Updated Table 1: Patterns of global species and genus richness among freshwater bivalves

This page summarizes the current data on the richness of freshwater bivalve families worldwide, as well as in each biogeographical region.

The table below updates Table 1 of Graf (2013).

Families listed in bold are families representing primary radiations into fresh waters.

Numbers in parentheses indicate the richness of genera. Region abbreviations: NA, North America; CA, Central America; SA, South America; AF, Afrotropics; EU, North Eurasia; AS, East Asia; AU, Australasia, including Oceania.

Family

Global

NA

CA

SA

AF

EU

AS

AU

PALAEOHETERODONTA

ETHERIIDAE

4 (4)

—

—

2 (2)

1 (1)

—

1 (1)

—

HYRIIDAE

93 (15)

—

—

64 (6)

—

—

—

29 (9)

IRIDINIDAE

39 (5)

—

—

—

39 (5)

—

—

—

MARGARITIFERIDAE

16 (4)

5 (2)

—

—

—

4 (2)

8 (2)

—

MYCETOPODIDAE

53 (11)

—

8 (2)

49 (11)

—

—

—

—

UNIONIDAE

800 (180)

304 (66)

58 (18)

—

41 (10)

43 (8)

364 (92)

2 (1)

IMPARIDENTIA

CARDIIDAE

5 (3)

—

—

—

—

5 (3)

—

—

CORBULIDAE

3 (2)

—

—

1 (1)

—

—

—

2 (1)

CYRENIDAE

87 (2)

2 (1)

—

3 (1)

4 (1)

3 (1)

79 (1)

2 (1)

CYRENOIDIDAE

8 (3)

—

—

7 (2)

—

—

1 (1)

—

DONACIDAE

5 (3)

—

—

—

5 (3)

—

—

—

DREISSENIDAE

18 (4)

4 (2)

2 (1)

7 (2)

—

11 (3)

—

—

LASAEIDAE

1 (1)

—

—

—

—

—

—

1 (1)

MACTRIDAE

1 (1)

—

—

—

—

—

1 (1)

—

PHARIDAE

6 (4)

—

—

—

—

—

6 (4)

—

PHOLADIDAE

1 (1)

—

—

—

—

—

1 (1)

—

SPHAERIIDAE

278 (8)

42 (6)

33 (4)

51 (6)

39 (5)

82 (5)

68 (6)

27 (4)

TEREDINIDAE

1 (1)

—

—

—

—

—

1 (1)

—

PTERIOMORPHIA

ARCIDAE

5 (1)

—

—

—

—

—

5 (1)

—

MYTILIDAE

9 (3)

—

—

1 (1)

—

—

9 (3)

—

TOTAL

1433 (256)

357 (77)

101 (25)

185 (32)

129 (25)

148 (22)

544 (114)

63 (17)

1° freshwater

1370 (229)

353 (75)

99 (24)

169 (26)

124 (22)

132 (16)

520 (102)

60 (15)

2° freshwater

63 (27)

4 (2)

2 (1)

16 (6)

5 (3)

16 (6)

24 (12)

3 (2)