The hydranth of Salacia tetracythara (Cnidaria: Hydrozoa: Sertulariidae) and its modified tentacles

2008 ◽  
Vol 88 (8) ◽  
pp. 1723-1729 ◽  
Author(s):  
Nicole Gravier-Bonnet
Keyword(s):  
Bilateral Symmetry ◽  
Accurate Description ◽  
General Shape ◽  
Median Part ◽  
First Time ◽  
Species Taxonomy

Study of living colonies of Salacia tetracythara Lamouroux, 1816, led to an accurate description of the hydranths and adjoining tissues. A mantle is reported for the first time for this species, lining stem, hydrocladia and hydrotheca. An adcauline nematocyst clump located in the median part of the column, composed of large microbasic mastigophores, is also reported as a new structure for sertulariids. The hypothetical modified tentacles noted by Billard (1925) are confirmed and re-described. Among the 22–28 tentacles of the hydranth in a circlet, two exhibit nematocyst-bearing organs connected at base. These organs are massive, racket-shaped, refringent, and composed of large microbasic mastigophores. They do not affect the tentacles in respect of their general shape and behaviour. One nematocyst-bearing organ can sometimes be linked to more than one tentacle depending on its size. The abcauline position of the two modified tentacles imparts a strong bilateral symmetry to the hydranth. This location explains why only one modified tentacle was previously described from preserved material, the second being hidden by the first when hydranths are retracted inside the hydrotheca. The modified tentacles of S. tetracythara are compared with the nematodactyls of the genus Nemalecium, with the ligula found in several sertulariid species, and with nematophores described in other thecate families. Beside remarks on species taxonomy and distribution, incitation is given to the study, with emphasis especially on hydranths.

Muscle scars and mode of life of Carinaropsis (Bellerophontoidea, Gastropoda) from the Ordovician of Tennessee

1993 ◽  
Vol 67 (4) ◽  
pp. 528-534 ◽  
Author(s):  
John S. Peel
Keyword(s):  
General Shape ◽  
Mode Of Life ◽  
First Time

Muscle scars are described for the first time in the Ordovician bellerophontoidean gastropod Carinaropsis Hall. Silica replicas from the Cannon Limestone of Tennessee preserve a pair of muscle scars, with a single elongate scar located on each umbilico-lateral angulation of the shell interior more than half a whorl back from the apertural margin. The scars are similar in general shape and position to muscle scars described in Bellerophon de Montfort and the pleurotomarioidean Porcellia woodwardi (Sowerby). In addition to supporting the soft parts within the widely expanded shell, the characteristic internal septum of Carinaropsis probably facilitated clamping of the shell aperture against the substrate.

scholarly journals Description of the larva of Protaetia (Cetonischema) speciosa speciosa (Adams, 1817) (Coleoptera: Scarabaeidae)

2020 ◽  
Vol 420 ◽  
pp. 20-24
Author(s):  
S.A. Shabalin ◽  
◽  
S.V. Tsarkov ◽  
Keyword(s):  
Abdominal Segment ◽  
Median Part ◽  
First Time

The larva of Protaetia (Cetonischema) speciosa speciosa (Adams, 1817) is described and illustrated for the first time. The larvae of the subgenus Cetonischema Reitter, 1899 have a thoracic spiracle same size as a spiracle of abdominal segments VII–VIII, larger than spiracles of abdominal segments I–VI; spiracles of abdominal segments I–VI are the same size; venter of last abdominal segment with short setae and a single of long to short setae on the lateral sides and at the apex, as well as areas without setae and spines in median part. The larva of Protaetia s. speciosa differs from larva of P. speciosissima (Scopoli, 1786) by a number of pali and it chaetotaxy in the row in palidia, and by a chaetotaxy of head capsula.

Triassic roots of the amphiastraeid scleractinian corals

2001 ◽  
Vol 75 (1) ◽  
pp. 34-45 ◽  
Author(s):  
Ewa Roniewicz ◽  
Jarosław Stolarski
Keyword(s):  
Type Species ◽  
Adult Stage ◽  
Bilateral Symmetry ◽  
Radial Symmetry ◽  
Scleractinian Corals ◽  
Upper Triassic ◽  
Phylogenetic Status ◽  
Phylogenetic Hypotheses ◽  
First Time

The Early Carnian (Upper Triassic) phaceloid coral originally described by Volz (1896) asHexastraea fritschi, type species ofQuenstedtiphylliaMelnikova, 1975, reproduced asexually by “Taschenknospung” (pocket-budding), a process documented herein for the first time. This type of budding is recognized only in the Amphiastraeidae, a family thus far recorded only from Jurassic-Cretaceous strata. Similar to amphiastraeids,Quenstedtiphyllia fritschi(Volz, 1896) has separate septal calcification centers and a mid-septal zone built of serially arranged trabeculae. The most important discriminating characters of the new amphiastraeid subfamily Quenstedtiphylliinae are one-zonalendotheca and radial symmetry of the corallite in the adult stage (in contrast to two-zonal and bilateral symmetry in the adult stage in Amphiastraeinae).Quenstedtiphyllia fritschishares several primitive skeletal characters (plesiomorphies) with representatives of Triassic Zardinophyllidae and, possibly, Paleozoic plerophylline rugosans: e.g., thick epithecal wall and strongly bilateral early blastogenetic stages with the earliest corallite having one axial initial septum. To interpret the phylogenetic status of amphiastraeid corals, we performed two analyses using plerophylline rugosans and the solitary scleractinianProtoheterastraea, respectively, as the outgroups. The resulting phylogenetic hypotheses support grouping the Zardinophyllidae with the Amphiastraeidae in the clade Pachythecaliina (synapomorphy: presence of pachytheca). Taschenknospung is considered an autapomorphy for the Amphiastraeidae. This study is the first attempt to analyze the relationships of the Triassic corals cladistically.

MICROMORPHOLOGICAL STRUCTURE OF SEEDS IN SOME SPECIES OF LATHYRUS L. IN SOUTH CAUCASUS (AZERBAIJAN)

2020 ◽  
Vol 6(72) (1) ◽  
pp. 14-25
Author(s):  
G. F. Allahverdiyeva ◽  
A. M. Asgarov
Keyword(s):  
Side Surface ◽  
Morphological Characters ◽  
Morphological Properties ◽  
South Caucasus ◽  
General Shape ◽  
Taxonomic Importance ◽  
The Status ◽  
Different Populations ◽  
First Time ◽  
Electronic Microscope

For the first time, micromorphology structure of seeds in 10 species (L. annuus, L. cicera, L. hirsutus, L. tuberosus, L. miniatus, L. pratensis, L. laxiflorus, L. aphaca, L. nissolia, L. sphaericus) belonging to sections (Lathyrus, Pratensis, Aphaca, Nissolia, Linearicarpus) of Lathyrus L. collected from various regions of Azerbaijan were analysed. Seed samples of 10 species were taken for analysis from different biotopes and different populations located away from one-another. Collected seed materials were gathered in special sterile paper bags and their moisture was dried with silicagel substance in laboratory conditions. During the research, morphological characters, as well as general shape, size and colour of seed, length and width of hilum were identified under Leica EZ4D stereomicroscope. The largest seeds have been measured in Lathyrus (L. cicera 4,4–5,0 mm) section and the smallest seeds in Nissolia (L. nissolia 1,8–2,3 mm) section. The longest hilum belongs to L. miniatus 1,8–2,8 mm and the smallest in L. Nissolia 0,4–0,7 mm. The width hilum was measured in L. annuus (0,7–1,0 mm) and the narrow hilum L. nissolia (0,1–0,3 mm). Mature seed (2–3) samples were selected from each type under the SEM, the seeds were placed on stools with double-sided adhesive tapes and covered with gold powder through the JEOL JFC1600 ion-spray device for 1 to 2 minutes. Seed samples were researched on the side surface. The photos of the surface of seeds were taken in a 3000× size in JEOL JSM6610 lv electronic microscope, and structural analysis of the different places of their surfaces was conducted. The results showed that the microscopic research of the surface of seed is of taxonomic importance and is used in specification of the status of sections. The morphological properties such as surface structure, hilum length and width, papillae features can be used to differentiate some sections and species, but seed size, general shape seed and hilum, seed colour are not characteristics can be used to differentiate some sections.

Some poorly known Asterocheres species (Siphonostomatoida: Asterocheridae) deposited in the Natural History Museum of London

2008 ◽  
Vol 89 (3) ◽  
pp. 521-533 ◽  
Author(s):  
Eugenia Bandera ◽  
Conradi Mercedes
Keyword(s):  
Natural History ◽  
The Body ◽  
Natural History Museum ◽  
General Shape ◽  
History Museum ◽  
The Family ◽  
Mandibular Palp ◽  
First Time

A total of seven poorly known species of the genus Asterocheres, the largest genus of the family Asterocheridae, are redescribed based on material deposited in the Natural History Museum of London. Among the material available, there were specimens of both sexes of A. bulbosus, A. ellisi and A. rotundus; the dissected holotypes for A. hongkongensis, A. indicus and A. ovalis which have no other specimens; and only cotype of A. micheli, turned out to be lost. Some taxonomically important appendages of these species are described and illustrated for the first time. Furthermore, discrepancies have been observed in: (1) the general shape of the body; (2) the antennule segmentation; (3) the omission of some elements in various oral appendages; and (4) the segmentation of the mandibular palp. These redescribed species were then compared with their closest congeners.

New species, taxonomy, phylogeny, and distribution of the tropical tribe Bothriomirini (Insecta: Heteroptera: Miridae: Cylapinae)

2018 ◽  
Vol 50 (1) ◽  
pp. 83-146 ◽  
Author(s):  
Anna A. Namyatova ◽  
Peter Contos ◽  
Gerasimos Cassis
Keyword(s):  
Systematic Review ◽  
Phylogenetic Analysis ◽  
New Species ◽  
Female Genitalia ◽  
Morphological Data ◽  
Climatic Zones ◽  
First Time ◽  
Species Taxonomy

Bothriomirini is a small tropical mirid tribe that has not been comprehensively revised nor has monophyly of the tribe and included genera been tested. This paper presents a systematic review of Bothrioimrini. Bothriomirella ater gen. nov. sp. nov., Bothriomiris lorenzatoae sp. nov., Dashymenia javanensis sp. nov. , Dashymenia jaydeni sp. nov. are described as new to science. A phylogenetic analysis of Bothriomirini based on morphological data is performed. The diagnoses of the tribe and most of its genera are discussed. Bakeriola crassicornis Poppius, Bothriomiris lugubris Poppius, Bothriomiris ornatus Bergroth, Dashymeniella tibialis Poppius and Leprocapsus scutellaris Poppius are redescribed. Female genitalia of Bothrimirini are discussed for the first time. This study supports the monophyly of the tribe and most genera and documents remarkable heterogeneity of the female genitalia. New locality data and a discussion of the distribution of Bothriomirini in relation to major biomes and climatic zones are provided.

scholarly journals Revision of the Quedius fauna of Middle Asia (Coleoptera, Staphylinidae, Staphylininae)

2018 ◽  
Vol 65 (2) ◽  
pp. 117-159 ◽  
Author(s):  
Maria Salnitska ◽  
Alexey Solodovnikov
Keyword(s):  
New Species ◽  
Identification Key ◽  
Widespread Species ◽  
Middle Asia ◽  
First Time ◽  
Species Taxonomy

Twenty eight species of the genusQuediusfrom Middle Asia comprising Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan and Uzbekistan, are revised.QuediusaltaicusKorge, 1962,Q.capitalisEppelsheim, 1892,Q.fusicornisLuze, 1904,Q.solskyiLuze, 1904 andQ.cohaesusEppelsheim, 1888 are redescribed. The following new synonymies are established:Q.solskyiLuze, 1904 =Q.asiaticusBernhauer, 1918,syn. n.;Q.cohaesusEppelsheim, 1888 =Q.turkmenicusCoiffait, 1969,syn. n., =Q.afghanicusCoiffait, 1977,syn. n.;Q.hauseriBernhauer, 1918 =Q.peneckeiBernhauer, 1918,syn. n., =Q.ouzbekiscusCoiffait, 1969,syn. n.;Q.imitatorLuze, 1904 =Q.tschinganensisCoiffait, 1969,syn. n.;Q.novusEppelsheim, 1892 =Q.dzambulensisCoiffait, 1967,syn. n.,Q.pseudonigricepsReitter, 1909 =Q.kirklarensisKorge, 1971,syn. n.Lectotypes are designated forQ.asiaticusBernhauer, 1918,Q.fusicornisLuze, 1904,Q.hauseriBernhauer, 1918,Q.imitatorLuze, 1904,Q.novusEppelsheim, 1892 andQ.solskyiLuze, 1904. For all revised species, taxonomy, distribution and bionomics are summarized.Quediusfuliginosus(Gravenhorst, 1802),Q.sundukoviSmetana, 2003 andQ.pseudonigricepsReitter, 1909 are recorded for Middle Asia for the first time. One species from theQ.coloratus-group, found to be new to science is not described due to shortage of material. Another possibly new species is tentatively identified asQ.fulvicollisStephens, 1833 until the taxonomy of that widespread species is revised. An identification key to all species is provided.

scholarly journals Asymptomatic Unilateral Ovarian Leiomyoma in a German Shepherd Bitch

2017 ◽  
Vol 40 (1) ◽  
pp. 97-101 ◽  
Author(s):  
Alessandro Pecile ◽  
Debora Groppetti ◽  
Valeria Grieco ◽  
Gabriele Barella ◽  
Melania Moioli ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Potential Risk ◽  
Spindle Cell ◽  
Diagnostic Procedures ◽  
Mammary Tumors ◽  
Accurate Description ◽  
German Shepherd ◽  
Clinical Imaging ◽  
Spindle Cell Tumors ◽  
First Time

Abstract This report shows for the first time clinical imaging (ultrasound and computed tomography), histological and immunohistochemical findings of an ovarian leiomyoma, coincidentally diagnosed in an asymptomatic unmated nulliparous ten year-old German shepherd bitch concurrently suffering from multiple mammary tumors. A thorough examination allowed the differentiation of ovarian leiomyoma from other spindle cell tumors. An accurate description of the diagnostic procedures useful in the managing of ovarian leiomyoma could provide valuable information to veterinary practitioners. Indeed, despite its rarity and nonspecific symptoms, ovarian leiomyoma may also affect the dog with an unknown potential risk.

The Human Larynx at the End of the Embryonic Period Proper

1985 ◽  
Vol 94 (6) ◽  
pp. 607-617 ◽  
Author(s):  
Fabiola Müller ◽  
Ronan O'Rahilly ◽  
John A. Tucker
Keyword(s):  
Nerve Fibers ◽  
Laryngeal Nerve ◽  
Sensory Innervation ◽  
Active Process ◽  
Transitional Area ◽  
Pharyngeal Cavity ◽  
Median Part ◽  
Human Larynx ◽  
Sagittal Cleft ◽  
First Time

The laryngeal cavity was studied in eight serially sectioned embryos of stage 23 and in three early fetuses, and graphic reconstructions were prepared. After the isolation of the tracheal from the pharyngeal cavity during stages 16 through 22, a communication (not necessarily the pharyngotracheal duct) appears again during stage 23. At this time (8 postovulatory weeks) the laryngeal cavity comprises 1) the coronal and parts of the sagittal clefts of the vestibule (uniting later at the laryngeal inlet); 2) the ventricles, which are not yet completely formed; and 3) the subglottic cavity, which appeared already in earlier stages. The characteristic events of stage 23 are the dissolution of the epithelial lamina and the development of the ventricles. The disruption of the epithelial lamina is an active process that comprises rearrangement and growth, but not loss of cells. The ventricles, which begin as solid outgrowths in stage 20, do not represent fifth pharyngeal pouches. They now point toward the middle of the still paired thyroid laminae and are not at the level of the future glottis, which lies more caudally. In the absence of the median part of the soft palate, the nasopharynx communicates widely with the oral cavity. The epithelium of the respiratory tube, including the larynx, resembles that of the pharynx and esophagus in being pseudostratified columnar and showing a clear basement membrane. It is ciliated over that part of the epiglottis that surmounts the arytenoid swellings, and also over the tip and back of the latter. The transitional area between the laryngopharynx and the esophagus is already innervated by the recurrent laryngeal nerve. Nerve fibers have not yet reached the epithelium of the coronal cleft and the ventricles, but fibers are present near the sagittal cleft of the vestibule. The sensory innervation of the pharynx and larynx has been followed and plotted for the first time in an embryo, and previously unrecorded silver-impregnated receptors have been observed.

scholarly journals Notes on the Foraminiferal Genera <i>Laterostomella</i> De Klasz and Rérat and <i>Streptochilus</i> Brönnimann and Resig

1989 ◽  
Vol 8 (2) ◽  
pp. 215-225 ◽  
Author(s):  
Ivan De Klasz ◽  
Dick Kroon ◽  
Jan E. Van Hinte
Keyword(s):  
North Atlantic ◽  
Morphological Variability ◽  
Isotopic Data ◽  
General Shape ◽  
The North ◽  
The Pacific ◽  
Upper Cenozoic ◽  
The Indian Ocean ◽  
The North Atlantic ◽  
First Time

Abstract. the biserial foraminiferal genera Laterostomella de Klasz &amp; Rérat (1962) and Streptochilus Brönnimann &amp; Resig (1971) have been described from the Miocene of Gabon and from Miocene to Recent levels of the Pacific and Indian Oceans, respectively. Both genera have since been found in the Upper Cenozoic of other regions: Laterostomella at Rockall Bank in the North Atlantic and in Papua-New-Guinea, and modern Streptochilus specimens were collected with plankton nets in the northern part of the Indian Ocean. The apertural characteristics of Laterostomella and Streptochilus show marked similarities as does the general shape of Laterostomella guembeliniformis with some Streptochilus species. However, other Laterostomella species have a very different form and isotopic data indicate that Laterostomella has a benthic and Streptochilus a planktic life habitat. We conclude that both genera are valid. For the first time SEM pictures of Laterostomella species are presented to show morphological variability, surface texture and aperture types.

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