scholarly journals Morphological, Anatomical and Cytological Studies of some Moss Species from Nigeria

2017 ◽  
Vol 9 (3) ◽  
pp. 404-413
Author(s):  
Abolade Oluremi BOLAJI ◽  
Julius Olaoye FALUYI
Keyword(s):  
Chromosome Numbers ◽  
Taxonomic Status ◽  
Knowledge Gaps ◽  
Moss Species ◽  
Anatomical Studies ◽  
First Time

Morphological, anatomical and chromosome studies of Hyophila crenulata C, Mull. Ex Dus, Thuidium gratum (P. Beauv) Jaeg., Barbula lambarenensis P. Vard.. Stereophyllum nitense Mitt. and Bryum coronatum Schwaegr from Nigeria, were carried out with a view to bridging some knowledge gaps that exist in their characterization and providing insightful information that could be useful in elucidating their taxonomic status. The morphological and anatomical studies revealed several gametophytic and sporophytic attributes which have not been previously reported and which were diagnostic for the moss species studied. The chromosome studies revealed the chromosome numbers to be Hyophila crenulata n = 4; Thuidium gratum n = 12 (10 + 2 m); Barbula lambarenensis n = 3; Stereophyllum nitense n = 9; and Bryum coronatum n = 10. The study concluded that the details of the morphological and anatomical descriptions as well as the chromosome numbers being reported for the first time in this study for the moss species studied could be very useful in their identification and taxonomic delimitation.

scholarly journals Towards a Natural Classification of Hyphodontia Sensu Lato and the Trait Evolution of Basidiocarps within Hymenochaetales (Basidiomycota)

2021 ◽  
Vol 7 (6) ◽  
pp. 478
Author(s):  
Xue-Wei Wang ◽  
Tom W. May ◽  
Shi-Liang Liu ◽  
Li-Wei Zhou
Keyword(s):  
Phylogenetic Analyses ◽  
Taxonomic Status ◽  
Ancestral State ◽  
Trait Evolution ◽  
Natural Classification ◽  
Multiple Loci ◽  
The Family ◽  
Phylogenetic Perspective ◽  
Taxonomic Framework ◽  
First Time

Hyphodontia sensu lato, belonging to Hymenochaetales, accommodates corticioid wood-inhabiting basidiomycetous fungi with resupinate basidiocarps and diverse hymenophoral characters. Species diversity of Hyphodontia sensu lato has been extensively explored worldwide, but in previous studies the six accepted genera in Hyphodontia sensu lato, viz. Fasciodontia, Hastodontia, Hyphodontia, Kneiffiella, Lyomyces and Xylodon were not all strongly supported from a phylogenetic perspective. Moreover, the relationships among these six genera in Hyphodontia sensu lato and other lineages within Hymenochaetales are not clear. In this study, we performed comprehensive phylogenetic analyses on the basis of multiple loci. For the first time, the independence of each of the six genera receives strong phylogenetic support. The six genera are separated in four clades within Hymenochaetales: Fasciodontia, Lyomyces and Xylodon are accepted as members of a previously known family Schizoporaceae, Kneiffiella and Hyphodontia are, respectively, placed in two monotypic families, viz. a previous name Chaetoporellaceae and a newly introduced name Hyphodontiaceae, and Hastodontia is considered to be a genus with an uncertain taxonomic position at the family rank within Hymenochaetales. The three families emerged between 61.51 and 195.87 million years ago. Compared to other families in the Hymenochaetales, these ages are more or less similar to those of Coltriciaceae, Hymenochaetaceae and Oxyporaceae, but much older than those of the two families Neoantrodiellaceae and Nigrofomitaceae. In regard to species, two, one, three and 10 species are newly described from Hyphodontia, Kneiffiella, Lyomyces and Xylodon, respectively. The taxonomic status of additional 30 species names from these four genera is briefly discussed; an epitype is designated for X. australis. The resupinate habit and poroid hymenophoral configuration were evaluated as the ancestral state of basidiocarps within Hymenochaetales. The resupinate habit mainly remains, while the hymenophoral configuration mainly evolves to the grandinioid-odontioid state and also back to the poroid state at the family level. Generally, a taxonomic framework for Hymenochaetales with an emphasis on members belonging to Hyphodontia sensu lato is constructed, and trait evolution of basidiocarps within Hymenochaetales is revealed accordingly.

Contribution to the knowledge of the oribatid mite genus Leptotocepheus (Acari, Oribatida, Otocepheidae)

2018 ◽  
Vol 23 (11) ◽  
pp. 2269
Author(s):  
Sergey G. Ermilov ◽  
Maria Minor
Keyword(s):  
New Species ◽  
New Zealand ◽  
Oribatid Mite ◽  
Taxonomic Status ◽  
Identification Key ◽  
First Time ◽  
Australasian Region ◽  
A New Species ◽  
Mite Genus

The otocepheid oribatid mite genus Leptotocepheus Balogh, 1961 is recorded in the Australasian region for the first time. The taxonomic status of the genera Leptotocepheus Balogh, 1961 and Longocepheus Balogh & Mahunka,1966 is discussed, resulting in the recognition of Longocepheus as a subgenus (stat. nov.) of Leptotocepheus and the following recombinations: Leptotocepheus (Longocepheus) australis (Balogh & Mahunka, 1966) comb. nov., Leptotocepheus (Longocepheus) globosus (Grobler, 1995) comb. nov., Leptotocepheus (Longocepheus) longus (Balogh, 1961) comb. nov., Leptotocepheus (Longocepheus) youngai (Mahunka, 1984) comb. nov. A new species of Leptotocepheus (Longocepheus) is described from New Zealand, Leptotocepheus (Longocepheus) neozealandicus sp. nov., which differs from other species of the subgenus by the presence of short, slightly developed prodorsal costulae. Revised generic and subgeneric diagnoses, an identification key and distributions for the known taxa of Leptotocepheus are presented.

Life history and taxonomy of two populations of ligulate Desmarestia (Phaeophyceae) from Chile

1986 ◽  
Vol 64 (12) ◽  
pp. 2948-2954 ◽  
Author(s):  
M. E. Ramirez ◽  
D. G. Müller ◽  
A. F. Peters
Keyword(s):  
South Africa ◽  
Life History ◽  
Chromosome Numbers ◽  
Taxonomic Status ◽  
Southern Chile ◽  
Northeast Pacific ◽  
Laboratory Cultures ◽  
Monoecious Population ◽  
Two Populations

Two populations of broad-bladed (ligulate) Desmarestia from central and southern Chile were studied in laboratory cultures. They differ in sporophyte morphology and gametophyte characters (monoecism versus dioecism). The dioecious population is found to be related to D. firma from South Africa and D. munda from the northeast Pacific, while the taxonomic status of the broad-bladed monoecious population is left undetermined. In both populations sporophytes originate after fertilization as well as by apomixis. Chromosome numbers alternate between ca. 23 and ca. 46. Evidence is presented that spermatozoids of the dioecious Desmarestia can develop into sporophytes (androgenesis or ephebogenesis).

scholarly journals New Contribution to the Knowledge on the Chromosome Numbers of Turkish Cerambycidae (Coleoptera)

2021 ◽  
Vol 69 (2) ◽  
pp. 93-99
Author(s):  
Yavuz Koçak ◽  
Elmas Yağmur
Keyword(s):  
Chromosome Number ◽  
Sex Determination ◽  
Chromosome Numbers ◽  
Chromosome Count ◽  
Chromosomal Number ◽  
The Poor ◽  
Karyological Data ◽  
First Time

Information on the karyotypes of Turkish species of Cerambycidae is scanty. Our study contributes to the knowledge of the karyological data (chromosomal number and mechanism of sex determination) of five Turkish longicorn beetles; karyotypes of four taxa, one endemic, are described for the first time and for the remaining one, Purpuricenus budensis (Götz, 1783), the previously published chromosome count is confirmed. The chromosome number of Purpuricenus desfontainii inhumeralis Pic, 1891 and Purpuricenus budensis (Götz, 1783) (Cerambycinae, Trachyderini) was found to be 2n = 28 (13 + Xyp); Clytus rhamni Germar, 1817 and Plagionotus floralis (Pallas, 1773) (Cerambycinae, Clytini) 2n = 20 (9 + Xyp); and the endemic Dorcadion triste phrygicum Peks, 1993 (Lamiinae, Dorcadionini) 2n = 24 (11 + Xyp). In view of the paucity of data available until now, our study is important for both to improve the poor karyological knowledge of Turkish Cerambycidae and to provide an incentive for other researchers.

scholarly journals Three New distributional records of Pen Shells (Bivalvia: Pinnidae) from Seagrass beds of Palk Bay Area in Tamil Nadu

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Chelladurai Stella ◽  
Packiam Paul ◽  
Chelladurai Ragunathan
Keyword(s):  
Tamil Nadu ◽  
Taxonomic Status ◽  
Intertidal Area ◽  
Meristic Characters ◽  
Hard Substratum ◽  
Bay Area ◽  
The Family ◽  
Tidal Area ◽  
Palk Bay ◽  
First Time

The new occurrence of Three species of bivalves from Pinnidae family  is recorded for the first time from Palk Bay area based on a live and dead shells collected from the Intertidal area . All the three species are under the family of  Pinnidae, Pinna bicolor, Pinna deltodes and Pinna incurva . In seagrass bed of Thondi Coast, all the species of Pen shells Pinna bicolor, Pinna deltodes and Pinna incurva  were embedded in muddy sand and found associated with seagrasses at inter-tidal area. It was also found buried in hard substratum associated with living zoanthids and soft coral. The collected specimens were identified as, (1) Pinna bicolor, (2) Pinna deltodes and (3) Pinna Incurva by using both morphometric and meristic characters. The paper described the taxonomic status and the description of the three species of bivalves collected from Palk Bay areas.

scholarly journals On two species of Riocypris (Crustacea, Ostracoda) from northern Patagonia and their relation to Eucypris fontana: implications in paleoenvironmental reconstructions

2018 ◽  
Vol 96 (8) ◽  
pp. 801-817 ◽  
Author(s):  
C.A. Coviaga ◽  
A.P. Pérez ◽  
L.Y. Ramos ◽  
P. Alvear ◽  
G.C. Cusminsky
Keyword(s):  
Sexual Dimorphism ◽  
Morphometric Analysis ◽  
Indicator Species ◽  
Taxonomic Status ◽  
Geometric Morphometric ◽  
Comparative Analyses ◽  
Northern Patagonia ◽  
Geometric Morphometric Analysis ◽  
The Individual ◽  
First Time

Two species of ostracods new to Patagonia, Argentina, are described. One of them, Riocypris whatleyi sp. nov., is described for the first time, and the second, Riocypris sarsi (Daday, 1902) comb. nov., is reallocated from genus Eucypris to genus Riocypris. Inter- and intra-specific variations in shape, size, and sexual dimorphism were evaluated based on geometric morphometric analysis. Moreover, morphological and morphometric comparative analyses were applied to re-examine living and quaternary specimens recovered from previous studies. Based on these results, a generic reassignment for the Patagonian Eucypris fontana (Jurine, 1820) into the genus Riocypris is proposed. Contributing to the knowledge on the systematic and autecology of this enigmatic species, widely distributed in Patagonia and frequently used in paleolimnological reconstructions, generates science-based evidence for their use as indicator species. Additionally, our results emphasize the usefulness of studying the living representatives (i.e., with valves and appendages) for elucidating the taxonomic status of the individual specimens, especially those present in paleontological records and used as bioproxies in paleolimnological studies.

Chromosome studies on African plants. 9. Chromosome numbers in Ehrharta (Poaceae: Ehrharteae)

Bothalia ◽  
1989 ◽  
Vol 19 (1) ◽  
pp. 125-132 ◽  
Author(s):  
J. J. Spies ◽  
E. J. L. Saayman ◽  
S. P. Voges ◽  
G. Davidse
Keyword(s):  
Chromosome Number ◽  
Ploidy Level ◽  
Chromosome Numbers ◽  
Basic Chromosome Number ◽  
B Chromosomes ◽  
Basic Chromosome ◽  
Cytogenetic Studies ◽  
African Plants ◽  
First Time

Cytogenetic studies of 53 specimens of 14 species of the genus  Ehrharta Thunb. confirmed a basic chromosome number of 12 for the genus. Chromosome numbers for 13 species are described for the first time. The highest ploidy level yet observed in the genus (2n = lOx = 120) is reported for E. villosa var.  villosa. B chromosomes were observed in several specimens of four different species.

Additional records of osmiine bees (Hymenoptera: Megachilidae: Osmiini) from Siberia

Zootaxa ◽  
2019 ◽  
Vol 4563 (1) ◽  
pp. 163
Author(s):  
MAXIM YU. PROSHCHALYKIN ◽  
ANDREAS MÜLLER
Keyword(s):  
Taxonomic Status ◽  
First Time

In addition to a previously published study about Siberian osmiine bees, we here further report records of 19 rarely collected and little known species. Twenty-seven species of osmiine bees are currently known from Siberia. Hoplitis beijingensis Wu, 1987, H. kaszabi Tkalců, 2000, and H. inconspicua Tkalců, 1995 are recorded for the first time for Russia and Hoplitis maritima (Romankova, 1985), Osmia inermis (Zetterstedt, 1838), and O. disjuncta Tkalců, 1995 are new to Siberia. Two species, Hoplitis fulva (Eversmann, 1852) and H. papaveris (Latreille, 1799), are excluded from the list of Siberian bees. The male of Hoplitis daurica (Radoszkowski, 1887) is described for the first time, the taxonomic status of Osmia ephippiata Smith, 1879 is discussed and a lectotype is designated for Hoplitis scita (Eversmann, 1852). 

New data on life cycles for three species of Fellodistomidae (Digenea) in the White Sea

2020 ◽  
Vol 94 ◽  
Author(s):  
D. Krupenko ◽  
A. Uryadova ◽  
A. Gonchar ◽  
G. Kremnev ◽  
V. Krapivin
Keyword(s):  
Intermediate Host ◽  
White Sea ◽  
Taxonomic Status ◽  
Life Cycles ◽  
The White Sea ◽  
Arctic Seas ◽  
Buccinum Undatum ◽  
The Family ◽  
Second Intermediate Host ◽  
First Time

Abstract Few digeneans of the family Fellodistomidae are known from the Russian Arctic seas. The taxonomic status of these species, their life cycles and host range raised recurrent questions, some of which remain unanswered. To revise the species composition and life cycles of fellodistomids in the White Sea, we searched for them in several known and suspected hosts: wolffish, flatfishes (definitive), gastropods of the family Buccinidae (second intermediate) and protobranch bivalves (first intermediate). Species identification was based both on morphology and 28S ribosomal RNA gene sequences. We found Fellodistomum agnotum in the White Sea for the first time. Buccinum undatum was proved to be intermediate host of both F. agnotum and Fellodistomum fellis, and metacercariae of F. fellis were registered from two more buccinid species: Buccinum scalariforme and Neptunea despecta. We also found metacercariae of F. agnotum and F. fellis producing eggs in the second intermediate host. Two fellodistomids were found in protobranch bivalves: sporocysts and cercariae of Steringophorus furciger in Nuculana pernula, and sporocysts with large furcocercous cercariae in Ennucula tenuis. The latter were identified as F. agnotum by molecular analysis; thus, the entire life cycle of this species was reconstructed.

Nomenclatural issues in the orchid bees (Hymenoptera: Apidae: Euglossina) and an updated catalogue

Zootaxa ◽  
2011 ◽  
Vol 3006 (1) ◽  
pp. 1 ◽  
Author(s):  
ANDRÉ NEMÉSIO ◽  
CLAUS RASMUSSEN
Keyword(s):  
Taxonomic Status ◽  
Orchid Bees ◽  
Orchid Bee ◽  
The Status ◽  
First Time ◽  
Subjective Synonym

The taxonomic status (or the taxonomic status of the onomatophores) of seven nomina are revised: Eulaema meriana (Olivier, 1789), Euglossa piliventris Guérin-Méneville, 1844, Exaerete appendiculata (Romand, 1849), Exaerete subcornuta (Romand, 1849), Eufriesea danielis (Schrottky, 1907), Euglossa fimbriata Moure, 1968, and Eufriesea yepezi (Moure, 2000). Lectotype is designated for Euglossa piliventris Guérin-Méneville, 1844. Neotypes are designated for Apis meriana Olivier, 1789 and Apis dimidiata Fabricius, 1793 based on the same specimen and A. dimidiata Fabricius, 1793 became an objective synonym of A. meriana Olivier, 1789. Chrysantheda subcornuta Romand, 1849 is shown to be a senior objective synonym of Chrysantheda appendiculata Romand, 1849 and their synonymy under Exaerete dentata (Linnaeus, 1758) is questioned and discussed. Eumorpha combinata danielis Schrottky, 1907 is confirmed as a junior subjective synonym of Eufriesea auriceps (Friese, 1899), but the status of its onomatophore is reconsidered. Moreover, a long overlooked Euglossa dentata var. maxima Romand, 1849, nom. nud. and Euplusia yepezi Moure, 2000, nom. nud. are discussed for the first time. Both nomina Euglossa fimbriata Moure, 1968 and Euglossa fimbriata Rebêlo & Moure, 1996are available, but the latter is permamently invalid as a junior primary homonym of the former. An updated catalogue of all orchid bee nomina is also provided.

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