internal structure of Herdmania

Herdmania- Sea Squirts

Herdmania- Sea Squirts Systematic position of Herdmania Kingdom- Animalia Phylum- Chordata Sub Phylum – Urochordata, Tunicata Class- Acidiacea Order- Pleurogona Suborder- Stolidobranchia Family – Pyuridae Genus- Herdmania Habit and Habitat: Herdmania is a sedentary filter-feeding tunicate found in marine habitats. The animal often occurs in a gregarious form. These are Read more…

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balanogossus

Balanoglossus

Balanoglossus It is a marine water-dwelling acorn worm (Enteropneusta). Blanoglossus cannot survive in freshwater. It belongs to hemichordates. it is an “evolutionary link” between invertebrates and vertebrates. Discovered by J.F. Eschscholtz in 1825 in Mashail Island. He described it as a worm-like holothurian. Kowalewski (1865) discovered the gill – slits Read more…

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herdmania

Subphylum – Urochordata

Subphylum – Urochordata (Tunicates) Subphylum – Urochordata: Position of Urochordates- Lamarck placed Tunicata in between radiate and Vermes in his system of classification. Later they were kept in Mollusca. Kowalevsky kept them in chordates in 1866. The Urochordates are also known as tunicates. These are commonly known as “sea squirts”. Read more…

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Amphioxus (Lancelet)

Amphioxus (Lancelet)

Amphioxus (Lancelet) The Amphioxus also known as lancelet, Consisting of 30 to 35 species of “fish-like” chordates. Branchiostoma is one of the few living genera of lancelets. It is the type genus of the family Branchiostomidae. The lancelets are believed to be related to Pikaia (530-million-year-old) fossils. The first representative Read more…

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Red blood cell compatibility chart

Blood Groups: Types of Blood Grouping

Blood Groups: Types of Blood Grouping The blood is classified on the basis of the presence and absence of antibodies and inherited antigenic substances on the surface of RBCs (red blood cells). The antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system. Blood types are Read more…

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