Species delimitation in the fern genus Lemmaphyllum (Polypodiaceae) based on multivariate analysis of morphological variation

2013 ◽  
Vol 51 (4) ◽  
pp. 485-496 ◽  
Author(s):  
Xue-Ping WEI ◽  
Xian-Chun ZHANG
Keyword(s):  
Multivariate Analysis ◽  
Morphological Variation ◽  
Species Delimitation

Morphological variation and ecological distribution of co-occurring larval forms of Oreolalax (Anura: Pelobatidae)

1994 ◽  
Vol 15 (2) ◽  
pp. 109-121 ◽  
Author(s):  
H. Bradley Shaffer ◽  
Robert F. Inger ◽  
Guan-Fu Wu ◽  
Er-Mi Zhao
Keyword(s):  
Multivariate Analysis ◽  
Morphological Variation ◽  
Sichuan Province ◽  
Ecological Distribution ◽  
Additional Species ◽  
Maximum Width ◽  
Ecological Segregation ◽  
Number Of Species ◽  
Stream Size

AbstractThe amphibian fauna of Sichuan Province, China, is remarkable for the large number of species of pelobatid frogs, of which species of Oreolalax form a large portion. We have collected larvae of five species of Oreolalax on Mt. Emei, Sichuan, four of these five at a second locality 40 km from Mt. Emei, and larvae of two additional species at a locality 200 km S of Mt. Emei. These tadpoles are very similar to one another morphologically, a conclusion supported by multivariate analysis. We give diagnostic descriptions and a key for the identification of these seven larval forms. All tadpoles of Oreolalax have lotic habits, and the seven species in our study live in small to medium-sized streams (maximum width 8 m). These species show only moderate ecological segregation in terms of stream size and microhabitat type.

Morphological Variation of Dioon (Zamiaceae) from the Pacific Slope of Mexico Using a Multivariate Analysis

2007 ◽  
Author(s):  
Georgina Vargas Amado ◽  
Jorge Alberto Pérez de la Rosa ◽  
José Pablo Torres Morán ◽  
Waldina Patricia Reyes Velázquez
Keyword(s):  
Multivariate Analysis ◽  
Morphological Variation ◽  
The Pacific ◽  
Pacific Slope

Two new species of pitviper of the genus Cryptelytrops Cope 1860 (Squamata: Viperidae: Crotalinae) from Southeast Asia

Zootaxa ◽  
2011 ◽  
Vol 2757 (1) ◽  
pp. 1 ◽  
Author(s):  
ANITA MALHOTRA ◽  
ROGER S. THORPE ◽  
MRINALINI _ ◽  
BRYAN L. STUART
Keyword(s):  
Multivariate Analysis ◽  
New Species ◽  
Species Diversity ◽  
Southeast Asia ◽  
Morphological Variation ◽  
Northern Thailand ◽  
Southern Vietnam ◽  
Two New Species

We describe two new species of green pitviper from Southeast Asia that are morphologically similar to Cryptelytrops macrops, but can be distinguished from that species by genetic means, multivariate analysis of morphology and some aspects of coloration. Cryptelytrops cardamomensis sp. nov., is described from southeastern Thailand and the Cardamom Mountains of southwestern Cambodia. Cryptelytrops rubeus sp. nov. has been recorded from southern Vietnam and eastern Cambodia. These species have previously been confused with C. macrops, hence we also present here a redescription of this species, whose range is now restricted to Thailand, southern and central Laos, and northeastern Cambodia. All three species are present in Cambodia, but have disjunct ranges corresponding to three separate highland regions in southwestern (Cardamom Mountains), northeastern (western edge of the Kontum Plateau) and eastern (low elevation hills on the western edge of the Langbian Plateau) Cambodia for C. cardamomensis, C. macrops and C. rubeus respectively. However, there is still considerable morphological variation between geographically separated populations of C. macrops s.s., and greater sampling in southern and northern Thailand in particular may be required before the species diversity of this group is fully clarified.

scholarly journals Taxonomy of the lesser jerboa Jaculus jaculus (Dipodidae, Rodentia) based on allozymic and morphological variation

2010 ◽  
Vol 56 (4) ◽  
pp. 421-431 ◽  
Author(s):  
Abderraouf Ben Faleh ◽  
Abdelwaheb Ben Othmen ◽  
Khaled Said
Keyword(s):  
Phylogenetic Analysis ◽  
Multivariate Analysis ◽  
Genetic Distance ◽  
North Africa ◽  
Morphometric Analysis ◽  
Morphological Variation ◽  
Taxonomic Status ◽  
Sympatric Species ◽  
Restricted Area ◽  
Meeting Point

Abstract The lesser Egyptian jerboa Jaculus jaculus, is a member of the subfamily Dipodinae, known to have a number of subspecies. Previous studies of J. jaculus from North Africa found various morphological forms of unknown taxonomic status, which are frequently grouped into two taxa: J. jaculus and J. deserti. We assessed the taxonomic status of this taxon in Tunisia using allozymic (phylogenetic analysis of 23 genetic loci encoding 16 enzymatic proteins) and morphological (multivariate analysis of 13 craniodental characters) analyses of 136 J. jaculus specimens collected from seven localities within its distribution range. Allozymic analysis clearly indicated the existence of two distinct groups of J. jaculus, with a mean genetic distance (D) value of 0.99 and FST=0.52. Individuals within the two groups did not show any obvious geographical structuration, even within the Matmata locality which represents the meeting point for the two groups where they were found in sympatry. Additionally, morphometric analysis of 13 craniodental characters was clearly separated the two groups. These results were obtained over a very restricted area of the total distribution of J. jaculus and strongly suggest the occurrence of two separate and often sympatric species within the currently accepted J. jaculus in Tunisia: J. jaculus and J. deserti .

scholarly journals Taxonomic Revision of the Genus Lactifluus (Russulales, Basidiomycota) of South Korea

2021 ◽  
Author(s):  
Hyun Lee ◽  
Komsit Wissitrassameewong ◽  
Myung Soo Park ◽  
Jonathan J. Fong ◽  
Annemieke Verbeken ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Morphological Variation ◽  
North American ◽  
Species Delimitation ◽  
Taxonomic Revision ◽  
Molecular Data ◽  
Similar Species ◽  
Cryptic Diversity ◽  
Intraspecific Morphological Variation

Abstract Lactifluus (Pers.) Roussel is an ectomycorrhizal genus that was recently recognized to be distinct from the genus Lactarius. To date, 216 Lactifluus species have been reported worldwide. Misidentification of Lactifluus species is common because of intraspecific morphological variation, cryptic diversity, and the limited number of taxonomic keys available. Molecular data are indispensable for species delimitation; a multilocus phylogenetic analysis showed that most Asian Lactifluus species are not conspecific with morphologically similar species present on other continents. In particular, Korea has misused European and North American Lactifluus names. In this study, we evaluated the taxonomy of Lactifluus in Korea using both morphological and multilocus molecular (ITS, nrLSU, rpb1, and rpb2) data. We examined 199 Lactifluus specimens collected between 1980 and 2016, and a total of 24 species across the four Lactifluus subgenera were identified. All Korean species are distinct and clearly separated from European and North American species. Five taxa corresponded to previously described species from Asia and the remaining 19 taxa are confirmed as new species. Herein, we provide keys to the Korean Lactifluus species within their subgenera, molecular phylogenies, a summary of diversity, and detailed description of the new species.

Multivariate Analysis of Morphological Variation in Accessions of Aegilops crassa from Iran

2007 ◽  
Vol 10 (7) ◽  
pp. 1126-1129 ◽  
Author(s):  
M. Ranjbar ◽  
M.R. Naghavi ◽  
A. Zali ◽  
M.J. Aghaei
Keyword(s):  
Multivariate Analysis ◽  
Morphological Variation ◽  
Aegilops Crassa

scholarly journals Multivariate analysis of morphological variation in enset (Ensete ventricosum (Welw.) Cheesman) reveals regional and clinal variation in germplasm from south and south western Ethiopia

2018 ◽  
Vol 12 (12) ◽  
pp. 1849-1858 ◽  
Author(s):  
Zerihun Yemataw ◽  
◽  
Kassahun Tesfaye ◽  
Murray Grant ◽  
David J. Studholme ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Morphological Variation ◽  
Clinal Variation ◽  
Ensete Ventricosum ◽  
Western Ethiopia

Multivariate Analysis of Morphological Variation in Two Cryptic Species of Sancassania (Acari: Acaridae) from Costa Rica

2004 ◽  
Vol 97 (2) ◽  
pp. 322-345 ◽  
Author(s):  
Pavel B. Klimov ◽  
Mariam Lekveishvili ◽  
Ashley P.G. Dowling ◽  
Barry M. Oconnor
Keyword(s):  
Multivariate Analysis ◽  
Costa Rica ◽  
Cryptic Species ◽  
Morphological Variation

scholarly journals Morfological Variation of Endemic Fish Rainbow Celebensis (Telmatherina celebensis Boulenger) in Lake Towuti, South Sulawesi

2007 ◽  
Vol 3 (2) ◽  
pp. 5
Author(s):  
S.H. Nasution ◽  
. Sulistiono ◽  
D.S. Sjafei ◽  
G.S. Haryani
Keyword(s):  
Multivariate Analysis ◽  
Morphological Variation ◽  
World Heritage ◽  
Fish Population ◽  
Morphometric Character ◽  
Pectoral Fin ◽  
Male And Female ◽  
South Sulawesi ◽  
Endemic Fish ◽  
Lake Towuti

<p>Rainbow Celebensis <em>(Telmatherina celebensis </em>Boulenger) is one of endemic fish is a part of richness of biodiversity and world heritage in Lake Towuti. Rainbow Celebensis have beautiful colour especially in male, so that it is an economically and potentially as ornamental freshwater fish. It should be protected from threats because to fear decrease offish population in nature. This research is to know morphological variation of endemic fish rainbow Celebensis based on standard morphometric character in several stations. This research is conducted in Lake Towuti, South Sulawesi from March 2002 until April 2003 in four stations were I: Bakara Cape, II: inlet of Lake Towuti for River Tominanga, III: Loeha Island, IV: outlet of Lake Towuti to River Hola-hola. Sample were collected using experimental gillnet sized of <em>3A, </em>1, <em>lA, </em>and <em>VA </em>inch. Measuring offish standard morphometric character to be down on Kottelat <em>et al. </em>(1993) with modification covering 14 characters. The result of univariate and multivariate analysis towards standard morphometric character, could be said that male and female at I, II, III, and IV station is same tendency or to be deacended from one fish population. The characteristic to have influence of male are body hight and length from mouth to first pectoral fin, whereas in female are forskal length, total length, and basic length of second pectoral fin.</p> <p>Key words: Morphological variation. <em>Telmatherina celebensis, </em>lake Towuti.</p> <p> </p> <p>ABSTRAK</p> <p>Rainbow Selebensis adalah salah satu jenis ikan endemik dan merupakan bagian dari kekayaan sumberdaya hayati dan <em>world heritage, </em>yang terdapat di Danau Towuti. Rainbow Selebensis memiliki warna tubuh yang indah, terutama pada ikan jantan sehingga ikan tersebut berpotensi sebagai ikan hias air tawar yang bernilai ekonomis. Ikan ini perlu dilindungi dari ancaman kepunahan karena dikhawatirkan akan terjadi penurunan populasi ikan tersebut di alam. Penelitian ini bertujuan untuk melihat variasi morfologi ikan rainbow Selebensis berdasarkan karakter morfometrik baku pada beberapa stasiun. Penelitian dilakukan di perairan Danau Towuti, Sulawesi Selatan dari bulan Maret 2002 hingga April 2003 pada empat stasiun, yaitu I: Tanjung Bakara, II: <em>inlet </em>Danau Towuti yang berasal dari Sungai Tominanga, III: Pulau Loeha, dan IV: <em>outlet </em>Danau Towuti yang mengalir ke Sungai Hola-hola. Sampel ikan diperoleh dengan menggunakan jaring insang eksperimen <em>(experimental gillnet) </em>terdiri dari empat ukuran mata jaring yaitu <em>3A </em>, 1, <em>VA </em>. dan <em>VA </em>inci. Pengukuran karakter morfometrik ikan menggunakan metode baku yang mengacu pada Kottelat <em>et al. </em>(1993) yang dimodifikasi yang meliputi 14 karakter. Berdasarkan hasil analisis univariat dan multivariat terhadap karakter morfometrik baku di setiap stasiun, dapat dikatakan bahwa ikan jantan dan betina pada stasiun I, II, III, dan IV cenderung sama atau berasal dari satu kelompok populasi ikan. Karakter yang paling berpengaruh pada ikan jantan dicirikan oleh tinggi badan dan panjang dari mulut ke sirip punggung pertama, sedangkan pada ikan betina dicirikan oleh karakter panjang forskal, panjang total, dan panjang dasar sirip punggung kedua.</p> Kata kunci: Variasi morfologis. <em>Telmatherina celebensis, </em>Danau Towuti

Ceratozamia sanchezae (Zamiaceae): a new cycad species from Chiapas Highlands (Mexico)

Phytotaxa ◽  
2021 ◽  
Vol 500 (3) ◽  
pp. 201-216
Author(s):  
JOSÉ SAID GUTIÉRREZ-ORTEGA ◽  
MIGUEL A. PÉREZ-FARRERA ◽  
ANDREW P. VOVIDES ◽  
ANGÉLICA CHÁVEZ-CORTÁZAR ◽  
SERGIO LÓPEZ ◽  
...  
Keyword(s):  
Morphological Variation ◽  
Population Differentiation ◽  
Species Delimitation ◽  
Species Complex ◽  
Herbarium Specimens ◽  
New Taxon ◽  
Linear Discriminant ◽  
Discriminant Analyses ◽  
Male Cones ◽  
Adult Plants

The taxonomic classification within the Neotropical cycad genus Ceratozamia (Zamiaceae) has been a challenging task because cohorts of morphological variation in association with conspicuous geographic discontinuities that delimit species are not always easy to observe. Ceratozamia robusta is one example. Although previous studies have suggested that C. robusta presents an unusually high morphological variation across populations, this variation remains unquantified. In particular, we noticed that herbarium specimens from populations in the region Los Altos de Chiapas (Chiapas Highlands) that have been considered as C. robusta notably differ from the rest of the typical C. robusta forms by having narrower leaflets and fewer prickles on the petioles. Thus, we asked whether the populations in the Chiapas Highlands correspond to C. robusta as currently circumscribed. We examined the variation of ten leaf and trunk traits of 97 adult plants from six populations of C. robusta. Variation among the ten traits was significantly differentiated across populations, and such variation is correlated with elevation. Pairwise population differentiation tests and linear discriminant analyses clearly separated three groups: 1) populations similar to the neotype of C. robusta occur at mid-elevations in Chiapas, 2) a large C. robusta form occurs at low elevations in Belize, and 3) populations in the Chiapas Highlands that differ from both. The latter have fewer leaves and leaflets, shorter rachis, arched leaves in mature plants, petioles sparsely armed with thin prickles, smaller male cones, and juvenile forms more similar to those of the C. miqueliana species complex. These results suggest that the populations from the Chiapas Highlands represent a new taxon, here described as Ceratozamia sanchezae. This study highlights the importance of quantifying morphological variation across cycad populations to identify the species delimitation in complex groups.

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