The Non-Siphonophoran Hydrozoa (Cnidaria) of Salento, Italy with Notes on Their Life-Cycles PDF Download

Author: Cinzia Gravili
Publisher:
ISBN: 9781775576174
Category : Hydrozoa
Languages : en
Pages : 187

View

Book Description

Author: Cinzia Gravili
Publisher:
ISBN: 9781775576181
Category : Hydrozoa
Languages : en
Pages : 187

View

Book Description
The majority of Hydrozoa is represented by not readily noticeable, small species. In recent decades, however, taxonomic knowledge of the group has increased worldwide, with a significant number of investigations focused on the Mediterranean Sea. Over more than two decades, 115 species of hydrozoans were recorded from coastal waters along nearly 300 km of the Salento Peninsula (Apulia, Italy). For each species, records from different collections were merged into single sheets of a general database. For each species, the following information is reported: description, cnidome, biology, occurrence in Salento, worldwide distribution, and bibliography. Descriptions refer to the benthic hydroid stage and, when present, also to the planktonic medusa stage. The 115 species of Hydrozoa, recorded along the Salento coastline, represent 25% of the Mediterranean Hydrozoa fauna (totaling 461 species), and nearly 3% of 3,702 world's known species covered in a recent monograph. Four species are non-indigenous, three of them with invasive behavior (Clytia hummelincki, Clytia linearis, and Eudendrium carneum), and one species now very common (Eudendrium merulum) in Salento. The complete life cycle of Clytia paulensis (Vanhöffen, 1910) is described for the first time.

Author: Willem Vervoort
Publisher:
ISBN: 9789073239432
Category : Biology
Languages : en
Pages : 700

View

Book Description

Author: M. D. Medel
Publisher:
ISBN: 9789073239401
Category : Hydroida
Languages : en
Pages : 706

View

Book Description

Author: Peter Schuchert
Publisher:
ISBN: 9789073239500
Category : Coelenterata
Languages : en
Pages : 162

View

Book Description

Author: Dale R. Calder
Publisher:
ISBN: 9789073239647
Category : Hydrozoa
Languages : en
Pages : 65

View

Book Description

Author: Stephen Cairns
Publisher:
ISBN:
Category : Cnidaria
Languages : en
Pages : 131

View

Book Description

Author: Annette Frese Govindarajan
Publisher:
ISBN:
Category : Hydrozoa
Languages : en
Pages : 180

View

Book Description
The purpose of this thesis is to study campanulariid life cycle evolution and systematics. The Campanulariidae is a hydrozoan family with many life cycle variations, and provide an excellent model system to study life cycle evolution. Additionally, the unique campanulariid Obelia medusae may have been "re-invented" from ancestors without medusae. Chapter 1 reviews campanulariid life cycles and taxonomy. Chapter 2 presents a phylogeny based on 18S rDNA, calmodulin, 16S rDNA and cytochrome c oxidase I (COI). Ancestral life cycles are reconstructed using parsimony. Medusa loss is common, and Obelia may derive from ancestors with typical medusae. Taxonomic results are discussed in Chapter 3. Billardia, a nominal campanulariid, appears phylogenetically distant, while Bonneviella spp. (Bonneviellidae), are nested within the Campanulariidae. Campanulariid genera are not monophyletic. Orthopyxis integra and Clytia gracilis may represent cryptic species, while Obelia longissima may be cosmopolitan. Chapter 4 investigates Obelia geniculata phylogeography. Japanese and North Atlantic 16S rDNA and COI sequences are calibrated against the opening of the Bering Strait. Substitution rates are faster than in anthozoans and comparable to non-cnidarian invertebrates. Comparison of Pacific and Atlantic sequences suggests cryptic species exist. Finally, hydroids in New Brunswick, Canada and Iceland may have survived the last glaciation.

Author: Willem Vervoort
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

View

Book Description

Author: Maria Pia Miglietta
Publisher:
ISBN:
Category : Hydractiniidae
Languages : en
Pages : 334

View

Book Description