scholarly journals Eucyclops delongi sp. nov. (Cyclopiformes: Copepoda: Crustacea) from the River Lena delta, Polar Eastern Siberia, Russia

2019 ◽  
Vol 323 (4) ◽  
pp. 575-580
Author(s):  
V.R. Alekseev ◽  
E.N. Abramova ◽  
O.A. Chaban
Keyword(s):  
New Species ◽  
Distal Segment ◽  
Width Ratio ◽  
Posterior Surface ◽  
Eastern Siberia ◽  
North East ◽  
Distal Side ◽  
Length Width ◽  
Caudal Rami ◽  
Lena Delta

A new species of Eucyclops (Cyclopiformes: Copepoda: Crustacea) is described from a bog-lake on the top of a hill near Titary fisherman village in the top of The River Lena delta, Eastern Siberia, Russia. Eucyclops delongi sp. nov. belongs to the speratus group of species and can be clearly separated from other related species by a combination of characters that include smooth hyaline membrane on 3 distal segments of antennule, missing of long hairs on antenna basipodite posterior surface (on the top), presence of several long setules on the distal side of the caudal rami (saw), homogeneous hair row on both sides of inner coxal spine in 4th swimming legs, relatively short caudal rami (length/width ratio less than five), clearly seen difference in caudal saw denticles on lateral edge, very long innermost caudal seta subequal to ramus length, inner spine of distal segment of endopodite 4th swimming leg 1.1 times as long as segment itself. Male of new species can also be separated from other species by a combination of the following characters: antenna basipodite on posterior surface without groups of long hairs (on the top), coxal spine of 4th swimming legs homogenously covered with long hairs, rudimental 5th legs with relatively short inner spine similar in length to segment itself, rudimental 6th legs with 3 appendages including strong inner spine reaching the middle of the next segment, outer seta as long as spine, middle seta is shorter than spine. This species is suggested to be an endemic of Arctic zone in Eastern Siberia (Beringia), which is well known as a Pleistocene refuge during glaciation in North-East Asia.

A new stygobiotic species of Diacyclops Kiefer, 1927 (Copepoda, Cyclopidae) from caves in New Mexico, United States

Crustaceana ◽  
2013 ◽  
Vol 86 (9) ◽  
pp. 1155-1177
Author(s):  
Eduardo Suárez-Morales ◽  
Nancy F. Mercado-Salas ◽  
Rachel Barlow
Keyword(s):  
New Species ◽  
New Mexico ◽  
Local Population ◽  
Dorsal Surface ◽  
Width Ratio ◽  
Cave System ◽  
Length Width ◽  
Caudal Rami ◽  
A New Species ◽  
Group 1

A new species of the freshwater cyclopine copepod genus Diacyclops is described from a North American cave system in SE New Mexico, U.S.A. The new species, D. nikolasarburni n. sp., differs from its congeners by its having of a unique combination of characters including: 17-segmented antennules, three-segmented rami in legs 1-4, a basic 2333 spinal formula with a highly variable pattern, naked inner margin of caudal rami, but dorsal surface with spinules, subequal terminal spines of leg 4 endopod, and inner spine of fifth leg about as long as bearing segment. This species has also a variable length/width ratio of the caudal ramus (4.6-6.0, average 5.0); the lateral caudal seta is inserted on the distal one-quarter of ramus. The 2333 spinal formula was dominant (55%) in the population but other patterns were also present. The new species belongs to Group 1 species of Diacyclops (sensu Reid & Strayer, 1994). The local population of this stygobiotic species probably resulted from radiation-stranding processes of epigean forms of widely distributed Diacyclops and is probably endemic to this cave system.

scholarly journals Calathea gentryi and C. yawankama (Marantaceae), new species endemic to Amazonian Peru

2018 ◽  
Vol 12 (1) ◽  
pp. 121-127
Author(s):  
Helen Kennedy
Keyword(s):  
New Species ◽  
Type Locality ◽  
Width Ratio ◽  
Green Band ◽  
Inflorescence Morphology ◽  
Length Width ◽  
Light Green

Calathea gentryi H. Kenn., and C. yawankama H. Kenn., both endemic to Amazonian Peru, are described as new. Calathea gentryi occurs in Department Loreto in both Maynas and Alto Amazonas Provinces. Calathea gentryi is characterized by all basal leaves, a single, relatively small (4.5–7 × 1–2.5 cm) narrowly ellipsoid to subcylindric inflorescence of 12 to 19 spirally arranged small (1.1–1.5 × 0.9–1.2 cm) bracts, and three bracteoles per flower pair, two lateral, membranous, and a medial, claviculate, one. Calathea gentryi shares a similar habit and inflorescence morphology with C. barbata Peters. and C. schunkei H. Kenn. Calathea yawankama, known only from the type locality in Department Amazonas, is characterized by the relatively broad (length: width ratio 1.15–2.23:1), all basal leaves, leaves with the blades patterned with a light green band along the midrib adaxially, purple abaxially, and small (2–2.5 × 2–2.7 cm), globose, inflorescence of 12 to18 spirally arranged bracts, the presence of claviculate bracteoles and white flowers. Calathea yawankama shares a similar inflorescence morphology with C. compacta S. Suárez & Galeano and C. pearcei Rusby.

scholarly journals The Ediacaran frondose fossil Arborea from the Shibantan limestone of South China

2020 ◽  
Vol 94 (6) ◽  
pp. 1034-1050 ◽  
Author(s):  
Xiaopeng Wang ◽  
Ke Pang ◽  
Zhe Chen ◽  
Bin Wan ◽  
Shuhai Xiao ◽  
...  
Keyword(s):  
New Species ◽  
South China ◽  
Type Species ◽  
Microbial Mats ◽  
Width Ratio ◽  
General Morphology ◽  
Dengying Formation ◽  
Length Width

AbstractBituminous limestone of the Ediacaran Shibantan Member of the Dengying Formation (551–539 Ma) in the Yangtze Gorges area contains a rare carbonate-hosted Ediacara-type macrofossil assemblage. This assemblage is dominated by the tubular fossil Wutubus Chen et al., 2014 and discoidal fossils, e.g., Hiemalora Fedonkin, 1982 and Aspidella Billings, 1872, but frondose organisms such as Charnia Ford, 1958, Rangea Gürich, 1929, and Arborea Glaessner and Wade, 1966 are also present. Herein, we report four species of Arborea from the Shibantan assemblage, including the type species Arborea arborea (Glaessner in Glaessner and Daily, 1959) Glaessner and Wade, 1966, Arborea denticulata new species, and two unnamed species, Arborea sp. A and Arborea sp. B. Arborea arborea is the most abundant frond in the Shibantan assemblage. Arborea denticulata n. sp. resembles Arborea arborea in general morphology but differs in its fewer primary branches and lower length/width ratio of primary branches. Arborea sp. A and Arborea sp. B are fronds with a Hiemalora-type basal attachment. Sealing by microbial mats and authigenic cementation may have played an important role in the preservation of Arborea in the Shibantan assemblage. The Shibantan material of Arborea extends the stratigraphic, ecological, and taphonomic ranges of this genus.UUID: http://zoobank.org/554f21da-5f09-4891-9deb-cbc00c41e5f1

scholarly journals A new species of Amblyseius Berlese (Acari: Phytoseiidae) from Brazil

Zootaxa ◽  
2007 ◽  
Vol 1445 (1) ◽  
pp. 65-68 ◽  
Author(s):  
PETERSON R. DEMITE ◽  
ANTONIO C. LOFEGO ◽  
REINALDO J.F. FERES
Keyword(s):  
New Species ◽  
Deciduous Forest ◽  
Neotropical Region ◽  
Species Group ◽  
Southeastern Brazil ◽  
Width Ratio ◽  
Phytoseiid Mites ◽  
Protected Natural Area ◽  
Length Width ◽  
A New Species

Phytoseiid mites have received considerable world wide attention because of their potential as natural enemies of phytophagous mites (McMurtry, 1984). The Amblyseius obtusus group Chant  is the largest species group in the genus Amblyseius. Chant & McMurtry (2004) divided the group into seven subgroups based on spermathecal morphology. The andersoni subgroup of Chant & McMurtry, 2004 is characterized by a spermatheca with the calyx dish-, cup-, bell-, or V-shaped, with the length/width ratio at the mid-point of the calyx < 3:1. A total of 24 species of the andersoni subgroup are known from the Neotropical region, 13 of these from Brazil (Moraes et al., 2004). A new species of this subgroup, Amblyseius paulofariensis sp. nov., is described and illustrated in this paper, from specimens collected in the semi-deciduous forest area of “Estação Ecológica de Paulo de Faria”, a protected natural area in the State of São Paulo, southeastern Brazil, on three species of Euphorbiaceae: Acalypha diversifolia Jacq., Actinostemon communis (Müll. Arg.) and Alchornea glandulosa Poepp. & Endl.. In the region where this mites was found, the climate is of the type Cwa-Aw of Köppen, with two distinct seasons: one wet, from October to March, and the other dry, from April to September. The annual mean temperature is 25°C, with a maximum mean of 30°C and a minimum mean of 20°C (Barcha & Arid, 1971; Arid & Barcha, 1973).

A new species of Helmutkunzia Wells & Rao, 1976 from an intertidal sandy beach in Xiamen, China and proposal of Pseudobalucopsylla gen. nov. (Copepoda, Harpacticoida, Miraciidae)

Zootaxa ◽  
2021 ◽  
Vol 5051 (1) ◽  
pp. 487-505
Author(s):  
FANGHONG MU ◽  
RONY HUYS
Keyword(s):  
New Species ◽  
Sandy Beach ◽  
Relative Length ◽  
Width Ratio ◽  
Sexually Dimorphic ◽  
Nicobar Island ◽  
Galapagos Archipelago ◽  
The Pacific ◽  
Length Width ◽  
A New Species

A new species of the genus Helmutkunzia Wells & Rao, 1976 (Miraciidae) is described from specimens collected from an intertidal sandy beach in Xiamen, Fujian Province, China. Helmutkunzia xiamenensis sp. nov. differs from its two congeners by the length/width ratio of the female P5 exopod, the number or length of the setae on the sexually dimorphic P2 endopod in the male and the relative length of the spines on the endopodal lobe of the male P5. The Chinese species is morphologically closest to H. variabilis Wells & Rao, 1987 from the Andaman and Nicobar island chain. Females of both species can readily be differentiated by the relative length of the P5 exopod while males can be differentiated by the length of the armature elements on P2 enp-2 and the endopodal lobe of P5. The genus Balucopsylla Rao, 1972 is reviewed, resulting in the proposal of Pseudobalucopsylla gen. nov. to accommodate the type species Balucopsylla triarticulata Wells & Rao, 1987 and three new Indo-Pacific species previously identified with it: P. obscura sp. nov. from the Andaman Islands, P. costaricensis sp. nov. from the Pacific coast of Costa Rica and P. mielkei sp. nov. from the Galápagos archipelago. A key to species of Pseudobalucopsylla sp. nov. is provided.  

A new species of Boholina (Copepoda, Calanoida, Boholinidae) from Ganghwa Island in western Korea

2013 ◽  
Vol 94 (3) ◽  
pp. 537-545 ◽  
Author(s):  
Seong Yong Moon ◽  
Ho Young Soh
Keyword(s):  
New Species ◽  
Endopodal Segment ◽  
Width Ratio ◽  
Spine Length ◽  
North West ◽  
The North ◽  
Length Width ◽  
Distal Spine ◽  
The Right ◽  
A New Species

A new species of Boholina, B. ganghwaensis sp. nov. is described, based on specimens collected from burrows of the manicure crab, Cleistostoma dilatatum, in the tidal flat of Ganghwa Island in western Korea. The new species is closely similar to B. purgata and B. parapurgata by having a pointed process on the posterior angles of the second and third pedigerous somites and a similar rostrum in the female, but can be distinguished from its congeners by the following characters: in females by the genital double-somite with small hook-like process on each gonoporal plate, the setation of the distal endopodal segment of mandible, the basis and first endopodal segment of the maxillule incompletely separated, the inner distal spine/outer terminal spine length ratio on P5; and in males by the distal spine present on the posterior surface of the basis of both P5 and the length/width ratio of the endopod of the right P5. This is the first Bololina species recorded from the north-west Pacific.

scholarly journals A new species of Schizopera (Copepoda: Harpacticoida: Miraciidae) from Colombia

2014 ◽  
pp. 4199-4213 ◽  
Author(s):  
Juan M Fuentes-Reinés ◽  
Samuel Gómez
Keyword(s):  
New Species ◽  
Water Samples ◽  
Relative Length ◽  
Length Ratio ◽  
Width Ratio ◽  
Present Contribution ◽  
Length Width ◽  
A New Species

ABSTRACTObjective. The present contribution aims at the description of a new species of the genus Schizopera. Materials and methods. Water samples were collected in littoral areas with mangrove and macrophytes, and in the limnetic zone. Twenty five liters of water were taken. Water samples were filtered with a zooplankton net (45μm) and preserved in 70% ethanol. The filtered samples were concentrated to 100 ml and examined in a Bogorov camera. Copepods were separated. Observations and drawings of S. evelynae sp. nov. were made at a magnification of 1000X. Results. Schizopera evelynae sp. nov. seems to be closely related to S. giselae Jiménez -Álvarez 1988 and to S. pratensis Noodt 1958 based on the armature formula of P1-P4, but can be separated from these two species based on the relative length of P1ENP, length/width ratio of P1ENP2, relative length of the outer proximal and distal spines on P4EXP3, shape of the exopod and relative length of the exopodal setae of the female P5, shape and length/width ratio of the male P2ENP2, and male P5 baseoendopodal lobe:exopod length ratio. A key to the species of Schizopera from America is given. Conclusion. A new species of the genus Schizopera is described. The Colombian material shares most characters with S. giselae and S. pratensis.

scholarly journals A new genus and two new species of cave-dwelling cyclopoids (Crustacea, Copepoda) from the epikarst zone of Thailand and up-to-date keys to genera and subgenera of the Bryocyclops and Microcyclops groups

2018 ◽  
Author(s):  
Chaichat Boonyanusith ◽  
La-orsri Sanoamuang ◽  
Anton Brancelj
Keyword(s):  
New Species ◽  
New Genus ◽  
Distal Segment ◽  
Specific Shape ◽  
Mandibular Palp ◽  
Former Ussr ◽  
Caudal Rami ◽  
Central Thailand ◽  
Swimming Leg ◽  
Copepoda Cyclopoida

Two obligate cave-dwelling species of cyclopoid copepods (Copepoda, Cyclopoida) were discovered inside caves in central Thailand. Siamcyclops cavernicolus gen. et sp. nov. was recognised as a member of a new genus. It resembles Bryocyclops jankowskajae Monchenko, 1972 from Uzbekistan (part of the former USSR). It differs from it by (1) lack of pointed triangular prominences on the intercoxal sclerite of the fourth swimming leg, (2) mandibular palp with three setae, (3) spine and setal formulae of swimming legs 3.3.3.2 and 5.5.5.5, respectively, and (4) specific shape of spermatophore. Metacyclops thailandicus sp. nov. resembles M. cushae Reid, 1991 from Louisiana (USA). It differs from it by (1) distal segment of the endopod of the fourth swimming leg with one apical spine, (2) the fifth swimming legs with one broad segment, (3) the spine formula of the distal segment of the exopod of the swimming legs 3.4.3.3, and (4) well developed anal operculum reaching articulation with caudal rami. Detailed descriptions of the habitats of the new species and up-to-date keys to the genera and subgenera of the Bryocyclops and Microcyclops groups are provided, along with an updated list of obligate groundwater species of Copepoda in Southeast Asia.

scholarly journals Two new species of Metacyclops Kiefer, 1927 (Copepoda, Cyclopoida) from Thailand and an up-to-date key to the species recorded in Asia

2022 ◽  
Vol 787 ◽  
pp. 146-181
Author(s):  
Sujeephon Athibai ◽  
Koraon Wongkamhaeng ◽  
Chaichat Boonyanusith
Keyword(s):  
New Species ◽  
Dorsal Surface ◽  
The Body ◽  
Width Ratio ◽  
Caudal Ramus ◽  
Southern Thailand ◽  
Two New Species ◽  
Length Width ◽  
Surface Length ◽  
Swimming Leg

Metacyclops sakaeratensis sp. nov. and M. brancelji sp. nov. are described as being present in the mountainous areas of Northeastern and Southern Thailand, respectively. Two new species resemble M. woni in both sexes, but they are easily distinguished from their Cambodian relative by having: 1) transverse suture on the dorsal surface of the genital double-somite, 2) serrated hyaline frill on the posterior margin of third pedigerous somite, 3) different length / width ratio of caudal ramus, and 4) a row of spinule on caudal surface of intercoxal sclerite of the third swimming legs. The significant differences between M. sakaeratensis sp. nov. and M. brancelji sp. nov. are present in both sexes, including the body size, integumental ornamentation of the body surface, length / width ratio of caudal ramus, armature of the fifth swimming leg, and the male sixth swimming leg. In addition, an up-to-date key to the female of all fifteen species of Metacyclops recorded in Asia is provided.

Three new species of Cerviniella Smirnov, 1946 (Copepoda: Harpacticoida) from the Arctic

Zootaxa ◽  
2012 ◽  
Vol 3345 (1) ◽  
pp. 1 ◽  
Author(s):  
TERUE C. KIHARA ◽  
PEDRO MARTÍNEZ ARBIZU
Keyword(s):  
New Species ◽  
Distal Segment ◽  
The Arctic ◽  
Review Of The Literature ◽  
Key To Species ◽  
Close Relationship ◽  
Different Depths ◽  
Three New Species ◽  
Caudal Rami ◽  
The Laptev Sea

Considered one of the most common harpacticoid families in deep-sea benthos, the Aegisthidae can be found in varioustypes of marine sediments and at different depths. During the fourth leg of the ninth expedition of RV Polarstern in theArctic Ocean (ARK-IX/4) in September 1993, three new representatives of the genus Cerviniella were collected in mul-ticorer samples from the Laptev Sea at depths of 760-2017 m. The new species have a close relationship, as indicated by thecombination of shared characters: distal segment of antennule with aesthetasc, antennary endopod with two setae and one spinelaterally, and four spines and three setae apically; and the same number of armature elements on the maxillula and maxilla.Cerviniella danae sp. nov. and C. hitoshii sp. nov. can be easily distinguished from their congeners primarily by the reductionof the antennules to only five segments, which is common to both species but unique in Cerviniella. Cerviniella danae sp. nov.is most readily separated from other described species by the armature of the antennule and maxilliped, and the spine and setaformulae of the swimming legs. For C. hitoshii sp. nov., major diagnostic differences are found in the maxilliped, segmentationand setation of P3 and P4 endopods, and P6 represented by three setae. Cerviniella arctica sp. nov. is unique in the combinationof the following characters: caudal rami extremely elongated, armature of the antennules and mandible, and the spine and setaformulae of the swimming legs. Based on a review of the literature, an updated listing of the P1-P4 armature and a key to species of the genus are presented.

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