Category Archives: Invertebrates

Practical Invertebrate Zoology

Format: Rag Book

Language: English

Format: PDF / Kindle / ePub

Size: 11.24 MB

Downloadable formats: PDF

You can skip numbers (in the questions section) 3, 12, 15, 31 You also need to find your own information. The idea finds new interpretation in the unconventional hypothesis that the vertebrate gene Bmp-4 (a ventral determinant gene) may be the counter- part, or homologue of the insect gene dpp (a dorsal de- terminant gene)—Chordin in vertebrates is the dorsal determinant gene, while its apparent counterpart, sog, is a ventral one in insects. The hypophar- ynx probably does not represent true appendages, but is an independent outgrowth of the body wall.

Continue reading Practical Invertebrate Zoology

Molluscs: From Chemo-ecological Study to Biotechnological

Format: Hardcover

Language: English

Format: PDF / Kindle / ePub

Size: 7.23 MB

Downloadable formats: PDF

Further analysis of the honey bee “Dance Language” controversy. In any case, the dorsoventral orientation of the body can be determined internally by the locations of the dorsal ganglion and a thickened ciliated groove, called the en- dostyle, that runs along the ventral side of the pharynx or branchial basket (Figures 23.13 and 23.14; Box 23C). The result is a system wherein the blood is driven from the heart chamber through short vessels and into the hemocoel, where it bathes the internal organs.

Continue reading Molluscs: From Chemo-ecological Study to Biotechnological

Parasitoids: Behavioral and Evolutionary Ecology (Monographs

Format: Hardcover

Language: English

Format: PDF / Kindle / ePub

Size: 6.82 MB

Downloadable formats: PDF

Enzymatic gland cells are abundantly mixed with the ciliated cells of the midgut. An absence of synapomorphies on the anthozoan line suggests that the Anthozoa is a paraphyletic taxon. The water-vascular system in living and fossil echin- oderms. However, the transfer of genetic elements from one species to another is suspected to be by way of 16 CHAPTER ONE UNCORRECTED PAGE PROOFS viruses, bacteria, arthropod parasites, or other vectors. Finally, various transient larval organs are lost, such as most of the larval nervous sys- tem and sense organs.

Continue reading Parasitoids: Behavioral and Evolutionary Ecology (Monographs

Australian Lauxaniid Flies: Revision of the Australian

Format: Hardcover

Language: English

Format: PDF / Kindle / ePub

Size: 6.72 MB

Downloadable formats: PDF

The following lists for the United States and Canada comes from a information originally compiled in 1994. The earliest collected specimens date to the late 1800s, many of which were collected by Dr. The recent genera of the caridean and stenopo- didean shrimps (Crustacea, Decapoda) with an appendix on the order Amphionidacea. Structural conditions of sponges: Trend from one large chamber to numerous small chambers. ... – PowerPoint PPT presentation Considered to be plants until 1765. because there are different cell types.

Continue reading Australian Lauxaniid Flies: Revision of the Australian

Atlas of Invertebrate Reproduction and Development

Format: Paperback

Language: English

Format: PDF / Kindle / ePub

Size: 10.30 MB

Downloadable formats: PDF

Some brittle stars are active predators, capturing ben- thic organisms by curling an arm into a loop around the prey, then pulling it to the mouth. Cleavage is holoblastic and spiral, producing either three (Tubulanus) or, more typi- cally, four quartets of micromeres. The neuroblasts aggregate to form the segmental ganglia. The adaptive significance (for insects) of galls remains unclear, but one popular theory is that their production interferes with the pro- duction of defensive chemicals by the plant, thus ren- 26 CHAPTER SEVENTEEN Figure 17.19 Some insects often viewed as pests. (A) The cat flea (Ctenocehalides felis), adult female. (B) Pediculus humanus, the human head and body louse. (C) Phthirius pubis, the human pubic louse. (D) A kissing bug (Hemiptera, Reduviidae, Triatoma), vector of Trypanosoma cruzi, the causative agent of Chagas’ disease in the New World. (E) Culex (Diptera: Culicidae), a mosqui- to genus that transmits various human pathogens. (F) Mealybugs (Hemiptera: Homoptera: Pseudococcidae), which feed on the juices of house and garden plants. (G) Evidence of the southwestern mesquite girdler, a beetle (Coleoptera: Cerambycidae: Oncideres) that lays its eggs in twigs of mesquite trees, then girdles the branch, prevent- ing the tree from sending its defensive chemical to destroy the eggs; the branch eventually dies and falls off the tree. (B) (C) (A) (D) (G)(E) (F) UNCORRECTED PAGE PROOFS dering gall tissues more palatable.

Continue reading Atlas of Invertebrate Reproduction and Development

C. Elegans Atlas

Format: Spiral-bound

Language: English

Format: PDF / Kindle / ePub

Size: 8.51 MB

Downloadable formats: PDF

Biol. 22: 63–74, 125–136, 189–198, 249–260, 307–313. As in chitons, the mantle encircles the body and foot as a circular fold, forming lateral pallial grooves. For example, blood may transport nutrients and gases, while coelomic fluid may accumulate meta- bolic wastes for removal by nephridia and also serves as a hydrostatic skeleton. Hydroida :representantes con forma pólipo, sesiles y forma medusa errantes (agunas alternan formas pólipo con medusa. e.g.

Continue reading C. Elegans Atlas

Invertebrate Tissue Culture: v. 1

Format: Print Length

Language: English

Format: PDF / Kindle / ePub

Size: 13.90 MB

Downloadable formats: PDF

Among those that have been studied, most are omnivorous, but they frequently show a preference for termites or other arthropods. Ravindranath, “Haemocytes in haemolymph coagulation of arthropods,” Biological Reviews, vol. 55, no. 2, pp. 139–170, 2008. The members of the suborder Oribatida (=Cryptostigmata) are called "beetle" or "moss" mites. The anterior- ly located mouth leads to a short buccal cavity connect- ed to a stomodeal, cuticle-lined esophagus (often called a pharynx).

Continue reading Invertebrate Tissue Culture: v. 1

The Genus Chicoreus and Related Genera (Gastropoda:

Format: Paperback

Language: English

Format: PDF / Kindle / ePub

Size: 9.34 MB

Downloadable formats: PDF

Cambrian derivatives of the early arthropod stem lineage, pentastomids, tardigrades and lobopodi- ans—an “Orsten” perspective. Rates of yolk pro- duction depend on the specific vitellogenic mechanism used. These 2 million species make up about 98% of the total animals identified in the entire animal kingdom, i.e., 98 out of 100 types of animals in the world today are invertebrates. There is also considerable variability in mitosis among protists (Box 5B). Sea lilies are attached to the substratum by stalks, and feather stars crawl using their long, flexible arms.

Continue reading The Genus Chicoreus and Related Genera (Gastropoda:

Habitat Management for Invertebrates: A practical handbook

Format: Paperback

Language: English

Format: PDF / Kindle / ePub

Size: 8.46 MB

Downloadable formats: PDF

PHYLUM MOLLUSCA 11 (H) (I) (J) (G) UNCORRECTED PAGE PROOFS SUBCLASS PULMONATA: Land snails and slugs. The availability of these complete genomic data sets has led to some large-scale attempts to examine animal phylogeny using similar complete nuclear genomic data from Fungi (yeast) and plants (mustard: Arabidopsis) (e.g., Mushegian et al. 1998; Blair et al. 2002). The young eventu- ally emerge from the female’s gonopore and crawl onto her back.

Continue reading Habitat Management for Invertebrates: A practical handbook

Trilobites: Common Trilobites of North America

Format: Print Length

Language: English

Format: PDF / Kindle / ePub

Size: 11.26 MB

Downloadable formats: PDF

Aspects of the behavior of Octopus cyanea Gray. Note the long chaetae. (E) the posterior end of Dero (family Naididae). The firstsuborder con- tains only about 30 species, most of which live in sub- terranean fresh and brackish waters, although a few are marine and interstitial. Wing veins might have evolved from cuticular ridges that served to strengthen these structures, and eventual- ly to circulate blood through them.* Kukalová-Peck’s theory of wing evolution finds sup- port in molecular developmental studies, which have shown that the cells that give rise to the wing primordi- um derive from the same cluster of cells that form the leg primordium, from which they segregate, migrating PHYLUM ARTHROPODA: THE HEXAPODA (INSECTS AND THEIR KIN) 41 Figure 17.37 Fossil insects with paranotal lobes on the prothorax. (A) Stenodictya lobata. (B) Lemmatophora typa. (C) Nymphal stage of Rochdalia parkeri, a Paleozoic terres- trial palaeodictyopteran.

Continue reading Trilobites: Common Trilobites of North America