scholarly journals Revisiting the morphology and systematic placement of the enigmatic Cretaceous ommatid beetle Bukhkalius lindae (Coleoptera: Archostemata: Ommatidae)

2021 ◽  
Vol 61 ◽  
pp. e20216128
Author(s):  
Yan-Da Li ◽  
Di-Ying Huang ◽  
Chen-Yang Cai
Keyword(s):  
Type Specimen ◽  
Systematic Position ◽  
Burmese Amber ◽  
Missing Link ◽  
Separate Genus ◽  
Close Affinity

The systematic position of Bukhkalius lindae (Jarzembowski et al. 2017) from mid-Cretaceous Burmese amber is revised based on a re-examination of the type specimen. Our observation confirms that B. lindae lacks unique apomorphies of Tetraphalerus Waterhouse, in which it was originally placed, including complete antennal grooves and mushroom-shaped micro-tubercles. It is well justified to place it into a separate genus, i.e., Bukhkalius Kirejtshuk & Jarzembowski, 2020. The incomplete but distinct antennal grooves and the Tetraphalerus-like mouthparts of B. lindae suggest that it has a close affinity to Tetraphalerus. Therefore, B. lindae may represent a missing link bridging the morphological gap between extant ommatid subfamilies Tetraphalerinae and Ommatinae.

A close affinity of the enigmatic genus Stegocoleus with Lepidomma revealed by new fossil evidence (Coleoptera: Archostemata: Ommatidae)

2020 ◽  
Vol 3 (6) ◽  
pp. 632-640
Author(s):  
YAN-DA LI ◽  
ERIK TIHELKA ◽  
SHÛHEI YAMAMOTO ◽  
DI-YING HUANG ◽  
CHEN-YANG CAI
Keyword(s):  
New Species ◽  
Confocal Microscopy ◽  
Ventral Side ◽  
Systematic Position ◽  
Unique Combination ◽  
Burmese Amber ◽  
Close Affinity ◽  
Fossil Evidence ◽  
The Family ◽  
Two New Species

Stegocoleus Jarzembowski & Wang is an enigmatic genus in the family Ommatidae, known to date only from Burmese amber. This genus possesses a unique combination of characters, including antennal grooves on the ventral side of head, well-developed epipleural rims, and presence of separated procoxae, which makes its systematic position unclear. Here we report two new species of Lepidomma from mid-Cretaceous Burmese amber, L. longisquama sp. nov. and L. jarzembowskii sp. nov. Based on these well-preserved specimens and new morphological details revealed by widefield fluorescence and confocal microscopy, we discuss the morphological similarities between Lepidomma and the enigmatic Stegocoleus. We suggest that Stegocoleus is not a basal ommatid, but a highly derived form of ommatid beetles.

On the Morphology and Systematic Position of Echinopharynx, a New Genus of Bursate Nematode from Testudo tabulata

1925 ◽  
Vol 3 (1) ◽  
pp. 19-32
Author(s):  
Gobind Singh Thapar
Keyword(s):  
New Genus ◽  
Buccal Capsule ◽  
Systematic Position ◽  
Present Knowledge ◽  
Parasitic Fauna ◽  
Separate Genus ◽  
The Family ◽  
Common Genus ◽  
Anguis Fragilis ◽  
Improved Methods

Our present knowledge of the Strongylid parasites of reptiles is based primarily on Dujardin (1845), who refers all the forms along with those of other vertebrates under a common genus Strongylus, and described four species from the reptilian hosts. Since then our knowledge of parasitic fauna has considerably increased, and von Linstow (1878–89) gave an enlarged list under the same genus from reptiles and also a few under the genus Kalicephalus, Later, with improved methods of Nematode study the forms described were revised, and it was found necessary to split the genus Strongylus, and several groups of a diverse character were recognised. The genus Strongylus was thus split up into several genera, and some of them were removed from the family Strongylidæ. The form Strongylus dispar of Dujardin from the Anguis fragilis was removed into a separate genus, Oswaldocruzia and Strongylus auricularis, with its characters in the absence of buccal capsule and the bifid and trifid distal ends of the spicule seemed more closely allied to Trichostrongylidæ Leiper, and was also removed to the genus Oswaldocruzia.

scholarly journals The first fossil Coleoptera record from the Volyn Region, Ukraine, with description of a new Glesoconomorphus (Coleoptera, Mycteridae) in syninclusion with Winterschmidtiidae (Acari) and a key to species

ZooKeys ◽  
2021 ◽  
Vol 1068 ◽  
pp. 189-201
Author(s):  
Dmitry Telnov ◽  
Evgeny E. Perkovsky ◽  
Dmitry V. Vasilenko ◽  
Shûhei Yamamoto
Keyword(s):  
Type Specimen ◽  
Systematic Position ◽  
Late Eocene ◽  
Rovno Amber ◽  
Beetle Species ◽  
Key To Species ◽  
Fossil Species

Glesoconomorphus ekaterinaesp. nov. (Coleoptera, Mycteridae), representing the first ever fossil species of Coleoptera from the Volyn Region of Ukraine and the first mycterid from late Eocene Rovno amber, is described and illustrated. A key to species of the fossil mycterid genus Glesoconomorphus Alekseev, Pollock & Bukejs, 2019 is presented. The systematic position of Glesoconomorphus within Eurypinae J. Thomson, 1860 is briefly discussed. The oldest finding of phoretic Winterschmidtiidae Oudemans, 1923 mites, found on the type specimen of the new beetle species, is reported.

Lobithelphusa mexicana Rodriguez, 1982 (Decapoda: Pseudothelphusidae): a reassessment of key characters and systematics

Zootaxa ◽  
2019 ◽  
Vol 4586 (1) ◽  
pp. 151 ◽  
Author(s):  
JOSÉ LUIS VILLALOBOS-HIRIART ◽  
SEYIT A. KAMANLI ◽  
FERNANDO ÁLVAREZ ◽  
AMIN GARBOUT ◽  
PAUL F. CLARK
Keyword(s):  
Conservation Status ◽  
Good Condition ◽  
Glass Tube ◽  
Ct Scanning ◽  
Original Description ◽  
Type Specimen ◽  
Systematic Position ◽  
Southern Mexico ◽  
Male Specimen ◽  
History Museum

Lobithelphusa Rodriguez, 1982 is endemic to southern Mexico. Assigned to this monotypic genus is the freshwater pseudothelphusid crab, L. mexicana Rodriguez, 1982. The original description based on an old, dry, male specimen in the collections of the Natural History Museum, London, is brief and the crab was only partially figured. Lobithelphusa mexicana has subsequently never been recorded from Mexico and, consequently, the conservation status of this species is unknown. The type specimen has a complete, but detached left chela; is devoid of the left ambulatory pereiopods 1–3, with the fourth missing the carpus, propodus and dactylus; and its left first gonopod detached but retained in a glass tube kept adjacent to the crab. In spite of this damage the crab is still in remarkably good condition for a specimen registered in 1860. The purpose of this study is to apply computed tomography (CT) scanning techniques on the extant type, including its first gonopod, in order to provide detailed illustrations of the crab. These, in turn, shall be used to re-describe the species in order to help establish the current distribution status of L. mexicana in Mexico, and clarify its systematic position within the Pseudothelphusidae Ortmann, 1893. 

Maluti Mystery: A systematic review of Amietia vertebralis (Hewitt, 1927) and Strongylopus hymenopus (Boulenger, 1920) (Anura: Pyxicephalidae)

Zootaxa ◽  
2008 ◽  
Vol 1962 (1) ◽  
pp. 33-48 ◽  
Author(s):  
JEANNE TARRANT ◽  
MICHAEL J. CUNNINGHAM ◽  
LOUIS H. DU PREEZ
Keyword(s):  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Taxonomic Status ◽  
Original Description ◽  
Type Specimen ◽  
Systematic Position ◽  
Type Specimens ◽  
Morphological Examination ◽  
Species Type ◽  
Original Application

The taxonomic status of Amietia vertebralis and Strongylopus hymenopus, two frogs restricted to the Maluti-Drakensberg highlands in southern Africa, is unclear. Here, morphological examination and phylogenetic analyses elucidate the systematic position of these two species. Type specimens of both species were examined and compared with more recent collections to clarify their identity. These comparisons revealed discrepancies between the original application of these names and their current usage. The holotype and original description of A. vertebralis match specimens from an extant population at that species’ type locality that are currently assigned to S. hymenopus. Furthermore, the type specimen of S. hymenopus is of uncertain provenance and does not match well with either of the forms currently associated with these names. We assessed both intraspecific and interspecific variability using DNA sequence data. Broad sampling of the form currently assigned to A. vertebralis revealed very little genetic variation thereby dispelling the hypothesis that this is a compound taxon. The generic placement of both species within the family Pyxicephalidae was resolved using a combined dataset of mitochondrial 16S rDNA and nuclear RAG1 gene sequences. The form currently recognised as S. hymenopus was excluded from the otherwise monophyletic genus Strongylopus, and was placed instead within Amietia. Based on these data a revised application of both species names is recommended here. Populations currently assigned to Amietia vertebralis are referred to Amietia umbraculata and those attributed to Strongylopus hymenopus are referred instead to Amietia vertebralis.

First description of female of Haplosialodes liui Huang et al., 2016 (Megaloptera: Sialidae) from Cretaceous Burmese amber

Zootaxa ◽  
2017 ◽  
Vol 4258 (2) ◽  
pp. 172 ◽  
Author(s):  
XINGYUE LIU ◽  
XIUMEI LU ◽  
FANGYUAN XIA ◽  
BO WANG
Keyword(s):  
Systematic Position ◽  
Burmese Amber ◽  
First Time

A female of the alderfly species, Haplosialodes liui Huang et al., 2016, from the mid-Cretaceous Burmese amber is described for the first time. Systematic position of the genus Haplosialodes Huang et al., 2016 is briefly discussed. 

scholarly journals Notes on the Morphology and Systematic Position of Archaeolus Lin, 1986, from the Jurassic of South China (Coleoptera: Elateroidea)

Insects ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 876
Author(s):  
Yan-Da Li ◽  
Robin Kundrata ◽  
Di-Ying Huang ◽  
Chen-Yang Cai
Keyword(s):  
South China ◽  
Type Specimen ◽  
Systematic Position ◽  
Surface Sculpture ◽  
Click Beetle

The morphology of the Jurassic fossil Archaeolus funestus Lin, 1986, which was previously placed in the extinct click-beetle subfamily Protagrypninae (Coleoptera: Elateridae), is revised based on a re-examination of the type specimen. The validity of Protagrypninae is discussed and further questioned, partly based on the newly observed characters in A. funestus, including the surface sculpture of the mesoventrite. A possible Throscidae affinity of monotypic Archaeolus Lin, 1986, as suggested in a recent study, is further critically reviewed.

Pleuroceratos jiewenae sp. nov.: A new Cretaceous phloeostichid beetle (Coleoptera: Cucujoidea: Phloeostichidae)

2020 ◽  
Vol 3 (3) ◽  
pp. 248-259
Author(s):  
ERIK TIHELKA ◽  
DIYING HUANG ◽  
CHENYANG CAI
Keyword(s):  
Phylogenetic Analysis ◽  
Systematic Position ◽  
Disjunct Distribution ◽  
Diverse Group ◽  
Burmese Amber ◽  
Incertae Sedis ◽  
Early Diversification ◽  
The Family ◽  
Phylogenetic Affinities ◽  
A New Species

Elucidating the phylogenetic affinities of enigmatic fossils is crucial for resolving the early diversification of the superfamily Cucujoidea, a diverse group of polyphagan beetles whose relationships remain contentious. The systematic position of the Cretaceous genus Pleuroceratos known from Burmese amber has been uncertain; the genus was previously placed into Silvanidae, Sphindidae, and Cucujoidea incertae sedis. Here we describe a new species, Pleuroceratos jiewenae sp. nov., from mid-Cretaceous Burmese amber and conduct a formal phylogenetic analysis to elucidate the position of the genus. We recover Pleuroceratos as nested within the family Phloeostichidae, represented in the modern fauna by four genera of fungivorous subcortical beetles with a highly disjunct distribution range. Pleuroceratos beetles are the sole fossil members of Phloeostichidae known to date and indicate that the family begun to diversify by the mid-Cretaceous.

scholarly journals Revisiting the morphology of the Cretaceous ommatid beetle Clessidromma palmeri (Coleoptera: Archostemata: Ommatidae)

2021 ◽  
Vol 61 ◽  
pp. e20216195
Author(s):  
Yan-Da Li ◽  
Chen-Yang Cai
Keyword(s):  
New Genus ◽  
Type Specimen ◽  
Ventral Side ◽  
Burmese Amber ◽  
Diagnostic Characters

The morphology of Clessidromma palmeri Jarzembowski et al. from mid-Cretaceous Burmese amber is revised based on a reexamination of the type specimen. Contrary to previous studies, our observation confirms that Clessidromma has open procoxal cavities. The characters such as platform on the ventral side of head, modified metacoxae, and ridges on head and pronotum are suggested to be diagnostic characters for Clessidromma. Clessidromma zengi Kirejtshuk from the same deposit is transferred into a new genus, as Kirejtomma zengi comb. nov.

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