Silicified trilobites of the genus Sphaerocoryphe from the Middle Ordovician of Virginia

1997 ◽  
Vol 34 (6) ◽  
pp. 770-788 ◽  
Author(s):  
Ronald P. Tripp ◽  
David M. Rudkin ◽  
William R. Evitt
Keyword(s):  
Similar Species ◽  
Middle Ordovician ◽  
Dimorphic Species ◽  
Subjective Synonym

Two similar species of Sphaerocoryphe, Sphaerocoryphe gemina sp.nov. and Sphaerocoryphe longispina sp.nov., from the Edinburg Formation (Blackriveran) of northwest Virginia are described. The most conspicuous differences lie in the pygidia. The protaspis closely resembles that of Ceraurinella; transitory pygidia are allocated to degrees one to eight, and the first appearance of the great spines provides a useful marker. Two ontogenetic series can be recognized, culminating in the two adult morphologies, and ruling out the possibility of a single dimorphic species. There are two profixigenal spines in meraspid cranidia up to 2.5 mm in sagittal length, one pair in larger cranidia of both species. The smallest hypostome possesses two lateral spines, later reduced to one. Hemisphaerocoryphe Reed is considered a junior subjective synonym of Sphaerocoryphe Angelin. The 29 named species are compared.

Nucularcidae: a new family of palaeotaxodont Ordovician pelecypods (Mollusca) from North America and Australia

2007 ◽  
Vol 44 (10) ◽  
pp. 1479-1501 ◽  
Author(s):  
John Pojeta Jr. ◽  
Christopher A Stott
Keyword(s):  
New Species ◽  
Type Species ◽  
New Genus ◽  
Late Ordovician ◽  
Eastern Canada ◽  
Middle Ordovician ◽  
New Family ◽  
Central Australia ◽  
Northeastern Usa ◽  
Subjective Synonym

The new Ordovician palaeotaxodont family Nucularcidae and the new genus Nucularca are described. Included in Nucularca are four previously described species that have taxodont dentition: N. cingulata (Ulrich) (the type species), N. pectunculoides (Hall), N. lorrainensis (Foerste), and N. gorensis (Foerste). All four species are of Late Ordovician (Cincinnatian Katian) age and occur in eastern Canada and the northeastern USA. Ctenodonta borealis Foerste is regarded as a subjective synonym of Nucularca lorrainensis. No new species names are proposed. The Nucularcidae includes the genera Nucularca and Sthenodonta Pojeta and Gilbert-Tomlinson (1977). Sthenodonta occurs in central Australia in rocks of Middle Ordovician (Darriwilian) age. The 12 family group names previously proposed for Ordovician palaeotaxodonts having taxodont dentition are reviewed and evaluated in the Appendix.

An interesting sexually dimorphic species, Neoribates isabelaensis sp. nov. (Acari, Oribatida, Parakalummidae) with remarks on sexual dimorphism in Oripodoidea 

Zootaxa ◽  
2017 ◽  
Vol 4347 (1) ◽  
pp. 94
Author(s):  
BADAMDORJ BAYARTOGTOKH ◽  
SERGEY G. ERMILOV ◽  
LEONILA CORPUZ-RAROS
Keyword(s):  
Sexual Dimorphism ◽  
Posterior Part ◽  
The Philippines ◽  
Similar Species ◽  
Sexually Dimorphic ◽  
The Family ◽  
Pheromonal Communication ◽  
Large Round ◽  
Dimorphic Species ◽  
A New Species

A new species Neoribates isabelaensis sp. nov. showing an interesting sexual dimorphism is described from bamboo litter on Luzon Island in the Philippines. This species is unique among other species of Neoribates in the structure of the posterior part of notogaster in males, which has a large round concavity bearing a pair of large sacculi S3. The specific function of this structure is not yet known, but the found sexual dimorphism is presumably involved in pheromonal communication allowing rapid sperm transfer. This is the fourth Neoribates species displaying sexually dimorphic characters. Additionally, Neoribates isabelaensis sp. nov. differs from the morphologically most similar species, Neoribates barbatus Hammer, 1968, by its smaller body size, pointed rostrum, long and setiform bothridial setae and the localization of notogastral setae h1 and h2, which insert close to each other. Further, we discussed all cases of sexual dimorphism in the family Parakalummidae as well as other related groups of Oripodoidea, and the possible function of these modifications. 

Systematic and taxomonic revaluation of four little known Asian agamid species, Calotes kingdonwardi Smith, 1935, Japalura kaulbacki Smith, 1937, Salea kakhienensis Anderson, 1879 and the monotypic genus Mictopholis Smith, 1935 (Reptilia: Agamidae)

Zootaxa ◽  
2010 ◽  
Vol 2514 (1) ◽  
pp. 1 ◽  
Author(s):  
STEPHEN MAHONY
Keyword(s):  
Morphological Characters ◽  
Primary Objective ◽  
External Morphology ◽  
Range Extension ◽  
Similar Species ◽  
Monotypic Genus ◽  
North West ◽  
Systematic Status ◽  
Subjective Synonym

The systematic status of many Asian Draconine agamids has long been in dispute. Herein, four such species, Mictopholis austeniana, Japalura kaulbacki, Calotes kingdonwardi and Salea kakhienensis are examined on the basis of external morphological characters. The monotypic genus Mictopholis was compared to other Asian Draconine genera and found to be indistinguishable from Pseudocalotes, with which it is here considered a synonym. Japalura kaulbacki is compared to other members of the genus Japalura as well as other similar species. Based on external morphology it is found to be separable from Japalura and conspecific with Calotes kingdonwardi, under which it is considered a junior subjective synonym. Salea kakhienensis is redefined morphologically based on nontype material and shown to represent a close member of this group. C. kingdonwardi is most similar to Salea kakhienensis both of which share a complement of characters with M. austeniana. The generic placement of S. kakhienensis relative to Salea, both with strongly overlapping synapomorphic characters is briefly discussed with respect to biogeographical implications that strongly support the exclusion of this species from the genus. Mictopholis austeniana, Calotes kingdonwardi and Salea kakhienensis are redescribed in detail and transferred to Pseudocalotes. The inclusion of these three species provides a generic range extension of approximately 800 km north-west of the previously considered range. The nomen Oriocalotes discolor is considered a primary objective synonym of Pseudocalotes kakhienensis new comb. and the systematic status of Calotes kingdonwardi bapoensis is briefly discussed.

Review of the trilobites from the Middle Ordovician Barr Group, Girvan district, Scotland

1993 ◽  
Vol 84 (2) ◽  
pp. 87-102 ◽  
Author(s):  
R. P. Tripp
Keyword(s):  
New Species ◽  
North American ◽  
Close Relationships ◽  
Growth Stages ◽  
Middle Ordovician ◽  
Stage Of Development ◽  
Size And Morphology ◽  
One New Species ◽  
General Stage ◽  
Subjective Synonym

AbstractCollections from the Barr Group (late Llanvirn to early Caradoc) of the Girvan district are described and occurrences of all trilobites from both the Barr and Albany groups are listed and their frequencies recorded. The close relationships with North American faunas are emphasised, and three Girvan and North American species are considered synonymous. One new species is described, Bevanopsis phyllisae. Pandaspinapyga is considered a junior subjective synonym of Acanthoparypha. The possibility that Alwynulus may be an aberrant staurocephalid is discussed.Growth stages of several genera are illustrated; some show unexpectedly large differences in size and morphology in comparison with North American silicified species at the same general stage of development.

The Lower Ordovician (upper Floian) bathyurid trilobite Aponileus Hu, with species from Utah, Texas, and Greenland

Zootaxa ◽  
2012 ◽  
Vol 3293 (1) ◽  
pp. 1 ◽  
Author(s):  
JONATHAN M. ADRAIN ◽  
NEO E. B. McADAMS
Keyword(s):  
Phylogenetic Analysis ◽  
Type Material ◽  
Similar Morphology ◽  
Middle Ordovician ◽  
Sister Pair ◽  
Lower Ordovician ◽  
Subjective Synonym

The previously monotypic bathyurid trilobite Aponileus Hu, 1963, was known only from poorly preserved material of itstype species, A. latus, and was interpreted as a junior subjective synonym of Psephosthenaspis Whittington. New speciesfrom the upper Floian (Blackhillsian) Fillmore Formation of western Utah belong to Aponileus and help demonstrate thatthe genus is an entirely Lower Ordovician (upper Floian) clade phylogenetically separate from the Middle Ordovician(Dapingian) Psephosthenaspis. Species of either group have broadly similar morphology, but the species of Psephosthe-naspis which most closely resembles those of Aponileus is the youngest and most derived member, and the similarities areconvergent. Psephosthenaspis roots among a group of heavily tuberculate, mostly undescribed, upper Floian species, oneof which is briefly illustrated for comparison. The species most resembling some species of Aponileus, P. glabrior, is il-lustrated on the basis of new silicified material which extends its range from the upper Juab Formation into the base of theKanosh Formation. New Blackhillsian species are A. laikaae (Fillmore Formation; Presbynileus ibexensis Zone), A. aasei(Fillmore Formation; probably Pseudocybele paranasuta Zone), A. belkaae, A. strelkaae, and A. ugolekae (all Wah WahFormation; "Pseudocybele nasuta Zone"). Aponileus? veterokae n. sp., from high in the "Pseudocybele nasuta Zone" ofthe Wah Wah Formation, is tentatively assigned. Bolbocephalus glaber Poulsen, 1927, from the Nunatami Formation ofnorthwest Greenland, is poorly known but is also a member of Aponileus, and is similar in morphology to A. latus and A.aasei; it is revised on the basis of reillustrated type material. Phylogenetic analysis indicates that A. laikaae is the basalspecies, followed by a sister pair of A. belkaae and A. strelkaae. These are sister to a pair of subclades, the sister pair of A. ugolekae and A.? veterokae, and an effaced group lacking genal spines including A. aasei, A. latus, and A. glaber.

scholarly journals Halyomorpha halys fixed as the type species of the genus Halyomorpha (Hemiptera: Heteroptera: Pentatomidae)

2021 ◽  
pp. 615-630
Author(s):  
Petr Kment ◽  
S. Salini ◽  
David Redei ◽  
David Rider
Keyword(s):  
Type Species ◽  
Southern China ◽  
Single Species ◽  
The Philippines ◽  
Valid Species ◽  
Halyomorpha Halys ◽  
Similar Species ◽  
Voucher Specimens ◽  
Heteroptera Pentatomidae ◽  
Subjective Synonym

The genus Halyomorpha Mayr, 1864 (Hemiptera: Heteroptera: Pentatomidae: Pentatominae: Cappaeini) was established based on a single species, Halys timorensis Westwood, 1837 (currently a junior subjective synonym of Halyomorpha picus (Fabricius, 1794)). The examination of the voucher specimens identifi ed as Halyomorpha timorensis by Mayr, a syntype of Halys timorensis, and syntypes of Pentatoma halys Stål, 1855 revealed that: i) Halyomorpha timorensis (Westwood), stat. restit., must be reinstated as a valid species, and not considered as a junior subjective synonym of H. picus; ii) Mayr’s specimens belong to two different species, Halyomorpha halys (Stål) and H. picus. The problem of double misidentification of the type species of Halyomorpha is resolved by action of the first revising author(s) according to the Article 70.3 of the ICZN (1999): we fi x here Pentatoma halys Stål, 1855 (= Halys timorensis sensu Mayr, nec Westwood) as the type species of Halyomorpha Mayr, 1864. A list of 36 valid species currently placed in Halyomorpha and their synonyms is compiled. We also issue a warning concerning the use of the citizen science approach for monitoring H. halys in Southeast Asia (which may also apply to other taxa): It is necessary to keep in mind that H. halys belongs to a group of habitually similar species (distributed from Pakistan and southern China to Indonesia and the Philippines) which cannot be identified with certainty without examination of their male genitalia; records merely based on observations or habitus photographs cannot be accepted as reliable.

Hasora mavis Evans, 1934 syn. n. is confirmed to be the female of H. leucospila leucospila (Mabille, 1891) (Hesperiidae, Coeliadinae) by DNA barcoding

Zootaxa ◽  
2019 ◽  
Vol 4695 (4) ◽  
pp. 391-393
Author(s):  
GUOXI XUE ◽  
ETSUO IKARI ◽  
YUTAKA INAYOSHI ◽  
MENG LI
Keyword(s):  
Dna Barcoding ◽  
Coi Gene ◽  
Sexually Dimorphic ◽  
Gene Sequences ◽  
Dimorphic Species ◽  
Subjective Synonym

Based upon the comparison of the 649 bp COI gene sequences, Hasora mavis Evans, 1934 is proved to be the female of a sexually dimorphic species, H. leucospila leucospila (Mabille, 1891), and thus treated as a junior subjective synonym of the latter. 

The identity of Postia lowei (Basidiomycota, Polyporales) and notes on related or similar species.

2014 ◽  
Vol 66 (1) ◽  
pp. 39-52
Author(s):  
Petr Vampola ◽  
Alexander Ordynets ◽  
Josef Vlasák
Keyword(s):  
Similar Species

Identification of sibling species in the genus Eucyclops from water-bodies of Ukraine and Russia using crossbreeding studies

2014 ◽  
Vol 25 (1-2) ◽  
pp. 61-68 ◽  
Author(s):  
V. I. Monchenko ◽  
L. P. Gaponova ◽  
V. R. Alekseev
Keyword(s):  
Cryptic Species ◽  
River Basin ◽  
Black Sea ◽  
Species Complex ◽  
River Basins ◽  
Water Bodies ◽  
Similar Species ◽  
Basin Water ◽  
Different Populations ◽  
Baltic Sea Basin

Crossbreeding experiments were used to estimate cryptic species in water bodies of Ukraine and Russia because the most useful criterion in species independence is reproductive isolation. The problem of cryptic species in the genus Eucyclops was examined using interpopulation crosses of populations collected from Baltic Sea basin (pond of Strelka river basin) and Black Sea basin (water-reservoires of Dnieper, Dniester and Danube rivers basins). The results of reciprocal crosses in Eucyclops serrulatus-group are shown that E. serrulatus from different populations but from water bodies belonging to the same river basin crossed each others successfully. The interpopulation crosses of E. serrulatus populations collected from different river basins (Dnipro, Danube and Dniester river basins) were sterile. In this group of experiments we assigned evidence of sterility to four categories: 1) incomplete copulation or absence of copulation; 2) nonviable eggs; 3) absence of egg membranes or egg sacs 4) empty egg membranes. These crossbreeding studies suggest the presence of cryptic species in the E. serrulatus inhabiting ecologically different populations in many parts of its range. The same crossbreeding experiments were carries out between Eucyclops serrulatus and morphological similar species – Eucyclops macruroides from Baltic and Black Sea basins. The reciprocal crossings between these two species were sterile. Thus taxonomic heterogeneity among species of genus Eucyclops lower in E. macruroides than in E. serrulatus. The interpopulation crosses of E. macruroides populations collected from distant part of range were fertile. These crossbreeding studies suggest that E. macruroides species complex was evaluated as more stable than E. serrulatus species complex.

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