| Of those taxa documented, 20 animal phyla,
comprising 1779 species, were listed in the original IRL Species
Inventory.
Phylum Chordata:
Chordate groups (38.7%) consisted of the protochordates and 6 classes
of organisms comprising 689 different species. The
diversity among fishes and birds accounted for a large amount of the total
biodiversity among the chordate group.
| Group |
#
Species |
| Subphylum
Urochordata |
31 |
| Class
Chondrichthyes |
22 |
| Class
Osteichthyes |
376 |
| Class Amphibia |
4 |
| Class Reptilia |
20 |
| Class Aves |
202 |
| Class Mammalia |
34 |
Phylum Mollusca:
Mollusks accounted for 24.1% of the total
animal biodiversity in the IRL. This group consisted of 428 species
in 4 classes:
| Group |
#
Species |
| Class Gastropoda |
265 |
| Class Polyplacophora |
4 |
| Class Bivalvia |
157 |
| Class Cephalopoda |
2 |
Phylum Arthropoda:
Arthropods accounted for 20.2%
of the animal biodiversity in the IRL. This groups consists of 360
species in 7 classes :
| Group |
#
Species |
| Class Meristomata |
1 |
| Class Pycnogonida |
4 |
| Class Maxillopoda |
6 |
| Class Copepoda |
32 |
| Class Ostracoda |
5 |
| Class Insecta |
8 |
| Class Malacostraca |
0 |
|
Order Stomatopoda |
8 |
|
Order Mysidacea |
3 |
|
Order Tanaidacea |
3 |
|
Order Cumacea |
2 |
|
Order Decapoda |
192 |
|
Order Isopoda |
27 |
|
Order Amphipoda |
69 |
Phylum Annelida:
Annelid worms accounted for
8.2% of IRL biodiversity, and consisted of 145 species in 2 classes:
| Group |
#
Species |
| Class Oligochaeta |
2 |
| Class Polychaeta |
143 |
Echinodermata:
Echinoderms
|
Group |
# Species |
| Class Holothuroidea |
10 |
| Class Echinoidea |
5 |
| Class Asteroidea |
5 |
| Class Ophiuroidea |
11 |
Sipuncula:
Sipunculans accounted for 1.0% of IRL biodiversity, with 2 classes of
organisms and 18 species:
| Group |
# Species |
| Class Sipunculidea |
10 |
| Class Phascolosomatidea |
8 |
Other Phyla:
The remaining 6% of total biodiversity in the
IRL consisted of phyla having at
least 1 representative species:
| Group |
# Species |
| Phylum Porifera |
14 |
| Phylum Cnidaria |
31 |
| Phylum Ctenophora |
2 |
| Phylum Platyhelmithes |
5 |
| Phylum Nemertea |
1 |
| Phylum Kinorhyncha |
3 |
| Phylum Entoprocta |
1 |
| Phylum Tardigrada |
2 |
| Phylum Chaetognatha |
6 |
| Phylum Ectoprocta |
36 |
| Phylum Phoronida |
4 |
| Phylum Brachiopoda |
1 |
| Phylum Echiura |
1 |
| Phylum Hemichordata |
1 |
|
