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- The body of priapulans (PRYE-uh-PUH-luhns) is divided into three parts: introvert (IN-troh-vert), trunk, and tail. The animals use a pair of muscles to pull the introvert completely into the trunk. Spines of various sizes and shapes cover the entire surface of the introvert.Learn more:The body of priapulans (PRYE-uh-PUH-luhns) is divided into three parts: introvert (IN-troh-vert), trunk, and tail. The animals use a pair of muscles to pull the introvert completely into the trunk. Spines of various sizes and shapes cover the entire surface of the introvert.www.encyclopedia.com/science/encyclopedias-alm…Priapulida are up to 15cm long and are found in colder waters at a variety of depths from tidal to abyssal. Their body cavity has a mesodermal lining, so they can be regarded as coelomate; however the lining is unlike that of other coelomates. The cuticular trunk is moulted periodically.www.bumblebee.org/invertebrates/PRIAPULIDA.htm
Caught in the act: priapulid burrowers in early Cambrian substrates
The fossils reveal unusual and exceptionally fine details about the external anatomy of early Cambrian worms. Indeed, because Specimen A ( figure 3 a ) appears to be a cast of the …
key aspects of their functional anatomy, espe-cially those related to feeding (eversible toothed pharynx) and locomotion (eversible and con-tractile proboscis). With its slender shape, Pri …
Priapulida: Nature's Penis Worm | The Taxonomy - Earth Life
The trunk bears 20 to 30 external annuli (rings) but there is no internal segmentation. Basic Biology of the Priapulids. The body has a cuticle that contains chitin, as well as other materials …
(PDF) Symmetry of priapulids (Priapulida) - ResearchGate
Feb 1, 2001 · Priapulids possess a radial symmetry that is remarkably reflected in both external morphology and internal anatomy. It results in the appearance of …
- Estimated Reading Time: 5 mins
Preservation and phylogeny of Cambrian ecdysozoans …
Sep 6, 2016 · As a phylum, Priapulida are characterized by an invaginable proboscis (introvert) bearing multiple longitudinal rows of scalids and …
- Author: Robert S. Sansom
- Publish Year: 2016
Priapulida - an overview | ScienceDirect Topics
The aschelminthan worms and articulates share the presence of external chitinous cuticle which has to be periodically shed off to allow growth of the body volume.
Marine Worms, Sedentary Lifestyle & Annelids - Britannica
There is no circulatory system. The excretory system consists of flame cells (solenocytes) opening by ducts to the exterior. The nervous system is very simple, consisting of a nerve ring …
Priapulida, penis worms - bumblebee
Priapulida are up to 15cm long and are found in colder waters at a variety of depths from tidal to abyssal. Their body cavity has a mesodermal lining, so they can be regarded as coelomate; however the lining is unlike that of other …
Morphology and anatomy of Maccabeus tentaculatus (Priapulida ...
A whole series of morphological peculiarities of the external and internal morphology corresponds to the mode of life and feeding of the animals. All the specimens found are females. The larva …
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