chordate evolution Archives

HERDMANIA SLIDES

Herdmania slides are widely used in zoology laboratories to study the structural organization of Herdmania, a simple urochordate belonging to the subphylum Tunicata. These slides typically include transverse and longitudinal sections showing the tunic, branchial sac, stigmata, gonads, and nerve ganglion. Students observe Herdmania slides to understand its filter-feeding system, retrogressive metamorphosis, and its significance […]

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FISH SLIDES (SCOLIODON)

Fish slides of Scoliodon are widely used in zoology laboratories to study the internal and external anatomy of the spiny dogfish shark. These slides typically display structures such as the gills, fins, vertebrae, muscle blocks, and sensory organs. Students examine Scoliodon slides to understand cartilaginous fish morphology, respiratory adaptations, and evolutionary features that distinguish elasmobranchs