Revised generic delimitations for Oxypolis
 and Ptilimnium
 (Apiaceae) based on leaf morphology, comparative fruit anatomy, and phylogenetic analysis of nuclear rDNA ITS and cpDNA trnQ
-trnK
 intergenic spacer sequence data

SUMMARYThe taxonomic history of members of the 37-collar-spine group within the genus Echinostoma has been very confused. We obtained DNA sequence data from the nuclear rDNA ITS1, 5·8S and ITS2 of 7 nominal species belonging to this group, Echinostoma trivolvis (Cort, 1914), E. revolution (Frölich, 1802), E. caproni Richard, 1964, E. liei Jeyarasasingam et al. 1972, E. paraensei Lie & Basch, 1967, two African isolates, E. sp.I and E. sp.II, and of one 28-collar-spined echinostome, E. hortense (Asada, 1926). Five of the eight species were clearly distinguishable using ITS data. Sequences from the remaining three taxa, E. caproni, E. sp.II and E. liei were identical to one another and the group containing these taxa was distant from other 37-collar-spine species on a phylogenetic tree. E. trivolvis and E. paraensei form a second, but less distinct group within the 37-collar-spine group. The resolution obtained using DNA sequencing will assist in the current reclassification of the group. It also provides a model for future work on sibling species.

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Nuclear rDNA ITS sequence data used to construct the first phylogeny of Vanguerieae (Rubiaceae)

Plant Systematics and Evolution ◽

10.1007/s006060200003 ◽

2002 ◽

Vol 230 (3-4) ◽

pp. 173-187 ◽

Cited By ~ 24

Author(s):

H. Lantz ◽

K. Andreasen ◽

B. Bremer

Keyword(s):

Sequence Data ◽

Its Sequence ◽

Nuclear Rdna ◽

Rdna Its

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Evaluation of Morphological Variation in the Lichen Diploschistes ocellatus (Ascomycota, Ostropales): Evidence from Nuclear rDNA ITS Sequence Data

Plant Biology ◽

10.1055/s-2000-7471 ◽

2000 ◽

Vol 2 (5) ◽

pp. 571-578 ◽

Cited By ~ 8

Author(s):

M. P. Martín ◽

K. Winka ◽

X. Llimona ◽

H. T. Lumbsch

Keyword(s):

Morphological Variation ◽

Sequence Data ◽

Its Sequence ◽

Nuclear Rdna ◽

Rdna Its

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Phylogenetic relationships in the Mediterranean Helichrysum (Asteraceae, Gnaphalieae) based on nuclear rDNA ITS sequence data

Australian Systematic Botany ◽

10.1071/sb03031 ◽

2004 ◽

Vol 17 (3) ◽

pp. 241 ◽

Cited By ~ 33

Author(s):

M. Galbany-Casals ◽

N. Garcia-Jacas ◽

A. Susanna ◽

L. Sáez ◽

C. Benedí

Keyword(s):

Sequence Data ◽

Cladistic Analysis ◽

Mediterranean Area ◽

Internal Transcribed Spacers ◽

Nuclear Rdna ◽

Generic Delimitation ◽

Rdna Its ◽

The Mediterranean ◽

Sectional Classification

The internal transcribed spacers ITS1 and ITS2 of the nuclear rDNA were sequenced for 41 Helichrysum species (Gnaphalieae), focusing on the Mediterranean group of species, together with eight representatives of other genera of the Gnaphalieae, in order to check the hypothesised monophyly of the Mediterranean Helichrysum group and the correspondence of the sequence data with its traditional sectional classification. The cladistic analysis of sequence data supports monophyly of the Mediterranean Helichrysum excluding H. frigidum and H. montelinasanum. The traditional classification of the Mediterranean species into two sections, Helichrysum and Virginea, is not supported, whereas a group constituted by species from the west Mediterranean area is shown as a moderately supported monophyletic clade in the strict consensus tree. Other results also show and confirm the complexity, still not satisfactorily resolved, of the Helichrysum generic delimitation: Pseudognaphalium luteoalbum appears merged in Helichrysum whereas Helichrysum dasyanthum appears more related to Anaxeton laeve than to any Helichrysum species.

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Geum sunhangii (Rosaceae), a new species from Hubei Province, China

PhytoKeys ◽

10.3897/phytokeys.156.37277 ◽

2020 ◽

Vol 156 ◽

pp. 113-124

Author(s):

Zhen-Yu Lv ◽

Dai-Gui Zhang ◽

Xian-Han Huang ◽

Heng-Chang Wang ◽

Jing-Yuan Yang ◽

...

Keyword(s):

Phylogenetic Analysis ◽

New Species ◽

Internal Transcribed Spacer ◽

Nature Reserve ◽

Sequence Data ◽

Intergenic Spacer ◽

Hubei Province ◽

Terminal Leaflet ◽

National Nature Reserve ◽

A New Species

Geum sunhangii – first discovered in Shennongjia National Nature Reserve, Hubei Province, China – is described as a new species of Rosaceae. Compared to all known Chinese Geum species, the new species differs by possessing jointed styles, imbricate petals and a reniform radical leaf terminal leaflet. Most significantly, the jointed style is curved at an obtuse or a right angle. In addition, the inclusion of this species within the genus Geum was supported by phylogenetic analysis using the sequence data of a nuclear ribosomal internal transcribed spacer (nrITS) and a chloroplast trnL–trnF intergenic spacer. The new species was found to be closely related to G. rivale and G. aleppicum.

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