Mature eosinophils: General morphology

2022 ◽  
pp. 7-60
Author(s):  
Rossana C.N. Melo ◽  
Ann M. Dvorak ◽  
Peter F. Weller
Keyword(s):  
General Morphology

Phoronida

2017 ◽  
Author(s):  
Judith Fuchs
Keyword(s):  
Life Cycle ◽  
Small Group ◽  
Larval Stage ◽  
Intertidal Zone ◽  
Marine Invertebrates ◽  
Tree Of Life ◽  
General Morphology ◽  
Family Level ◽  
Planktonic Larval Stage

This chapter describes the taxonomy of Phoronida, a small group of exclusively marine invertebrates found in most of the world's oceans from the intertidal zone to about 400 metres depth. Phoronids are meroplanktonic with a planktonic larval stage usually less than 2 mm in length and a benthic adult whose length ranges from a few cm up to 50 cm. The chapter covers their life cycle, ecology, and general morphology. It includes a section that indicates the systematic placement of the taxon described within the tree of life, and lists the key marine representative illustrated in the chapter (usually to genus or family level). This section also provides information on the taxonomic authorities responsible for the classification adopted, recent changes which might have occurred, and lists relevant taxonomic sources.

Anellida: Holoplanktonic Polychaeta

2017 ◽  
Author(s):  
Claudia Castellani ◽  
Robert Camp
Keyword(s):  
Life Cycle ◽  
Marine Environment ◽  
Tree Of Life ◽  
General Morphology ◽  
Family Level

This chapter describes the taxonomy of Polychaeta, an almost exclusively marine group of organisms belonging to the phylum Annelida. With over 10,000 species described worldwide, they represent one of the most abundant animal taxa in the marine environment. The chapter covers their life cycle, ecology, and general morphology. It includes a section that indicates the systematic placement of the taxon described within the tree of life, and lists the key marine representative illustrated in the chapter (usually to genus or family level). This section also provides information on the taxonomic authorities responsible for the classification adopted, recent changes which might have occurred, and lists relevant taxonomic sources.

Crustacea: Euphausiacea

2017 ◽  
Author(s):  
Alistair J. Lindley
Keyword(s):  
Life Cycle ◽  
Tree Of Life ◽  
General Morphology ◽  
Family Level

This chapter describes the taxonomy of Euphausiacea, exclusively marine holoplanktonic crustaceans commonly known as krill. Although not highly diverse, with only two families and ~ 86 species worldwide, they are often a major component of the biomass of the plankton and micronekton of the world's oceans. This chapter covers their life cycle, ecology, and general morphology. It includes a section that indicates the systematic placement of the taxon described within the tree of life, and lists the key marine representative illustrated in the chapter (usually to genus or family level). This section also provides information on the taxonomic authorities responsible for the classification adopted, recent changes which might have occurred, and lists relevant taxonomic sources.

Crustacea: Lophogastrida and Mysida

2017 ◽  
Author(s):  
Claudia Castellani ◽  
Maiju Lehtiniemi ◽  
Kenneth Meland
Keyword(s):  
Life Cycle ◽  
Ballast Water ◽  
Water Systems ◽  
Tree Of Life ◽  
Brood Pouch ◽  
General Morphology ◽  
Family Level ◽  
Adaptive Nature

This chapter describes the taxonomy of Lophogastrida and Mysida, small shrimp-like crustaceans commonly known as ‘opossum shrimps’ because of the ventral brood pouch in the female. Because of their highly adaptive nature, they have progressively invaded new areas via new connections of water systems and through ballast water. The chapter covers their life cycle, ecology, and general morphology. It includes a section that indicates the systematic placement of the taxon described within the tree of life, and lists the key marine representative illustrated in the chapter (usually to genus or family level). This section also provides information on the taxonomic authorities responsible for the classification adopted, recent changes which might have occurred, and lists relevant taxonomic sources.

Crustacea: Ostracoda

2017 ◽  
Author(s):  
Martin V. Angel ◽  
Anthony W.G. John
Keyword(s):  
Life Cycle ◽  
Tree Of Life ◽  
General Morphology ◽  
Family Level ◽  
Oceanic Species

This chapter describes the taxonomy of Ostracoda, small bivalved crustaceans ranging in size from 0.2 to > 30 mm. The majority are benthic and belong to the subclass Podocopa. The chapter focuses on the holoplanktonic oceanic species. It covers their life cycle, ecology, and general morphology. It includes a section that indicates the systematic placement of the taxon described within the tree of life, and lists the key marine representative illustrated in the chapter (usually to genus or family level). This section also provides information on the taxonomic authorities responsible for the classification adopted, recent changes which might have occurred, and lists relevant taxonomic sources.

Chordata: Fish eggs and larvae

2017 ◽  
Author(s):  
Peter Munk ◽  
Jørgen G. Nielsen
Keyword(s):  
Life Cycle ◽  
Tree Of Life ◽  
Fish Eggs ◽  
General Morphology ◽  
Family Level ◽  
Eggs And Larvae ◽  
Fish Eggs And Larvae

This chapter describes the taxonomy of fish eggs and larvae. Most fish eggs and larvae are planktonic, and are commonly found in plankton net tows. Collectively these fish stages are referred to as ichthyoplankton. The chapter covers their life cycle, ecology, and general morphology. It includes a section that indicates the systematic placement of the taxon described within the tree of life, and lists the key marine representative illustrated in the chapter (usually to genus or family level). This section also provides information on the taxonomic authorities responsible for the classification adopted, recent changes which might have occurred, and lists relevant taxonomic sources.

The development and zoospore ultrastructure of a polycentric chytridiomycete gut fungus, Orpinomyces joyonii comb.nov.

1991 ◽  
Vol 69 (3) ◽  
pp. 580-589 ◽  
Author(s):  
Jinliang Li ◽  
I. Brent Heath ◽  
K.-J. Cheng
Keyword(s):  
Electron Microscopy ◽  
Distribution Pattern ◽  
Key Words ◽  
Light And Electron Microscopy ◽  
General Morphology ◽  
Organelle Distribution ◽  
Central Nuclei

Orpinomyces bovis, a polycentric gut fungus isolated from a steer, was examined with both light and electron microscopy and renamed Orpinomyces joyonii comb.nov. on the basis of its general morphology and zoospore ultrastructure. The multinucleate rhizomycelium is extensively branched, and sporangia form exogenously on branched or unbranched sporangiophores. The organelles in the zoospores have a distribution pattern typical of other gut fungi, i.e., anterior ribosomal aggregates, central nuclei, and posterior presumptive hydrogenosomes. The perikinetosomal apparatus in O. joyonii is comparable to that in monocentric gut fungi but with minor variations. New details of the posterior dome are described. It contains highly ordered specialized lamellae, peripheral granules, and megatubules. Microtubules intersect the dome predominantly at approximately right angles to its surface; this differs from monocentric gut fungi, in which microtubules form a posterior fan running parallel to the dome. We suggest that both monocentric and polycentric gut fungi are monophyletic, since both have a similar, distinctive perikinetosomal apparatus, posterior dome, and organelle distribution pattern. Key words: Orpinomyces joyonii, gut fungi, ultrastructure, posterior dome, perikinetosomal apparatus.

A new species of Hippopotamidae (Mammalia, Artiodactyla) from the Sagantole Formation, Middle Awash, Ethiopia

2004 ◽  
Vol 175 (5) ◽  
pp. 525-533 ◽  
Author(s):  
Jean-Renaud Boisserie
Keyword(s):  
New Species ◽  
East Africa ◽  
Fossil Record ◽  
General Morphology ◽  
Middle Awash ◽  
A New Species

Abstract A new species of Hippopotamidae, Hexaprotodon dulu nov. sp., was discovered in the Middle Awash valley, Afar, Ethiopia. It was found in the Sagantole Formation, within volcaniclastic beds aged between 5.2 Ma and 4.9 Ma (40Ar/39Ar). It is therefore the oldest hippo species described as yet from Ethiopia. This hexaprotodont hippo exhibits a general morphology that is primitive, close in that respect to other Mio-Pliocene forms. However, its cranium and dentition display a distinctive association of measurements and features. This new species increases the hippo fossil record in East Africa. It also reinforces the hypothesis of hippo endemism in each African basin as early as the basal Pliocene.

Biological, ecological, morphological and cytogenetic analyses, with taxonomic notes of Zelurus ochripennis (Stål, 1854) (Hemiptera: Heteroptera: Reduviidae: Reduviinae)

Zootaxa ◽  
2021 ◽  
Vol 4958 (1) ◽  
pp. 345-358
Author(s):  
JADER OLIVEIRA ◽  
KAIO CESAR CHABOLI ALEVI ◽  
HÉLCIO R. GIL-SANTANA ◽  
CLEBER GALVÃO
Keyword(s):  
General Morphology ◽  
Cytogenetic Data ◽  
Cytogenetic Analyses ◽  
First Time ◽  
Taxonomic Summary

Based on specimens of Zelurus ochripennis (Stål, 1854) collected in the entrance zone of a small terrestrial cave, some biological, ecological, morphological and cytogenetic data, as well, as the general morphology of their nymphs are presented for the first time. A short taxonomic summary of the species is also provided. 

Sign in / Sign up

Export Citation Format

Share Document