2

Mangrove Horseshoe Crab (Carcinoscorpius rotundicauda)

…is a species of horseshoe crab found throughout Southeast Asia and India and is the only member of the genus Carcinoscorpius. Like other horseshoe crabs the mangrove horseshoe crab is primarily nocturnal and feeds on benthic invertebrates like insect larvae, worms, and crustaceans, it grinds these food items up with its bristly legs and moves them into its chelicerae to be ingested. Like their Atlantic cousins mangrove horseshoe crabs will congregate in the shallows during the spring for mating (although they don’t do it in the same force.)

Phylogeny

Animalia-Arthropoda-Chelicerata-Merostomata-Xiphosura-Limulidae-Carcinoscorpius-rotundicauda

Image Source(s)

Name:  Atlantic horseshoe crab (Limulus polyphemus)

Phylum: Arthropoda

Class: Merostomata

Order: Xiphosura
 
Family: Limulidae
 
Region: Are most commonly found in the Gulf of Mexico and along the northern Atlantic coast of North America

Risk of Extinction: Near Threatened

More Info: It’s a living fossil. The blood of horseshoe crabs contains the copper-containing protein hemocyanin at concentrations of about 50 g per liter. These creatures do not have hemoglobin (iron-containing protein), which is the basis of oxygen transport in vertebrates. The blood of horseshoe crabs contains one type of blood cell, the amebocytes. These play an important role in the defense against pathogens. Amebocytes contain granules with a clotting factor known as coagulogen; this is released outside the cell when bacterial endotoxin is encountered. The resulting coagulation is thought to contain bacterial infections in the animal’s semiclosed circulatory system.

(photo taken from http://palaeos-blog.blogspot.com.es/2012/12/el-mito-del-fosil-viviente-caso-limulus.html)

3

FINALLY finished this up! While in Rhode Island I found a tiny travel-sized horseshoe crab prosoma, probably from a lil crab molting. I didn’t take any ‘before’ pictures, but it was covered in encrusting algae and full of sand. I managed to get it back to California in one piece and let it soak in a bucket of diluted bleach all day. I scrubbed it with some wire brushes to get the last bits of algae off, and sprayed it with lacquer to make it shiny and strong. It’s probably my favorite thing in my dead things collection right now; all the spines are intact, you can see the facets of the compound eyes, as well as the tiny holes where the median eyes were. 

ellieannes said:

OK so I know you haven't written anything about these guys in forever but Basorexia for Dante and HC? sorryIjustlovethemalot

AAAAAAA b a b i e s thank u ellie

-

Nowadays, when Dante sits out the Ondine’s deck, while dawn clings to the world around them for a few precious minutes, there is no joy in his demeanor and no love for the world. Talk among the crew regulates that the seas have broken the boy’s spirit. But the boy, who is no longer a boy now, watches the dim horizon in a way that reminds Horseshoe Crab of soldiers. Of people who have seen things that not even their wildest nightmares could have prepared them for. 

Read More

Expand

A, Anterior view of cross section through cephalothorax showing arrangement of extrinsic muscles of the third leg. B, Dorsal view showing approximate locations of ‘‘muscular somites’’ composing the carapace and tergum.

GROSS MUSCULAR ANATOMY OF LIMULUS POLYPHEMUS (XIPHOSURA, CHELICERATA) AND ITS BEARING ON EVOLUTION IN THE ARACHNIDA by Jeffrey W. Shultz The Journal of Arachnology Volume 29 Number 3

Text
Photo
Quote
Link
Chat
Audio
Video