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Animal Biodiversity in the Indian River Lagoon

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

56

Class Chondrichthyes

36

Class Osteichthyes

0

Class Amphibia

17

Class Reptilia

80

Class Aves

253

Class Mammalia

77

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

443

Class Polyplacophora

7

Class Bivalvia

255

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 Xiphosura

1

Class Pycnogonida

5

Class Maxillopoda

41

Class Copepoda

28

Class Ostracoda

5

Class Insecta

20

Class Malacostraca

364

Order Stomatopoda

12

Order Peracarida

100

Order Tanaidacea

3

Order Cumacea

1

Order Decapoda

252

Order Isopoda

27

Order Amphipoda

67

Phylum Annelida:

Annelid worms accounted for 8.2% of IRL biodiversity, and consisted of 145 species in 2 classes:

Group

# Species

Class Clitellata

3

Class Polychaeta

209

Echinodermata:

Echinoderms

Group

# Species

Class Holothuroidea

27

Class Echinoidea

12

Class Asteroidea

7

Class Ophiuroidea

20

Sipuncula:

Sipunculans accounted for 1.0% of IRL biodiversity, with 2 classes of organisms and 18 species:

Group

# Species

Class Sipunculidea

8

Class Phascolosomatidea

5

Other Phyla:

The remaining 6% of total biodiversity in the IRL consisted of phyla having at least 1 representative species:

Group

# Species

Phylum Porifera

40

Phylum Cnidaria

73

Phylum Ctenophora

2

Phylum Platyhelmithes

0

Phylum Nemertea

9

Phylum Kinorhyncha

1

Phylum Entoprocta

0

Phylum Tardigrada

1

Phylum Chaetognatha

5

Phylum Bryozoa

59

Phylum Phoronida

2

Phylum Brachiopoda

2

Phylum Echiura

1

Phylum Hemichordata

3