (Northeast Pacific) and D. bisetosa Poulsen, 1965 (Red Sea) by the number of dorsal setae on the mandible basale (5 compared to 1). Comparisons have not been made with those species for which only juvenile males are known, D. canina Poulsen, 1965 and D. tenuiseta Poulsen, 1965, both from the West Indies. The adult male carapace is lacking a posterior row of hairs. Presence of this row of hairs is common in males of the subfamily. The relatively short f­seta is in contrast to most known males of the subfamily, which have very long c­ and f­setae (twice length of first antenna). Species of Diasterope have a disjunct distribution, known from the Red Sea, northwest Atlantic, northeast Pacific and New Zealand to Antarctica. D. wirraka has morphological similarities with species from New Zealand and Antarctica, and its discovery extends the distribution of this genus to southeast Australia. Etymology.—“ Wirraka ” is an Australian aboriginal word from the Wemba Wemba language of southeastern Australia, meaning “to swim.”Published as part of Syme, Anna E. & Poore, Gary C. B., 2006, Three new ostracod species from coastal Australian waters (Crustacea: Ostracoda: Myodocopa: Cylindroleberididae), pp. 51-67 in Zootaxa 1305 on pages 56-60, DOI: 10.5281/zenodo.17371

A checklist of species of Cylindroleberididae (Crustacea: Ostracoda)

Volume: 9Start Page: 1End Page: 2

<i>Cylindroleberis mariae,</i> specimen number BMNH:1945.9.26.101-104.

<p>A, carapace of holotype; B-D, carapaces of additional material from Shetland Islands.</p

<i>Cylindroleberis mariae</i>, adult female, specimen number NMSZ 1996.004.293.

<p>A, furca, left lamella, l.v.; B, medial eye and Bellonci organ; C, lateral eye; D, upper and lower lips, dorsal view; E, posterior of body, left, l.v., reproductive organ dotted, eggs (or parasites) shown as circles; F, gills, right lamella, l.v. <i>Cylindroleberis mariae</i>, A-1 male NMSZ:1996.004.427; G, carapace outline, right, l.v., position of lateral eye dotted; H, first antenna, left, l.v.; I, second antenna endopod, left, m.v.</p