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

94 (17)

—

—

65 (8)

—

—

—

29 (9)

IRIDINIDAE

39 (5)

—

—

—

39 (5)

—

—

—

MARGARITIFERIDAE

16 (4)

5 (2)

—

—

—

4 (2)

8 (2)

—

MYCETOPODIDAE

55 (12)

—

8 (2)

51 (12)

—

—

—

—

UNIONIDAE

811 (182)

309 (66)

58 (18)

—

41 (10)

43 (8)

370 (94)

2 (1)

IMPARIDENTIA

CARDIIDAE

5 (3)

—

—

—

—

5 (3)

—

—

CORBULIDAE

3 (2)

—

—

1 (1)

—

—

—

2 (1)

CYRENIDAE

92 (3)

2 (1)

—

3 (1)

4 (1)

3 (1)

84 (2)

2 (1)

CYRENOIDIDAE

10 (3)

—

2 (1)

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

277 (8)

41 (6)

34 (4)

52 (6)

39 (5)

82 (5)

67 (6)

27 (4)

TEREDINIDAE

1 (1)

—

—

—

—

—

1 (1)

—

PTERIOMORPHIA

ARCIDAE

5 (1)

—

—

—

—

—

5 (1)

—

MYTILIDAE

9 (3)

—

—

1 (1)

—

—

9 (3)

—

TOTAL

1453 (262)

361 (77)

104 (26)

189 (35)

129 (25)

148 (22)

554 (117)

63 (17)

1° freshwater

1388 (235)

357 (75)

100 (24)

173 (29)

124 (22)

132 (16)

530 (105)

60 (15)

2° freshwater

65 (27)

4 (2)

4 (2)

16 (6)

5 (3)

16 (6)

24 (12)

3 (2)