Taxonomy notes and new occurrence data of four species of atyid shrimp (Crustacea: Decapoda: Atyidae) in Vietnam, all described from China

Freshwater shrimp of the family Atyidae De Haan, 1849 have been studied in Vietnam for more than a century. A total of 24 species of atyid shrimps from the genera Caridina H. Milne Edwards, 1837, Neocaridina Kubo, 1938, Atyopsis Chace, 1983 have been recorded from Vietnam. With 22 species, the majority are from the genus Caridina. In 2013, Karge and Klotz mentioned the occurrence of four yet undescribed species belonging to Paracaridina Liang, Guo & Tang, 1999 in Vietnam without taxonomic details. In general, studies of freshwater atyids in Vietnam are limited and most Vietnamese taxa await a taxonomic revision. The available data do not fully reflect their estimated species diversity in the country and distribution data are deficient. Here, we focus on four species of atyid shrimps from two genera, viz. Caridina cantonensis Yu, 1938, C. lanceifrons Yu, 1936, C. serrata Stimpson, 1860 and Neocaridina palmata (Shen, 1948), all described from China and have been reported to occur in Vietnam. The previous reports on the occurrence of these species in Vietnam are largely unreliable due to taxonomic confusion. To contribute to the knowledge of these taxa, we provide the first verified distribution records of the four species in the country with some taxonomic remarks. This study shows the first taxonomically-verified distribution data of four atyid shrimp species originally described from China, but also reported from Vietnam, albeit under various species names and, in some cases, erroneously. These data allow the first meaningful discussion of the distribution in light of the reproductive strategy of these four species and, in conjunction with the taxonomic remarks, will contribute to the knowledge of these taxa. As a result of this research and data from previous studies, we now consider all four species as widespread and non-endemic, but land-locked (with a complete freshwater life cycle). In Vietnam, all four species are confined to the northern half of the country. Beyond Vietnam, we provide the first records for Caridina lanceifrons from southern Thailand, which suggests a major sampling gap in Indochina.

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A taxonomic review of the Margarodoid genus Stigmacoccus Hempel (Hemiptera: Sternorrhyncha: Coccoidea: Stigmacoccidae), with some details on their biology

Zootaxa ◽

10.11646/zootaxa.1507.1.1 ◽

2007 ◽

Vol 1507 (1) ◽

pp. 1-55 ◽

Cited By ~ 7

Author(s):

CHRIS HODGSON ◽

HEATHER GAMPER ◽

AMAURI BOGO ◽

GILLIAN WATSON

Keyword(s):

Life Cycle ◽

Scale Insect ◽

Present Knowledge ◽

Passerine Birds ◽

Adult Males ◽

Undescribed Species ◽

Annual Life Cycle ◽

Honey Production ◽

Adult Females ◽

The Family

Stigmacoccus is an unusual scale insect genus from Central and South America that has been little studied. It belongs to the family Stigmacoccidae within the archaeococcoid group of genera which used to comprise the family Margarodidae (Morrison, 1927) but which are now considered to represent at least 9 families. The present paper describes or redescribes the adult females, adult males, cyst stages and crawlers of the three known species (S. asper, S. garmilleri, and S. paranaensis), plus the prepupa of S. garmilleri and S. paranaensis, and (briefly), the pupa of S. paranaensis. It is considered that the female has two cyst stage instars; the number in the male is uncertain. Adult female S. asper and S. paranaensis appear to have groups of loculate pores on the walls of the vagina. A lectotype for S. asper is designated. In addition, cyst stages of three further undescribed species are described (but not formally named) and illustrated. Some observations on the biology and life cycle are also included. The honeydew of Stigmacoccus species has been shown to be an important energy source for overwintering passerine birds which defend this resource. A summary of our present knowledge is presented, including how the honedew is eliminated (through a long anal tube) and details are given with regard to rates of honeydew flow, sugar concentration, cyst densities and annual timing of peak flows. The annual life cycle, as far as it is known, is discussed. It is concluded that this honeydew could be economically important as a source of sugar for honey production but this would need to be carefully managed to maintain an ecological balance.

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A critical review and systematic discussion of recent classification proposals for liolaemid lizards

Zootaxa ◽

10.11646/zootaxa.2549.1.1 ◽

2010 ◽

Vol 2549 (1) ◽

pp. 1 ◽

Cited By ~ 65

Author(s):

FERNANDO LOBO ◽

ROBERT E. ESPINOZA ◽

SEBASTIAN QUINTEROS

Keyword(s):

Critical Review ◽

Taxonomic Revision ◽

Not Given ◽

Phylogenetic Classification ◽

Relative Value ◽

The Family ◽

Taxonomic Confusion ◽

Recent Classification ◽

Taxonomic Groups

We provide a critical review of a recent taxonomic revision of Chilean Liolaemus lizards (Iguania: Liolaemidae) by Pincheira-Donoso and Núñez (2005) and a recent paper (PincheiraDonoso et al. 2008), which proposed several new taxonomic and phylogenetic arrangements. We document fundamental problems with many of the proposed taxonomic revisions in both publications, which if followed, could lead to serious taxonomic confusion. In Pincheira-Donoso and Núñez (2005) a subgeneric classification is erected, which was produced by outdated methods (phenetic analyses), cannot be replicated (no matrix is presented), and is taxonomically untenable (some of the subgenera are nested within other subgenera). Most of the taxonomic groups that are proposed have been previously proposed, albeit differently constituted, yet often previous research is not given attribution; when findings are different, the research of others is either overlooked or dismissed without comment. The diagnoses of species and subspecies (including several newly proposed taxa) are often written in an authoritative manner (without supporting data or information), making them insufficient for distinguishing the focal taxon from others belonging to the same group, finally leading to uncertainty regarding the validity of several of the newly proposed taxa, combinations, or synonymies. We also describe less egregious errors of omission and commission. In Pincheira-Donoso et al. (2008), most of the proposals follow the Pincheira-Donoso and Núñez (2005) revisions, some species are allocated to groups without consistent cladistic support and other proposed relationships are based on incomplete evidence from other studies dismissing the limitations of the arrangement. Critical species are not identified in a list of material examined. Finally, Pincheira-Donoso et al. (2008) present a somewhat outdated and biased discussion of the relative value of using molecules or morphology in systematics. In light of these limitations, and in an effort to stabilize and prevent further taxonomic confusion, we provide an updated phylogenetic classification of the currently recognized lizards of the family Liolaemidae (Ctenoblepharys, Liolaemus, and Phymaturus), which is based on a consensus of studies published since the first phylogenetic major revision of the clade in 1995.

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A revision of the extant species of Theodoxus (Gastropoda, Neritidae) in Asia, with the description of three new species

Zoosystematics and Evolution ◽

10.3897/zse.96.48312 ◽

2020 ◽

Vol 96 (1) ◽

pp. 25-66

Author(s):

Arthur F. Sands ◽

Peter Glöer ◽

Mustafa E. Gürlek ◽

Christian Albrecht ◽

Thomas A. Neubauer

Keyword(s):

Species Conservation ◽

Taxonomic Revision ◽

Distribution Data ◽

Undescribed Species ◽

Freshwater Gastropod ◽

Single Location ◽

Extant Species ◽

Species Lists ◽

Three New Species ◽

New Distribution

Asia contains a high species diversity of the freshwater gastropod genus Theodoxus. Recent molecular and morphological reviews of this diversity have uncovered a number of yet undescribed species while suggesting the urgent revision of several others. Moreover, some of these studies have indicated a number of species previously not recorded for this continent. Despite the advancements, a taxonomic revision and an update on the distribution of Theodoxus spp. in Asia is still pending. Here, we construct the most robust phylogeny of Theodoxus up to now and review original descriptions, type material, recent taxonomic revisions, compendia, and species lists to provide a comprehensive checklist of all known extant Asian Theodoxus spp. Our checklist also provides descriptions for three recently discovered and yet undescribed species (Theodoxus gurur Sands & Glöer, sp. nov., Theodoxus wesselinghi Sands & Glöer, sp. nov., and Theodoxus wilkei Sands & Glöer, sp. nov.), as well as shows the need to synonymise several previously described morphospecies. The present revision recognizes 14 extant Theodoxus spp. for Asia. Some of these species are widespread, while others are endemic to just a single location. Based on the revised and new distribution data, we provide updates and new assessments of species conservation statuses.

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A taxonomic revision of Cheilodactylidae and Latridae (Centrarchiformes: Cirrhitoidei) using morphological and genomic characters

Zootaxa ◽

10.11646/zootaxa.4585.1.7 ◽

2019 ◽

Vol 4585 (1) ◽

pp. 121

Author(s):

WILLIAM B. LUDT ◽

CHRISTOPHER P. BURRIDGE ◽

PROSANTA CHAKRABARTY

Keyword(s):

South African ◽

Type Species ◽

New Genus ◽

Taxonomic Revision ◽

African Species ◽

The Past ◽

The Family ◽

The World ◽

Taxonomic Confusion ◽

Systematic Relationships

Systematic relationships within the Cirrhitoidei, a suborder of five closely related families, have been uncertain for over a century. This is particularly true in reference to the families Cheilodactylidae and Latridae, which have been revised numerous times over the past several decades. Species that have been included in these two families are found in temperate regions around the world, which has led to regionally-focused studies that have only exacerbated taxonomic confusion. Here we examine systematic relationships within the Cheilodactylidae and the Latridae using ultraconserved genomic elements with near complete taxonomic sampling, and place our results in the context of the Cirrhitoidei. Our results agree with previous findings suggesting that Cheilodactylidae is restricted to two South African species, with the type species of the family, Cheilodactylus fasciatus Lacépède, forming a clade with C. pixi Smith that together is more closely related to the Chironemidae than to other species historically associated with the genus. We also strongly resolve the relationships of species within the Latridae. As a result of our analyses we revise the taxonomy of Latridae, name a new genus, and re-elevate Chirodactylus and Morwong.

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Taxonomic revision of the genus Paramunida Baba, 1988 (Crustacea: Decapoda: Galatheidae): a morphological and molecular approach

Zootaxa ◽

10.11646/zootaxa.2712.1.1 ◽

2019 ◽

Vol 2712 (1) ◽

pp. 1 ◽

Cited By ~ 8

Author(s):

PATRICIA CABEZAS ◽

ENRIQUE MACPHERSON ◽

ANNIE MACHORDOM

Keyword(s):

New Species ◽

16S Rrna ◽

Taxonomic Revision ◽

Molecular Approach ◽

Undescribed Species ◽

Decapod Crustaceans ◽

Morphological Variations ◽

Mitochondrial Markers ◽

The Family ◽

Morphological Differences

The genus Paramunida belongs to the family Galatheidae, one of the most species rich families among anomuran decapod crustaceans. In spite of the genus has received substantial taxonomic attention, subtle morphological variations observed in numerous samples suggest the existence of undescribed species. The examination of many specimens collected during recent expeditions and morphological and molecular comparisons with previously described species have revelaled the existence of eleven new lineages. All of them are distinguished by subtle and constant morphological differences, which are in agreement with molecular divergences reported for the mitochondrial markers ND1 and 16S rRNA. Here, we describe and illustrate the new species, providing brief redescriptions for the previously known species, and a dichotomous identification key for all species in the genus.

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