Structure and systematics of Hanguana, a monocotyledon of uncertain affinity

1999 ◽  
Vol 12 (2) ◽  
pp. 311 ◽  
Author(s):  
Paula J. Rudall ◽  
Dennis W. Stevenson ◽  
H. Peter Linder
Keyword(s):  
Floral Anatomy ◽  
Systematic Position ◽  
Root Anatomy ◽  
Morphological Data ◽  
Cell Divisions ◽  
Plasmodial Tapetum ◽  
Male Flowers ◽  
Inaperturate Pollen ◽  
First Time ◽  
Female Flowers

Floral anatomy and some aspects of leaf and root anatomy of Hanguana are described for the first time and reviewed with respect to its systematic position in monocotyledons. Several characters support its placement in the commelinoid clade, including cell wall ferulates, silica bodies and tetracytic stomata with non-oblique cell divisions. Analysis of morphological data indicates that Hanguana is the sister taxon to Zingiberales. Characters supporting this association include spinulate inaperturate pollen, plasmodial tapetum type, mucilage-secreting intra-ovarian trichomes and modified septal nectaries. Gynoecial nectaries were present in male flowers (probably modified septal nectaries, as in some Zingiberales) and staminodial nectaries in female flowers examined.

scholarly journals First Descriptions of Larva and Pupa of Bagous claudicans Boheman, 1845 (Curculionidae, Bagoinae) and Systematic Position of the Species Based on Molecular and Morphological Data

Insects ◽  
2019 ◽  
Vol 10 (6) ◽  
pp. 166
Author(s):  
Rafał Gosik ◽  
Miłosz A. Mazur ◽  
Natalia Sawka-Gądek
Keyword(s):  
Feeding Habits ◽  
Morphological Characters ◽  
Systematic Position ◽  
Morphological Data ◽  
Larval Morphology ◽  
Mature Larva ◽  
Larval Stages ◽  
First Time ◽  
Specimen Identification ◽  
First Descriptions

In this paper, the mature larva and pupa of Bagous claudicans are described and illustrated for the first time. Measurements of younger larval instars are also given. The biology of the species is discussed in association with larval morphology and feeding habits. Overall larval and pupal morphological characters of the genus Bagous are presented. Confirmation of the larva identification as Bagous claudicans species was conducted by cytochrome oxidase I (COI) sequencing. DNA barcoding was useful for specimen identification of larval stages. The systematic position of the species within the Bagous collignensis-group, based on morphological and molecular results, is also discussed.

scholarly journals Flower structure and development in Vietnamese Sciaphila (Triuridaceae: Pandanales): refined knowledge of the morphological misfit family and implications for taxonomy

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e10205
Author(s):  
Maxim S. Nuraliev ◽  
Margarita V. Remizowa ◽  
Dmitry D. Sokoloff
Keyword(s):  
Reproductive Organs ◽  
Morphological Data ◽  
Sem Images ◽  
Congenital Fusion ◽  
Perianth Tube ◽  
The Common ◽  
Male Flowers ◽  
First Time ◽  
Inside Out ◽  
Comprehensive Study

The monocot family Triuridaceae is a morphological misfit with respect to several traits of floral morphology, including the uniformly apocarpous polymerous gynoecium and the famous inside-out flowers of Lacandonia. Although Triuridaceae are crucially important for understanding the floral evolution of Pandanales and angiosperms in general, significant knowledge gaps exist which hamper adequate morphological analysis of flowers in this family. The scarcity of morphological data is also reflected in numerous taxonomic inconsistencies. Here we provide a comprehensive study of reproductive organs of four species of Sciaphila occurring in Vietnam (S. arfakiana, S. densiflora, S. nana and S. stellata) including the first investigation of early floral development and gynoecium phyllotaxis. Our observations are mainly based on SEM images. We confirm the perianth (studied in male flowers) to be two-whorled and report a rare sequence of initiation of perianth parts: the outer tepals show a late congenital fusion, as their free lobes appear before the common perianth tube, whereas the inner tepals show an early congenital fusion, with their free lobes initiating on the tube rim. We interpret the stamen appendages as basal adaxial outgrowths of the stamen filaments. We discuss the number of thecae and locules in anthers of Sciaphila, and conclude that 3- and 4-, but not 2-locular anthers are characteristic of this genus. We describe the carpels as consisting of both ascidiate and plicate zones, the former being extremely short and completely obscured by anthesis. The single ovule is attached in the cross-zone. The style is non-plicate. We analyze gynoecium phyllotaxis by estimating its contact parastichies, and by investigating the number and arrangement of the outermost carpels. The carpel arrangement in a given gynoecium is a result of the balance between whorled and irregular (but not spiral) phyllotaxis. We recognize the following figures of gynoecium merism: 6, 9, 10, 10.5, 11 and 12, with the prevalence of those divisible by three. We discuss our results in the light of general diversity of floral structure of monocots. Our data allow to clarify several issues in taxonomy of Asian Sciaphila and indicate directions of further studies. We report a significant range extension for S. densiflora, which is newly recorded for the flora of Vietnam. We describe for the first time staminodes in female flowers of this species. We reveal two distinct morphs of S. nana in Vietnam. We highlight the need of a thorough revision of S. secundiflora species complex in order to verify the species boundaries and, in particular, to test the identity of the Vietnamese S. stellata.

The role of progenesis in the diversification of the interstitial annelid lineage Psammodrilidae

2018 ◽  
Vol 32 (4) ◽  
pp. 774 ◽  
Author(s):  
Katrine Worsaae ◽  
Gonzalo Giribet ◽  
Alejandro Martínez
Keyword(s):  
Systematic Position ◽  
Morphological Data ◽  
Character State ◽  
Ancestral Character State ◽  
Ciliary Motion ◽  
Ancestral Character State Reconstruction ◽  
Adaptive Morphology ◽  
First Time ◽  
Hooked Chaetae

Psammodrilidae constitutes a family of understudied, nearly completely ciliated, small-sized annelids, whose systematic position in Annelida remains unsettled and whose internal phylogeny is here investigated for the first time. Psammodrilids possess hooked chaetae typical of macroscopic tube-dwelling semi-sessile annelids, such as Arenicolidae. Yet, several minute members resemble, with their conspicuous gliding by ciliary motion and vagile lifestyle, interstitial fauna, adapted to move between sand grains. Moreover, psammodrilids exhibit a range of unique features, for example, bendable aciculae, a collar region with polygonal unciliated cells, and a muscular pumping pharynx. We here present a combined phylogeny of Psammodrilidae including molecular and morphological data of all eight described species (two described herein as Psammodrilus didomenicoi, sp. nov. and P. norenburgi, sp. nov.) as well as four undescribed species. Ancestral character state reconstruction suggests the ancestor of Psammodrilidae was a semi-sessile larger form. Miniaturisation seems to have occurred multiple times independently within Psammodrilidae, possibly through progenesis, yielding small species with resemblance to a juvenile stage of the larger species. We find several new cryptic species and generally reveal an unexpected diversity and distribution of this small family. This success may be favoured by their adaptive morphology, here indicated to be genetically susceptible to progenesis.

The floral organogenesis of Eurycorymbus cavaleriei (Sapindaceae) and its systematic implications

Phytotaxa ◽  
2017 ◽  
Vol 297 (3) ◽  
pp. 234 ◽  
Author(s):  
LI-MIN CAO ◽  
LOUIS P. RONSE DE CRAENE ◽  
ZHI-XIN WANG ◽  
YUE-HUA WANG
Keyword(s):  
Electron Microscope ◽  
Systematic Position ◽  
Monotypic Genus ◽  
Floral Organogenesis ◽  
Spiral Sequence ◽  
Eurycorymbus Cavaleriei ◽  
Male Flowers ◽  
Floral Characters ◽  
Female Flowers ◽  
Scanning Electron

Eurycorymbus is an unusual monotypic genus of Sapindaceae endemic to China. The floral organogenesis of E. cavaleriei has been investigated with the light and scanning electron microscope to clarify its floral characters and its uncertain systematic position. Eurycorymbus cavaleriei possesses several unique characteristics in Sapindaceae. Flowers are unisexual. Sepals initiate in a spiral sequence, followed by five alternating petals which resemble sepals at maturity. The sequential initiation of eight stamens partly overlaps with that of the petals. Three carpellary lobes are simultaneously demarcated and merge gradually to form a tricarpellate ovary. Mature stamens of male flowers have long and smooth filaments, which are folded in buds. In female flowers only one or two ovules per ovary develop into seeds. The extrastaminal nectary forms doubly scalloped lobes. Symmetry changes from oblique monosymmetry at a mid-developmental stage to polysymmetry at maturity. It is suggested that monosymmetry might precede polysymmetry in the evolution of Sapindaceae.

First Records of Bufo luchunnicus (Yang et Rao, 2008) and Amolops wenshanensis Yuan, Jin, Li, Stuart et Wu, 2018 (Anura: Bufonidae, Ranidae) from Vietnam

2020 ◽  
Vol 27 (2) ◽  
pp. 81-86
Author(s):  
Cuong The Pham ◽  
Minh Duc Le ◽  
Chung Van Hoang ◽  
Anh Van Pham ◽  
Thomas Ziegler ◽  
...  
Keyword(s):  
Natural History ◽  
Genetic Divergence ◽  
Morphological Data ◽  
Type Series ◽  
Lao Cai ◽  
First Time ◽  
Nd2 Gene ◽  
Quang Ninh

We record two species of amphibians for the first time from Vietnam: Bufo luchunnicus from Lao Cai and Son La provinces and Amolops wenshanensis from Quang Ninh Province. Morphologically, the Vietnamese representatives of B. luchunnicus resemble the type series from China. The specimen of A. wenshanensis from Vietnam slightly differs from the type series from China by having a smaller size (SVL 33.2 mm vs. 35.7 – 39.9 mm in males) and the presence of distinct transverse bands on the dorsal surfaces of limbs. Genetic divergence between the sequence of the Vietnamese specimen and those of A. wenshanensis from China available from GenBank is 1.2 – 1.6% (ND2 gene). In addition, morphological data and natural history notes of aforementioned species are provided from Vietnam.

scholarly journals An Overview of the Helminths of Moor Frog Rana arvalis Nilsson, 1842 (Amphibia: Anura) in the Volga Basin

Diversity ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 61
Author(s):  
Igor V. Chikhlyaev ◽  
Alexander B. Ruchin
Keyword(s):  
Systematic Position ◽  
Helminth Fauna ◽  
Helminth Species ◽  
Volga Basin ◽  
Rana Arvalis ◽  
Amphibian Species ◽  
Volga River ◽  
Spirometra Erinacei ◽  
First Time ◽  
Moor Frog

This is the first review of the helminth fauna of the moor frog Rana arvalis Nilsson, 1842 from the Volga river basin (Russia). The article summarizes the authors’ and literature data on the helminthic fauna of this species. The method of complete helminthological dissection was used. Thirthy-eight helminth species were recorded from three classes: Cestoda (1), Trematoda (28), and Chromadorea (9). Nine helminth species are new to the moor frog in Russia: trematodes Gorgodera varsoviensis Sinitzin, 1905, Strigea falconis Szidat, 1928, larvae, Neodiplostomum spathoides Dubois, 1937, larvae, Tylodelphys excavata (Rudolphi, 1803), larvae, Pharyngostomum cordatum (Diesing, 1850), larvae, Astiotrema monticelli Stossich, 1904, larvae and Encyclometra colubrimurorum (Rudolphi, 1819), larvae, nematodes Strongyloides spiralis Grabda-Kazubska, 1978 and Icosiella neglecta (Diesing, 1851). The cestode Spirometra erinacei (Rudolphi, 1918), larvae were observed of this amphibian species in the Volga basin for the first time. The nematodes Rhabdias bufonis, Oswaldocruzia filiformis, Cosmocerca ornata and the trematode Haplometra cylindracea form the core of the helminth fauna of the moor frog. Information on species of helminths includes systematic position, localization, areas of detection, type and scheme of life cycle, geographical distribution, and degree of specificity to host amphibians.

scholarly journals Sharing the Agrarian Knowledge with Archaeology: First Evidence of the Dimorphism of Vitis Pollen from the Middle Bronze Age of N Italy (Terramara Santa Rosa di Poviglio)

2021 ◽  
Vol 13 (4) ◽  
pp. 2287
Author(s):  
Anna Maria Mercuri ◽  
Paola Torri ◽  
Assunta Florenzano ◽  
Eleonora Clò ◽  
Marta Mariotti Lippi ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Bronze Age ◽  
Pollen Morphology ◽  
Pollen Dispersal ◽  
Archaeological Site ◽  
Central Mediterranean ◽  
Pollen Dimorphism ◽  
History Of ◽  
Inaperturate Pollen ◽  
Female Flowers

The recovery of inaperturate pollen from functionally female flowers in archaeological layers opens the question of a possible pollen-based discrimination between wild and domesticated Vitis vinifera in prehistoric times. Pollen analysis applied to archaeology has not routinely considered the existence of pollen dimorphism in Vitis, a well-known trait in the field of agrarian studies. Therefore, the inaperturate shape of grapevine pollen is ignored by studies on the archaeobotanical history of viticulture. In this paper we investigate pollen morphology of the domesticated and wild subspecies of V. vinifera, and report the first evidence of inaperturate Vitis pollen from an archaeological site. We studied exemplar cases of plants with hermaphroditic flowers, belonging to the subspecies vinifera with fully developed male and female organs, cases of dioecious plants with male or female flowers, belonging to the wild subspecies sylvestris and cases of V. vinifera subsp. vinifera with morphologically hermaphroditic but functionally female flowers. The pollen produced by hermaphroditic and male flowers is usually trizonocolporate; the pollen produced by female flowers is inaperturate. This paper reports on the inaperturate pollen of Vitis found in an archeological site of the Po Plain, Northern Italy. The site dated to the Bronze Age, which is known to have been a critical age for the use of this plant with a transition from wild to domesticated Vitis in central Mediterranean. Can the inaperturate Vitis pollen be a marker of wild Vitis vinifera in prehistoric times? Palynology suggests a possible new investigation strategy on the ancient history of the wild and cultivated grapevine. The pollen dimorphism also implies a different production and dispersal of pollen of the wild and the domesticated subspecies. Grapevine plants are palynologically different from the other Mediterranean “cultural trees”. In fact, Olea, Juglans and Castanea, which are included in the OJC index, have the same pollen morphology and the same pollen dispersal, in wild and domesticated plants. In contrast, the signal of Vitis pollen in past records may be different depending on the hermaphroditic or dioecious subspecies.

Three new cribrimorph bryozoans (order Cheilostomatida) from the early Miocene of Argentina, with a discussion on spinocystal shield morphologies

2021 ◽  
pp. 1-15
Author(s):  
Juan López-Gappa ◽  
Leandro M. Pérez ◽  
Ana C.S. Almeida ◽  
Débora Iturra ◽  
Dennis P. Gordon ◽  
...  
Keyword(s):  
Type Species ◽  
Systematic Position ◽  
Early Miocene ◽  
Morphological Data ◽  
Fossil Species ◽  
Extant Species ◽  
The Family ◽  
Subjective Synonym

Abstract Bryozoans with calcified frontal shields formed by the fusion of costae, collectively constituting a spinocyst, are traditionally assigned to the family Cribrilinidae. Today, this family is regarded as nonmonophyletic. In the Argentine Cenozoic, cribrilinids were until recently represented by only two fossil species from the Paleocene of Patagonia. This study describes the first fossil representatives of Jolietina and Parafigularia: J. victoria n. sp. and P. pigafettai n. sp., respectively. A fossil species of Figularia, F. elcanoi n. sp., is also described. The material comes from the early Miocene of the Monte León and Chenque formations (Patagonia, Argentina). For comparison, we also provide redescriptions of the remaining extant species of Jolietina: J. latimarginata (Busk, 1884) and J. pulchra Canu and Bassler, 1928a. The systematic position of some species previously assigned to Figularia is here discussed. Costafigularia n. gen. is erected, with Figularia pulcherrima Tilbrook, Hayward, and Gordon, 2001 as type species. Two species previously assigned to Figularia are here transferred to Costafigularia, resulting in C. jucunda n. comb. and C. tahitiensis n. comb. One species of Figularia is reassigned to Vitrimurella, resulting in V. ampla n. comb. The family Vitrimurellidae is here reassigned to the superfamily Cribrilinoidea. The subgenus Juxtacribrilina is elevated to genus rank. Inferusia is regarded as a subjective synonym of Parafigularia. Parafigularia darwini Moyano, 2011 is synonymized with I. taylori Kuklinski and Barnes, 2009, resulting in Parafigularia taylori n. comb. Morphological data suggest that these genera comprise different lineages, and a discussion on the disparities among cribrilinid (sensu lato) spinocysts is provided. UUID: http://zoobank.org/215957d3-064b-47e2-9090-d0309f6c9cd8

Studies in the Alismataceae. XI. Development of the inflorescence and flowers of Wiesneria triandra (Dalzell) Micheli

2000 ◽  
Vol 77 (11) ◽  
pp. 1569-1579
Author(s):  
W A Charlton
Keyword(s):  
Shoot Development ◽  
Annual Plant ◽  
Foliage Leaf ◽  
The Family ◽  
Unisexual Flowers ◽  
Male Flowers ◽  
Female Flowers

Wiesneria triandra (Dalzell) Micheli is an unusual annual plant of the Alismataceae with spike-like inflorescences bearing unisexual flowers. Shoot development follows the sympodial pattern of other Alismataceae, but the cycle is so condensed that initiation of each foliage leaf is followed by inflorescence formation. The plant develops a tufted habit by the formation of an unusual accesory bud adjacent to each inflorescence. Male flowers have three sepals, three petals, three stamens, and usually three carpellodes; female flowers have a similar perianth, three staminodes, and three or more carpels. Up to the first three carpels, floral parts are arranged in alternating trimerous whorls. Additional carpels may occur above and between those of the first whorl. The androecium is particularly unusual for the Alismataceae since it has conventional alternation of stamens with petals rather than the antipetalous pairs of stamens commonly perceived in the family, but the phylogenetic postion of Wiesneria within the family (as revealed by other studies) indicates that the apparently conventional androecium of Wiesneria represents a derived state rather than a primitive one. The unisexual flowers also represent a derived state.

Pollination ecology of Monstera obliqua (Araceae) in French Guiana

2007 ◽  
Vol 23 (5) ◽  
pp. 607-610 ◽  
Author(s):  
Mathieu Chouteau ◽  
Melanie McClure ◽  
Marc Gibernau
Keyword(s):  
French Guiana ◽  
Pollination Ecology ◽  
Lower Portion ◽  
Floral Rewards ◽  
Pollination Mechanisms ◽  
Unisexual Flowers ◽  
Male Flowers ◽  
Female Flowers

Data on pollination ecology of Araceae are still scarce and most concern species belonging to the subfamily Aroideae (García-Robledo et al. 2004, Gibernau 2003, Ivancic et al. 2004, 2005; Maia & Schlindwein 2006). In this subfamily, inflorescences consist of unisexual flowers: female flowers are located in the lower portion and the male flowers are in the upper portion of the inflorescence (Mayo et al. 1997). In the documented neotropical Aroideae, pollinators are nocturnal beetles and pollination mechanisms take place within a floral chamber during a short flowering cycle (generally 24–48 h) with floral rewards (sterile flowers rich in proteins and/or lipids) for the beetle pollinators, the secretion of resin to secure pollen on the pollinator, and the production of heat and odours (Chouteau et al. 2007, García-Robledo et al. 2004, Gibernau & Barabé 2002, Gibernau et al. 1999, 2000, 2003; Maia & Schlindwein 2006, Young 1986).

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