How many eggs do sea spiders lay?
Females usually lay from 200 to 300 not fertilised eggs. Finally, males cover the eggs with sperm (external fertilization).
Do sea spiders make webs?
Besides living underwater, sea spiders differ from their land cousins in other ways– they don’t spin webs, and may have from four to six pairs of long segmented legs, versus four pair for land spiders. Of the 600 or more species of sea spider most are very small, ranging from 1/100 inch to about 20 inches across.
How many legs do Pycnogonida have?
In total, pycnogonids have four to six pairs of legs for walking as well as other appendages which often resemble legs.
How do you know if spider is pregnant?
Female Jumping spiders can produce between 2 and 36 eggs in one egg sac and you can find out if the Jumping spider in question is pregnant by checking if there is an egg sac close by the spider or that she might be pregnant if she has an enlarged abdomen.
What is unique about the ovigerous legs in Pycnogonida?
Unique to the Pycnogonida are the ovigerous legs. These are found, in those species that have them, below the palpa, and a little way back between them and the first walking legs. In many species, they are only present on the males, but in some genera such as Pycnogonum the females carry them also.
What are pycnogonids?
Pycnogonids are odd looking creatures which live in the seas and oceans of the world and normally have 4 pairs of walking legs, but they may have 5 or even 6 pairs in some cases. They have practically no body and a proboscis. They have been relatively little studies and there is a great deal we still do not know about them.
Are Pycnogonida gonochoristic or hermaphrodites?
Pycnogonida are gonochoristic, meaning they have two distinct and separate sexes. However as Nature loves to have exceptions there is one species Aschorhynchus corderoi which is a hermaphrodite, meaning each individual is both male and female.
Do all Pycnogonida have a proboscis?
The proboscis is unique among the Chelicerates, and though all Pycnogonida have a proboscis, its shape and size is variable between species. The degree to which the proboscis can be moved is also variable, but generally it has a very restricted range of dorso-ventral (up and down) movement – and even less lateral (sideways) movement.