scholarly journals A multigene and morphological analysis expands the diversity of the seabod shrimp Xiphopenaeus Smith, 1869 (Decapoda: Penaeidae), with descriptions of two new species

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Abner Carvalho-Batista ◽  
Mariana Terossi ◽  
Fernando J. Zara ◽  
Fernando L. Mantelatto ◽  
Rogerio C. Costa
Keyword(s):  
New Species ◽  
Morphological Analysis ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Integrative Approach ◽  
Genetic Groups ◽  
The Pacific ◽  
Two New Species ◽  
The Status ◽  
History Of

Abstract After being stable for nearly a century, the taxonomic history of the genus Xiphopenaeus has been marked by many changes in the last three decades. The taxonomic status of the Atlantic species has a low resolution, and many species are still undefined and grouped as cryptic species. Here we employed an integrative approach to define the species of Xiphopenaeus and the morphological characters needed to differentiate them. We combined the analyses of two molecular markers (COI and 16 S rDNA), scanning electron microscopy and light microscopy. Based on specimens from 17 localities from the Atlantic and Pacific oceans, we detected five divergent genetic groups, three in the Atlantic (A1, A2, A3) and two in the Pacific (P1, P2). Male secondary sexual characters were able to differentiate four out of the five genetic groups. Group A1 corresponds to X. kroyeri, and A2 and A3 correspond to new species. We redescribed the genus and two new species are described and illustrated: Xiphopenaeus dincao nov. sp. (A2) and Xiphopenaeus baueri nov. sp. (A3). Since the holotype of X. riveti was missing and the specimen analysed from group P2 was a female, the status of the species of Xiphopenaeus from the Pacific remains unresolved.

Species diversity and phylogeny of the deep-sea genus Pseudomma (Crustacea: Mysida)

Zootaxa ◽  
2004 ◽  
Vol 649 (1) ◽  
pp. 1 ◽  
Author(s):  
KENNETH MELAND
Keyword(s):  
Deep Sea ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Stabilizing Selection ◽  
Frequency Coding ◽  
Morphological Stasis ◽  
The Pacific ◽  
Branching Patterns ◽  
History Of ◽  
General Frequency

The mysidacean genus Pseudomma G.O. Sars, 1870 occurs throughout the world s oceans, containing 38 highly endemic and primarily deep sea species. The taxonomic history of the genus and taxonomic status of species currently included in Pseudomma is reviewed. Pseudomma kruppi W.M. Tattersall, 1909 is for the first time recorded from the Pacific Ocean. A comparative study of morphology suggests morphological stasis within the genus Pseudomma, possibly a result of stabilizing selection in a homogeneous deep-sea environment. 71 morphological characters are used to reconstruct Pseudomma phylogeny. The general frequency coding method (GFC) was applied in re-coding 14 polymorphic characters. Fifty-seven conventional characters were treated in separate analyses as either ordered or unordered to investigate how assumptions on character transformation influenced phylogeny. Maximum parsimony searches with both assumptions produced incongruent trees with conflicting branching patterns particularly in deeper nodes. A meaningful interpretation of origin and radiation in early lineages proved to be difficult. Recognition of consistent and more robust branching patterns in several recent lineages suggest monophyletic species groups that are confined within three major geographic areas, North Atlantic, northern Pacific and Antarctic. Branching order could be attributed to speciation events that were in accordance with recent geological history, such as the closing of the Panama Isthmus and establishment of the Norwegian Sea.

scholarly journals The extraordinary genus Myja is not a tergipedid, but related to the Facelinidae s. str. with the addition of two new species from Japan (Mollusca, Nudibranchia)

ZooKeys ◽  
2019 ◽  
Vol 818 ◽  
pp. 89-116 ◽  
Author(s):  
Alexander Martynov ◽  
Rahul Mehrotra ◽  
Suchana Chavanich ◽  
Rie Nakano ◽  
Sho Kashio ◽  
...  
Keyword(s):  
New Species ◽  
Molecular Data ◽  
Pacific Waters ◽  
The Pacific ◽  
The Family ◽  
Two New Species ◽  
History Of ◽  
Morphological And Molecular Data ◽  
First Time ◽  
The Relationship

Morphological and molecular data are presented for the first time in an integrative way for the genus Myja Bergh, 1896. In accordance with the new molecular phylogenies, the traditional Facelinidae is paraphyletic. Herein is presented the phylogenetic placement of true Facelinidae s. str., including the first molecular data for F.auriculata (Müller, 1776), type species of the genus Facelina Alder & Hancock, 1855. The taxonomic history of F.auriculata is reviewed. The genus Myja is related to the clade Facelinidae s. str., but shows disparate morphological traits. Two new species of the genus Myja, M.karinsp. n., and M.hyotansp. n., are described from the Pacific waters of Japan (middle Honshu), and M.cf.longicornis Bergh, 1896 is investigated from Thailand. According to molecular analysis and review of available morphological information, the genus Myja contains more hidden diversity. The family-level relationship within aeolidacean nudibranchs with emphasis on the family Facelinidae is outlined. The problem of the relationship between Facelinidae Bergh, 1889 and Glaucidae Gray, 1827 is discussed. The family Glaucidae has precedence over Facelinidae and is phylogenetically related to the core group of Facelinidae s. str., but has a profoundly modified aberrant external morphology, thus making a purely molecular-based approach to the taxonomy an unsatisfactory solution. To accommodate recently discovered hidden diversity within glaucids, the genus Glaucilla Bergh, 1861 is restored. The family Facelinidae s. str. is separate from, and not closely related to, a clade containing the genera Dondice Marcus, 1958, Godiva MacNae 1954, Hermissenda Bergh, 1879, and Phyllodesmium Ehrenberg, 1831 (= Myrrhine Bergh, 1905). The oldest valid available name for the separate ex-facelinid paraphyletic clade that contains several facelinid genera is Myrrhinidae Bergh, 1905, and resurrection of this family name under provision of the ICZN article 40.1 can preliminarily solve the problem of paraphyly of the traditional Facelinidae. “Facelinidae” s. l. needs to be further divided into several separate families, pending further study.

Morphology and systematics of the genus Anonchus Cobb, 1913 (Nematoda: Leptolaimina) and reappraisal of the family Aphanolaimidae Chitwood, 1936 n. rank

Nematology ◽  
2002 ◽  
Vol 4 (6) ◽  
pp. 725-757
Author(s):  
Aldo Zullini ◽  
Oleksandr Holovachov ◽  
Pieter Loof ◽  
Tom Bongers
Keyword(s):  
New Species ◽  
Morphological Analysis ◽  
Morphological Characters ◽  
Type Material ◽  
Diagnostic Significance ◽  
The Family ◽  
Two New Species ◽  
Emended Diagnosis

AbstractThe genus Anonchus is revised. The genera Assia and Haconnus are considered to be synonymous with Anonchus on the basis of the morphological analysis. Additional descriptions of six species, viz. A. maculatus , A. mirabilis , A. millelacunatus , A. palaeotropicus , A. coomansi and A. pulcher are provided on the basis of type material or recently collected populations. The lectotype of A. monohystera is designated and described and the synonymy of this species with A. maculatus is confirmed. Two new species are described; A. winiszewskae sp. n. from Paraguay and A. venezolanus sp. n. from Venezuela. Several aspects of the morphology are described and the variability and diagnostic significance of the main morphological characters discussed. A study of intrageneric and suprageneric taxonomy of the genus Anonchus is presented. The subfamily Aphanolaiminae is reinstated for the genera Aphanolaimus, Aphanonchus and Paraphanolaimus and raised to family rank. The family Aphanolaimidae includes two subfamilies: Aphanolaiminae and Anonchinae. An emended diagnosis and a revised classification of Anonchus are proposed and a key to the species of the genus is provided.

Taxonomic status of Tropiocolotes cf. steudneri with a description of a new species of Tropiocolotes (Reptilia: Squamata: Gekkonidae) in southern Iran

Zootaxa ◽  
2018 ◽  
Vol 4388 (2) ◽  
pp. 283 ◽  
Author(s):  
MAHDI RAJABIZADEH ◽  
HIVA FAIZI ◽  
STEVEN C. ANDERSON ◽  
MOHAMMAD ZARRINTAB ◽  
ROMAN NAZAROV
Keyword(s):  
New Species ◽  
Taxonomic Status ◽  
The Other ◽  
Southern Iran ◽  
Taxonomic History ◽  
The Status ◽  
History Of ◽  
A New Species

We review the status of an Iranian gecko population previously referred to Tropiocolotes cf. steudneri and describe it as a new species, Tropiocolotes hormozganensis sp. nov. We discuss the taxonomic history of this population and compare its characters with those of the other species in the genus. The new species is distinguished from other species of Tropiocolotes by possessing weakly keeled dorsal scales and smooth ventral scales, having imbricate scales on dorsal and ventral tail, possessing clearly tricarinatesubdigital scales, 48–55 dorsal scales, two pairs of postmental shields, of which the second pair is about half of the size of the first, 100–107 scales longitudinally along underside of body, 15–19 scales across head and 16–19 subdigital lamellae. 

Morphological traits and molecular analysis for two new Chrysosporium species from Fujian Province, China

Phytotaxa ◽  
2019 ◽  
Vol 400 (5) ◽  
pp. 257
Author(s):  
ZHONG LI ◽  
YAN-WEI ZHANG ◽  
WAN-HAO CHEN ◽  
YAN-FENG HAN
Keyword(s):  
New Species ◽  
Molecular Analysis ◽  
Forest Soils ◽  
Morphological Traits ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Fujian Province ◽  
5.8S Rdna ◽  
Rdna Sequences ◽  
Two New Species

Two new species, Chrysosporium laterisporum and C. ovalisporum, were isolated from forest soils and zoo soils in Fuzhou City, Fujian Province, China, using child hair as baits. Molecular (ITS-5.8S rDNA sequences) and morphological characters were used to identify taxonomic status. The phylogeny showed C. laterisporum and C. ovalisporum grouped into a separate subclade, closely related to C. georgii, C. magnasporum, C. oceanitesii and C. vespertilium. These previously described Chrysosporium species can be distinguished from the new species based on morphology alone.

scholarly journals Molecular phylogenetic analysis of a taxonomically unstable ranid from Sumatra, Indonesia, reveals a new genus with gastromyzophorous tadpoles and two new species

2018 ◽  
Vol 94 (1) ◽  
pp. 163-193 ◽  
Author(s):  
Umilaela Arifin ◽  
Utpal Smart ◽  
Stefan T. Hertwig ◽  
Eric N. Smith ◽  
Djoko T. Iskandar ◽  
...  
Keyword(s):  
New Species ◽  
New Genus ◽  
Phylogenetic Analyses ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
12S Rrna ◽  
Molecular Evidence ◽  
Molecular Barcoding ◽  
Wide Range ◽  
Two New Species

The presence of an adhesive abdominal sucker (gastromyzophory) allows tadpoles of certain species of anurans to live in fast-flowing streams. Gastromyzophorous tadpoles are rare among anurans, known only in certain American bufonids and Asian ranids. To date,Huia sumatrana, which inhabits cascading streams, has been the only Sumatran ranid known to possess gastromyzophorous tadpoles. In the absence of thorough sampling and molecular barcoding of adults and larvae, it has remained to be confirmed whether other Sumatran ranid species living in similar habitats, i.e.,Chalcorana crassiovis, possesses this larval type. Moreover, the taxonomic status of this species has long been uncertain and its taxonomic position within the Ranidae, previously based exclusively on morphological characters, has remained unresolved. To study the diversity and relationships of these frogs and to establish the identity of newly collected gastromyzophorous tadpoles from Sumatra, we compared genetic sequences ofC. crassiovis-like taxa from a wide range of sites on Sumatra. We conducted bayesian and maximum likelihood phylogenetic analyses on a concatenated dataset of mitochondrial (12S rRNA, 16S rRNA, and tRNAval) and nuclear (RAG1 and TYR) gene fragments. Our analyses recoveredC. crassiovisto be related toClinotarsus,Huia, andMeristogenys. The DNA barcodes of the gastromyzophorous tadpoles matched adults from the same sites. Herein, we provide a re-description of adultC. crassiovisand propose “C. kampeni” as a synonym of this species. The molecular evidence, morphological features, and distribution suggest the presence of two related new species. The two new species andC. crassiovistogether represent a distinct phylogenetic clade possessing unique molecular and morphological synapomorphies, thus warranting a new genus.

Ramalina europaeaandR. labiosorediata, two new species of theR. pollinariagroup (Ascomycota:Ramalinaceae), and new typifications forLichen pollinariusandL. squarrosus

2017 ◽  
Vol 49 (4) ◽  
pp. 301-319 ◽  
Author(s):  
Arsen GASPARYAN ◽  
Harrie J. M. SIPMAN ◽  
Robert LÜCKING
Keyword(s):  
New Species ◽  
Maximum Likelihood ◽  
North America ◽  
Geographical Distribution ◽  
Morphological Characters ◽  
Small Spine ◽  
Maximum Likelihood Tree ◽  
Two New Species ◽  
The Status ◽  
Morphological Differences

AbstractRamalina europaeaGasparyan, Sipman & Lücking andR. labiosorediataGasparyan, Sipman & Lücking, two species of theR. pollinariagroup, are described here as new to science.Ramalina europaea, widely distributed in Europe, can be distinguished by small, punctiform, often terminal soralia starting out on small, spine-like branchlets, whereasR. labiosorediatafrom North America differs fromR. pollinarias. str. andR. europaeain the almost exclusively terminal soralia formed on the tips of normal lobes, originating from the underside and becoming irregularly labriform. Morphological characters, chemistry, ecology and geographical distribution are discussed and a key to the species of theRamalina pollinariagroup is provided. The topology of a maximum likelihood tree based on ITS shows the presence of three well-supported clades, corresponding to the morphological differences of the three species. The status of several historical names variously placed in synonymy with or described as infraspecific entities ofR. pollinariais reassessed and a new neotype and an epitype are designated forLichen pollinarius, a neotype forL. squarrosus, making it a synonym ofR. farinacea, and lectotypes forR. pollinariavar.elatior, making it a synonym ofR. pollinarias. str., and for var.humilis, a taxon of yet unknown affinity.

Revision of the subgenus Neopsacas (Hexactinellida, Rossellidae, Crateromorpha) with the description of new species and subspecies

Zootaxa ◽  
2007 ◽  
Vol 1463 (1) ◽  
pp. 55-68 ◽  
Author(s):  
LARISA L. MENSHENINA ◽  
KONSTANTIN R. TABACHNICK ◽  
DORTE JANUSSEN
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Close Relation ◽  
Morphological Characters ◽  
The Pacific ◽  
The Status ◽  
New Diagnosis ◽  
Phylogenetic Affinities

Discovery of new specimens of Crateromorpha (Neopsacas), which are attributed to new species, from the Pacific, Antarctic and Indian Oceans and the description of new specimen also from the Atlantic Ocean allow us to review the skeletal characters regarding the dermal-hypodermal-atrial-hypoatrial spicule composition in various species of subgenus C. (Neopsacas). A new diagnosis of this taxon is proposed, and several new species and subspecies described: Crateromorpha (Neopsacas) krinovi krinovi sp. nov., ssp. nov., Crateromorpha (Neopsacas) krinovi discoli ssp. nov. and Crateromorpha (Neopsacas) obi sp. nov. The status of the subgenus Neopsacas within the Rossellidae and its close relation to Caulophacus are now well established according to morphological characters. The distribution of this subgenus is wide: Atlantic, Pacific, Indian and Antarctic Oceans. Possible phylogenetic affinities between the genera Crateromorpha and Caulophacus are discussed.

scholarly journals Taxonomic Status of Neoechinorhynchus Agilis (Acanthocephala, Neoechinorhynchidae), with a Description of two New Species of the Genus from the Atlantic and Pacific Mullets (Teleostei, Mugilidae)

2014 ◽  
Vol 48 (4) ◽  
pp. 291-306 ◽  
Author(s):  
Ie. V. Tkach ◽  
V. L. Sarabeev ◽  
L. S. Shvetsova
Keyword(s):  
Morphological Analysis ◽  
Taxonomic Status ◽  
Ne Atlantic ◽  
Atlantic Region ◽  
Comparative Morphological Analysis ◽  
The Pacific ◽  
Two New Species ◽  
Wide Variability ◽  
Voucher Specimens ◽  
Acanthocephalan Parasite

Abstract The wide variability in morphological features, geographical and host ranges of mullet acanthocephalan parasite Neoechinorhynchus agilis (Rudolphi, 1819), raises the question of taxonomic status of this species. Rudolphi’s type and Yamaguti`s voucher specimens, as well as our own material from the WW Pacific and NE Atlantic region were used herein to provide comparative morphological analysis. Th e study revealed three different species of Neoechinorhynchus, N. (N.) agilis and N. (H.) personatus Tkach, Sarabeev et Shvetsova, sp. n. in the Atlantic and N. (H.) yamagutii Tkach, Sarabeev et Shvetsova, sp. n. in the Pacific. Strong morphological and morphometric differences were found between three described herein species from different hosts and regions. Th e dividing of N. agilis into three species, two of them are new, provides a basis for the further revision of host-geographical records of mullet acanthocephalan parasites.

Lactarius verrucosporus sp. nov. and L. nigricans sp. nov., two new species of Lactarius (Russulaceae) from southern China

Phytotaxa ◽  
2018 ◽  
Vol 364 (3) ◽  
pp. 227 ◽  
Author(s):  
GENG-SHEN WANG ◽  
YU SONG ◽  
JING-WEI LI ◽  
SHI-YAO XIA ◽  
LI-HONG QIU
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Internal Transcribed Spacer ◽  
Morphological Analysis ◽  
Novel Species ◽  
Southern China ◽  
Guangdong Province ◽  
Morphological Characters ◽  
Two New Species ◽  
Morphological Differences

Two new species of Lactarius from Dinghu Mountain, Guangdong Province in southern China were described based on both morphological characters and phylogenetic analysis of internal transcribed spacer (ITS) sequences. Lactarius verrucosporus sp. nov. is characterized by reddish brown pileus with white and decurved margin, pale cream lamellae, globose to subglobose basidiospores with isolated warts, thin pileipellis composed of globose subterminal cells and inflated terminal elements. Lactarius nigricans sp. nov. is recognized by greyish brown pileus, beige lamellae, amyloid basidiospores with high ridges, subcylindrical to subfusiform caulocystidia, thick pileipellis with long terminal cells. Both molecular and morphological analysis consistently confirm that L. verrucosporus and L. nigricans belong to Lactarius subgenera Russularia and Plinthogalus, respectively, and both species are distinct from all described species of these two subgenera. The morphological differences of these two novel species with their closely related taxa are discussed.

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