A morphological, anatomical and palynological study of Aethionema lepidioides (Brassicaceae) - an endangered species endemic to Turkey

Aethionema lepidioides Hub.-Mor. is an endangered endemic species in Turkey with a very narrow natural distribution area. The present study aims to reveal the structural features of this species. For this purpose, its unknown morphological features – such as leaf, petal, sepal dimensions and shapes, filament and anther lengths, as well as seed dimensions, shape, colour and micromorphology – have been studied for the first time. To reveal the pollen characteristics of Ae. lepidioides, light microscope and SEM studies were conducted. Additionally, in the present study the anatomical features of Ae. lepidioides were also studied for the first time. The Ae. lepidioides leaves were found to be linear-oblanceolate, with an entire margin and a subacute to obtuse apex. The seeds were found to be dark brown and oval-shaped, with reticulated surface ornamentation. Anatomical studies found roots in the secondary growth stage, with xylem-filled pith. The stem was in the primary growth stage, featuring a multi-layer cortex under its outermost single-layered epidermis, a pronounced endodermis and a central cylinder beneath. The leaves were thick, amphistomatic and covered with a prominent wax layer. Their mesophyll was equifacial, and their stoma type was anisocytic. A stomatal index of 26 was found for the upper epidermis, while a corresponding index of 28.4 was found for the lower epidermis. The pollens were monad, radially symmetrical and isopolar. The pollen type was colpate, and the pollen shape was found to be prolate-spheroidal with a P/E ratio of 1.08.

Formation and degeneration of scaled capillary notochaetae in Owenia fusiformis Delle Chiaje, 1844 (Oweniidae, Annelida)

Phylotranscriptomic studies of the past decade have repeatedly placed Oweniidae together with Magelonidae, as the sister group to remaining annelids. This newly established placement clearly makes them a key-lineage for understanding annelid evolution and morphology. One of the most prominent morphological features of all annelids are their chaetae. The arrangement and formation process (chaetogenesis) of these chitinous bristles have been studied extensively in hooked chaetae that are arranged in rows. However, the information on other types of chaetae is still scarce. In this study, we investigated the scaled capillary notochaetae of Owenia fusiformis, looking both into the formation process that causes the scaly surface ornamentation and into their arrangement within tight bundles. Our results demonstrate the incredible plasticity of chaetogenesis that allows forming a vast array of three-dimensional structures. The capillary chaetae of Owenia fusiformis are unique in lacking an enamel coating and the scales covering the apical surface of each chaeta are formed by a single microvillus of the chaetoblast. Furthermore, the bundle of chaetae has a peripherally located formative site and a central degenerative site and it appears to result from a secondary curling of the chaetal sac.

Planktonic foraminifera in the seafloor of Wulan Estuary of Demak, Central of Java, Indonesia

Planktonic foraminifera are marine heterotrophic protists that surround their unicellular body with elaborate calcite shells. They exhibit a range of trophic behaviors from indiscriminate omnivory to selective carnivory. The species inhabit the photic zone with various density. The present work was aimed to identify and determine the density of planktonic foraminifera in the seafloor of Wulan Estuary of Demak regency, Central of Java, Indonesia. The sediment in the seafloor was taken using van veen grab sampler from 5 stations based on their position in the estuary. Upon arriving in the laboratory, the samples was washed and sun-dried. The dry sediment samples then were ground and sieved with following mesh sizes, i.e. 0.063, 0.125, and 0.250 mm and put in the plastics sample. The samples of foraminiferan then were hand picking in the picking tray. Classification of planktonic foraminifera is based entirely on the properties of their shells, i.e. wall composition and structure, chamber shape and arrangement, the shape and position of any apertures, surface ornamentation, and other morphologic features of the shell. The present work found 7 genera of planktonic foraminifera from the seafloor of Wulan estuary, i.e. Candeina, Globigerina, Globigerinoides, Globorotalia. Neogloboquadrina, Orbulina, and Pulleniatina. The lowest density was found in the Station 1 (7429 indv.m−2) which was the furthest station from estuary, and the highest density was 7886 indv.m−2 present in Station 3 which was the closest to estuary. Since all seafloor were consisted of silt sediment, these density differences were more influenced by salinity of the water.

Morphology and Distribution of Cutaneous Sensory Organs on the Digits of Anolis carolinensis and A. sagrei (Squamata: Dactyloidae) in Relation to the Adhesive Toepads and Their Deployment

Cutaneous sensory organs are characteristic of many squamate lineages. Such organs may occur on the surface of scales as button-like, circular protuberances set off from their surroundings by a noticeable boundary, often taking the form of a moat or furrow. They may be relatively unadorned, clad with the surface micro-ornamentation of the scales on which they are carried, or they may carry one or more bristles of varying length and surface ornamentation. Such bristles may extend away from the body of the organ to interface with the surrounding environment or to contact adjacent scales. Cutaneous sensory organs have been physiologically demonstrated to have a mechanoreceptive function but have also been posited to potentially be involved with additional sensory modalities. Their distribution and structure across the body surface has been shown to be unequal, with some regions being much more extensively endowed than others, indicative of regional differential sensitivity. The digits of Anolis (Iguania: Dactyloidae) carry adhesive toepads that are convergent with those of geckos (Gekkota). Geckos exhibit a high density of cutaneous sensory organs on their toepads and their form and distribution has been associated with the operation and control of the toepads during locomotion. Investigation of the form and topographical distribution of cutaneous sensory organs on the toepads of Anolis shows them to be convergent in these attributes with those of geckos and quite distinct from those of the ancestrally padless Iguana (Iguania: Iguanidae). Their location at scale margins and the direction of their bristles towards adjacent scales indicates that the cutaneous sensory organs play an important role in proprioception during toepad deployment in Anolis.

Sturgeons (Acipenseridae) from the Late Miocene of Ukraine, with a discussion of materials associated with Widhalm’s (1886) nomen nudum, †Acipenser euhuso

The fossil record of the family Acipenseridae (sturgeons) extends to the Late Cretaceous (c. 85 MY), with a ghost lineage extending to approximately 120 MY when the first members of the family Polyodontidae are known. Much of the fossil record of Acipenseridae is formed by isolated and fragmentary dermal bones, which bear characteristic surface ornamentation. In this paper, we report on a collection of fossil sturgeons from the Upper Miocene deposits of southern Ukraine. These specimens include those used by Widhalm to establish †Acipenser euhuso, which is a nomen nudum. While we do not establish a new taxon for these specimens, the morphological variation of those elements that are preserved does suggest the presence of several species represented in this fauna.

Seed micromorphology and anatomy of 36 Muscari (Asparagaceae) taxa from Turkey with notes on their systematic importance

This study presents the first in-depth evaluation of the morphological and anatomical characters, as well as their taxonomic importance, of the seeds of 36 taxa in subgenera Muscari, Leopoldia, Pseudomuscari and Botryanthus of the genus Muscari in Turkey, where 24 of the taxa are endemic. The results indicate that the taxa generally differ from each other in terms of seed shape and dimension. Seed dimensions vary between 1.66 mm and 3.21 mm in length, and between 1.12 mm and 2.63 mm in width. The seed surface ornamentation is grouped into nine forms: ruminate, reticulate, reticulate-areolate, reticulate-foveate, alveolate, scalariform, rugose, verrucate and areolate. The most common type is ruminate, while areolate, reticulate-foveate and scalariform ornamentation forms were found to be taxon-specific. Testa structures of the taxa examined consist in general of two different layers: the epidermis and the subepidermis in scleranchymatous or parenchymatous structures. The subepidermis may be absent in some of taxa. The structure and thickness of the epidermis and the subepidermis are very important characteristics that disclose interspecific relations among the examined taxa. We also provide a key for the identification of the studied taxa based on seed features.

Utu

<p>Contemporary Māori architecture in Aotearoa is rapidly becoming ‘mainstreamed’ within a New Zealand architectural idiom. However, Māori architecture has been narrowed down to surface ornamentation, a handful of motifs and exhausted narratives. This dissonance is owing to the fact that Mātauranga Māori is not at the iho (core) of Māori architecture at a formal and spatial level. Consequently, this thesis aims to expand Māori architectural theory and practice by proposing that elements of tikanga Māori can be understood both formally and spatially in ways that generate new architectural possibilities. The research was conducted as an iterative design process. Three parts of the pōwhiri process are mapped for their underlying spatiality, both in the physical and meta-physical worlds. The ephemera are translated through a design methodology which reveals what these patterns could mean for contemporary Māori architecture. The three rituals: karanga, wero and hongi are explored as a series of design experiments which follow the same workflow. Each design experiment developed a range of different architectural techniques for expressing tikanga Māori. The use of speculative drawing/ mapping techniques is the principal way in which the spatiality of the ephemera is excavated and interrogated. The following research is not tied to an architectural site. The architecture is not based within a specific context, rather it is born of context, conceiving an architecture of the ephemeral and atmospheric qualities of ritual. This research acknowledges the Māori concept of tuakana-teina (elder sibling-younger sibling) knowledge exchange and draws a parallel with architectural design methodology. This thesis suggests a method of speculation for future generations of architectural designers in Aotearoa to build upon with their own whakaaro (thoughts).</p>

Utu

<p>Contemporary Māori architecture in Aotearoa is rapidly becoming ‘mainstreamed’ within a New Zealand architectural idiom. However, Māori architecture has been narrowed down to surface ornamentation, a handful of motifs and exhausted narratives. This dissonance is owing to the fact that Mātauranga Māori is not at the iho (core) of Māori architecture at a formal and spatial level. Consequently, this thesis aims to expand Māori architectural theory and practice by proposing that elements of tikanga Māori can be understood both formally and spatially in ways that generate new architectural possibilities. The research was conducted as an iterative design process. Three parts of the pōwhiri process are mapped for their underlying spatiality, both in the physical and meta-physical worlds. The ephemera are translated through a design methodology which reveals what these patterns could mean for contemporary Māori architecture. The three rituals: karanga, wero and hongi are explored as a series of design experiments which follow the same workflow. Each design experiment developed a range of different architectural techniques for expressing tikanga Māori. The use of speculative drawing/ mapping techniques is the principal way in which the spatiality of the ephemera is excavated and interrogated. The following research is not tied to an architectural site. The architecture is not based within a specific context, rather it is born of context, conceiving an architecture of the ephemeral and atmospheric qualities of ritual. This research acknowledges the Māori concept of tuakana-teina (elder sibling-younger sibling) knowledge exchange and draws a parallel with architectural design methodology. This thesis suggests a method of speculation for future generations of architectural designers in Aotearoa to build upon with their own whakaaro (thoughts).</p>

STUDY OF FRUITS MORPHOLOGICAL FEATURES FOR 33 SPECIES BELONG TO CRUCIFERAE FAMILY IN IRAQ

The research was aimed to identify fruits morphological characteristics of 33 taxa belonging to the Lepidieae tribe from Brassicaceae. The characteristics of the fruit's general shape, apex shape, dimensions, colors, surface ornamentation, and beak were determined, the results indicated the importance of each of those characters in isolated species, In general, all the tribe's fruits were open capsule and short silicula. According to the dimensions of fruit, three species can be distinguished as a group with dimensions greater than 20mm, as in Brossardia, Coluteocarpus, and Didymophysa, and depending on the shape, it was possible to differentiate the species within this group, while the other species were less than 20 mm. in dimensions. They were distinguished by the general shapes, as the fruits of the Aethionema species were distinguished by their winged shaped, whereas the fruits of the genus Biscutella are bi-lobed, and the fruits have an inverted semi-triangular shape in the Capsella and peltate with prominent veins in the genus Horwoodia, or maybe peltate and longitudinally splintered with dark veins in Iberis, while the genus Sameraria fruit is circular to semi-circular characterized by intermediate appendages, while the individuals of the genus Isatis have linear-oblong fruits, and the species of both genus Lipidium and Hymenolobus were distinguished by their small and elliptic fruits and could be differentiated according to other fruits features. So could be conclude the importance of the characteristic of the general shape of the fruit firstly in species isolation then size, ornamentation, and some other traits.

The anatomical, palynological and micromorphological aspects of three endemic Bellevalia species (Asparagaceae) in Turkey and their taxonomic importance

In the present research, anatomical, palynological and micromorphological characteristics of three endemic Bellevalia species (B. gracilis, B. malatyaensis and B. vuralii) for Turkey are carried out. This work reveals the descriptive characteristics of the examined species, and contribute to solving taxonomic problems. Anatomical studies were carried out on cross sections of root, scape and leaf. The metaxylem, the number of root cortex cells, and the number of cortex and sclerenchyma cells in the scape were found to be significant in terms of taxonomy. Pollen grains of all the examined species were monosulcate and heteropolar. In addition, seed and pollen surface ornamentation were photographed under SEM microscopy, which SEM micrographs showed that the exine sculpturing pattern is reticulate-perforate, and pollen muri walls of were different among the examined species. Conversely, seeds showed a general similarity of the surface among the studied species, all showing a reticulate faveolate ornamentation.