Table 3. Earthworm species recorded in four sampling sites along an altitudinal gradient in central Veracruz, Mexico.

Species	Family	Origin	Parthenogenetic	Ecological category	Sites and average density (ind./m2)
					LV	LC	NA	AC
Pontoscolex corethrurus	Rhinodrilidae	South America	+	Endogeic	141	330	144	0
Onychochaeta windlei	Rhinodrilidae	South America	+	Endogeic	0	320	0	0
Morph 1	Morphospecies	Mexico	Uncertain	Endogeic	264	0	0	0
Morph 2	Morphospecies	Mexico	Uncertain	Endogeic	155	0	0	0
Morph 3	Morphospecies	Mexico	Uncertain	Endogeic	160	0	0	0
Amynthas gracilis	Megascolecidae	Asia	+	Epi-endogeic	0	240	53	80
Octolasion tyrtaeum	Lumbricidae	Europe	−	Endogeic	0	0	120	67
Aporrectodea trapezoides	Lumbricidae	Europe	+	Endogeic	0	0	0	128
Lumbricus rubellus	Lumbricidae	Europe	−	Epi-endogeic	0	0	0	72
Bimastos parvus	Lumbricidae	North America	+	Epigeic	0	0	0	21

Notes.

LV

Laguna Verde (11–55 masl)

LC

La Concepción (992–1,025 masl)

NA

Naolinco (1,550–1,619 masl)

AC

Acatlán (1,772–1,800 masl)