scholarly journals Bibliographic revision of Mesacanthion Filipjev, 1927 (Nematoda: Thoracostomopsidae) with description of a new species from Jeju Island, South Korea

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e8023 ◽  
Author(s):  
Raehyuk Jeong ◽  
Alexei V. Tchesunov ◽  
Wonchoel Lee
Keyword(s):  
New Species ◽  
South Korea ◽  
Puget Sound ◽  
Morphological Characters ◽  
Jeju Island ◽  
Valid Species ◽  
Nomen Nudum ◽  
Species Inquirenda ◽  
Index Value ◽  
A New Species

A new species of the genus Mesacanthion Filipjev, 1927 was discovered during a survey of natural beaches of Jeju Island in South Korea. The new species Mesacanthion jejuensis sp. nov. shares general morphology of the genus such as the outer labial and cephalic setae being situated at the middle of cephalic capsule, well-developed mandibles with two columns united by a curved bar, and three equally sized and shaped teeth shorter than the mandibles. The new species belongs to a group of Mesacanthion species in which spicules are shorter than two anal body diameters. The new species is most closely related to M. pannosum, first discovered in Puget Sound, Washington, in terms of having enlarged cervical setae flap at the end of cephalic capsule, spicules which are shorter than 2 anal body diameter, both supplementary organ and gubernaculum. It can be distinguished from M. pannosum by its stronger inner labial setae, longer outer labial setae, and difference in the index value of b and c’. Along with the description of Mesacanthion jejuensis sp. nov., the genus Mesacanthion Filipjev, 1927 is bibliographically reviewed and revised. Including the new species, a total of 48 species are described within the genus; 39 which are valid; eight which are considered to be species inquirenda due to misplacement of genus and poor description; one which is considered nomen nudum. An updated diagnosis of the genus is provided along with a compiled tabular key comparing different diagnostic morphological characters of all valid species, as well as a pictorial key consisting of 21 species with spicules shorter than two anal body diameters.

scholarly journals A new species of Sacada Walker, 1862 from Thailand (Lepidoptera, Pyralidae, Pyralinae)

2020 ◽  
Vol 4 (2) ◽  
pp. 71-77
Author(s):  
Markku J. Pellinen ◽  
Reza Zahiri ◽  
Pasi Sihvonen
Keyword(s):  
New Species ◽  
Dna Barcode ◽  
Morphological Characters ◽  
Valid Species ◽  
Morphological Comparison ◽  
Northern Thailand ◽  
Lepidoptera Pyralidae ◽  
A New Species

A new species of Sacada from northern Thailand is described: S. chaehomensissp. nov. Pellinen & Zahiri (Lepidoptera: Pyralidae, Pyralinae). Morphological characters and DNA barcode data are provided for the new species, with a morphological comparison to S. dzonguensis and S. umtasorensis, and a DNA-barcode comparison to S. ragonotalis and S. albioculalis, respectively. After this addition, the current number of valid species in the genus Sacada is 43.

scholarly journals A new climbing shrew from Sulawesi highlights the tangled taxonomy of an endemic radiation

2019 ◽  
Vol 100 (6) ◽  
pp. 1713-1725 ◽  
Author(s):  
Jacob A Esselstyn ◽  
Anang S Achmadi ◽  
Heru Handika ◽  
Thomas C Giarla ◽  
Kevin C Rowe
Keyword(s):  
New Species ◽  
Genetic Data ◽  
Morphological Characters ◽  
Small Sample ◽  
Valid Species ◽  
Undescribed Species ◽  
Type Specimens ◽  
Areas Of Endemism ◽  
Small Sample Sizes ◽  
A New Species

Abstract We describe a new species of Crocidura (Soricidae) from Sulawesi Island, Indonesia, documenting its novelty with both genetic and morphological characters. The new species is widespread on the island, with vouchered records from nine general localities distributed among five of the island’s areas of endemism. Morphologically, the new species is readily distinguished from all other described Sulawesi Crocidura by its intermediate body size, gray pelage, and long, hairy tail. The new species was mainly captured in pitfalls placed in the ground, but we also obtained evidence that it readily climbs trees and may be scansorial in its locomotor habits. Populations of the new species sampled from across the island are closely related, separated by < 0.02 uncorrected mitochondrial p-distances. The new species is one member of an endemic radiation of shrews on Sulawesi now known to contain six valid species and several undescribed species, all within the genus Crocidura. Resolution of species limits and phylogenetic relationships in this radiation is hindered by habitat loss at type localities, historical designation of new species using very small sample sizes, and a lack of genetic data from type specimens. Kami mendeskripsikan spesies baru Crocidura (Soricidae) dari Pulau Sulawesi, Indonesia, sekaligus mendokumentasikan keunikan karakter secara genetik maupun morfologi dari spesies tersebut. Spesies baru ini tersebar luas di Pulau Sulawesi, diketahui berdasarkan spesimen yang berasal dari sembilan lokasi umum yang tersebar di lima kawasan endemik di pulau tersebut. Secara morfologi, spesies baru ini dapat dibedakan dari spesies Crocidura lainnya dari Sulawesi berdasarkan ukuran tubuh yang sedang, rambut tubuh berwarna abu-abu, dan ekor yang panjang dan berambut. Spesies baru ini sebagian besar diperoleh dari perangkap sumuran yang ditanam didalam tanah, selain itu kami juga mendapatkan bukti bahwa spesies ini mampu memanjat pohon dan kemungkinan memiliki perilaku sebagai pemanjat. Beberapa populasi spesies yang dikoleksi dari Sulawesi ini mempunyai kekerabatan yang dekat, hanya dipisahkan oleh jarak proporsi DNA mitokondria (tidak terkoreksi) sebesar < 0.02. Spesies baru ini merupakan salah satu anggota dari suatu kelompok radiasi endemik cecurut di Sulawesi yang sampai saat ini diketahui terdiri atas enam spesies yang valid, dan beberapa spesies yang belum dideskripsikan, semuanya termasuk didalam genus Crocidura. Kepastian dalam menetapkan batasan jarak antar spesies dan hubungan kekerabatan genetik dari radiasi kelompok cecurut di Sulawesi terkendala oleh kerusakan habitat pada lokasi spesimen tipe, sejarah penamaan spesies yang hanya berdasarkan sampel yang sedikit, dan keterbatasan data molekuler dari spesimen tipe.

scholarly journals A new species of the genus Centruroides Marx (Scorpiones, Buthidae) from western Michoacán State, México using molecular and morphological evidence

ZooKeys ◽  
2019 ◽  
Vol 859 ◽  
pp. 31-48
Author(s):  
Ana F. Quijano-Ravell ◽  
Luis F. de Armas ◽  
Oscar F. Francke ◽  
Javier Ponce-Saavedra
Keyword(s):  
New Species ◽  
Mitochondrial Gene ◽  
Morphological Characters ◽  
Integrative Taxonomy ◽  
Valid Species ◽  
Morphological Evidence ◽  
Molecular Evidence ◽  
Mountain Range ◽  
A New Species ◽  
Gene Mrna

A new species of scorpion belonging to the genus Centruroides Marx, 1890 is described from the Coalcomán mountain range, western Michoacán State, Mexico. Its general aspect resembles Centruroidesruana Quijano-Ravell & Ponce-Saavedra, 2016, and C.infamatus (C. L. Koch, 1844), but it is a smaller species having lower pectinal tooth counts; also, males of C.ruana have the pedipalp chelae slightly thicker, whereas C.infamatus has a subaculear tubercle nearer to the base of the aculeus. Another species with similar aspect is Centruroidesornatus Pocock, 1902; however, a preliminary molecular analysis of the mitochondrial gene mRNA 16S showed genetic divergence (measured as p-distance) near to 10% between these species, and lower differences between the new species with respect to C.infamatus (4.63%) and C.ruana (5.07%). The molecular evidence together with the morphological characters (integrative taxonomy) are sufficient for recognizing the Coalcomán population as a separate and valid species.

scholarly journals Two species of Thoracostomopsidae (Nematoda: Enoplida) from Jeju Island, South Korea

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9037
Author(s):  
Raehyuk Jeong ◽  
Alexei V. Tchesunov ◽  
Wonchoel Lee
Keyword(s):  
New Species ◽  
Original Description ◽  
Jeju Island ◽  
Valid Species ◽  
Intertidal Zones ◽  
The Family ◽  
C Subunit ◽  
Index Value ◽  
Similar Body ◽  
First Time

During a survey of intertidal zones at beaches on Jeju Island, two species belonging to the family Thoracostomopsidae were discovered. One new species, Enoploides koreanus sp. nov. and one known species, Epacanthion hirsutum Shi & Xu, 2016 are reported. Along with morphological analysis, mitochondrial cytochrome oxidase c subunit 1 (mtCOI) sequences and 18S rRNA sequences of the species were also obtained and used to check relative p-distance and phylogenetic positions. While most species of Enoploides have long spicules, the new species belongs to a group of Enoploides with short spicules < 150 µm). Of the seven species with short spicules, the new species is most closely related to E. disparilis Sergeeva, 1974. They both have similar body length, fairly similar sized and shaped spicules with small gubernaculum running parallel to distal end of spicule, and an index value of b. The new species can be distinguished from E. disparilis by having pre-anal supplementary organ with short conical tail, while E. disparilis lacks pre-anal supplementary organ and has a long conico-cylindrical tail. Along with the description of the new species, the genus Enoploides Ssaweljev, 1912 is bibliographically reviewed and revised. Of 45 species described to date, 27 are now considered valid, 16 species inquirendae due to inadequate descriptions and ambiguity of the material examined, along with two cases of nomen nudum. With this review, we provide an updated diagnosis and list of valid species, a tabular key comparing diagnostic characters of all valid species, and a new complete key to species. One known species, Epacanthion hirsutum Shi & Xu, 2016, is reported in Korea for the first time. The morphology agrees well with the original description provided by Shi & Xu, 2016. As they had already reviewed the genus at the time of reporting four Epacanthion species, we provide only a description, depiction, and measurements for comparison purposes.

scholarly journals First report of the genus Rhyncholagena Lang, 1944 from the South China Sea, with the description of a new species (Crustacea, Copepoda, Harpacticoida, Miraciidae)

ZooKeys ◽  
2018 ◽  
Vol 805 ◽  
pp. 15-31
Author(s):  
Lin Ma ◽  
Xin-zheng Li
Keyword(s):  
New Species ◽  
South China Sea ◽  
South China ◽  
Morphological Characters ◽  
Valid Species ◽  
Sediment Samples ◽  
First Report ◽  
China Sea ◽  
A New Species ◽  
The China Seas

During analysis of sediment samples from South China Sea, a new species belonging to the genusRhyncholagenaLang, 1944 was found and described here.Rhyncholagenaparaspinifersp. n.differs from its congeners by the following combined characteristics: body ornamented dorsally with at least one row of spinules on each somite except penultimate urosomite; A2 exopod two-segmented; P1 enp-2 with one inner seta; P3 exp-3 with two inner setae, P3 enp-2 with one inner seta; female P5 exopod with five setae; male P5 baseoendopod with two setae and exopod with four setae. This is the first report of the genusRhyncholagenain the China seas. In addition, a key to all valid species ofRhyncholagenais given, along with tables of morphological characters of all valid species and their distributions.

Description of new species of Resachus Delève, 1968 (Coleoptera: Limnichidae)

Zootaxa ◽  
2020 ◽  
Vol 4852 (5) ◽  
pp. 578-581
Author(s):  
KEITA MATSUMOTO
Keyword(s):  
New Species ◽  
Democratic Republic ◽  
Democratic Republic Of Congo ◽  
Morphological Characters ◽  
Valid Species ◽  
Republic Of Congo ◽  
A New Species

There are 55 valid species and 8 genera of Afrotropical Limnichidae currently described (Delève, 1968; Spangler et. al. 2001; Hernando & Ribera, 2006; Hernando & Ribera, 2014). Resachus Delève is within the “Mandersia group of genera” according to Hernando & Ribera (2005) with 3 known species: Resachus lineatifrons Delève, 1968 [Democratic Republic of Congo, Zambia]; Resachus schuhi Hernando & Ribera, 2006 [Madagascar]; Resachus striatellus Delève, 1968 [Democratic Republic of Congo, Nigeria] (Delève, 1968; Hernando & Ribera, 2006). Specimens from Malawi have been identified as a new species. The new species have morphological characters, described in this paper, that distinguish them from any other known Resachus. 

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