Table 1.

Invertebrates exhibiting induction, specificity, and/or immunological memory in the nonpathogenic context of first and second challenges with transplants (n.a.: not analyzed).

Species	Challenge	Specifity	Memory	References
Porifera
C. diffusa	Tissue (allograft) transplantation	+	+	Smith and Hildemann,1986 [35]
G. cydonium		+	n.a.	Müller et al., 1999 [36]
Cnidaria
E. stricta	Colonial contact/allograft, xenograft	+	n.a.	Theodor, 1970 [37]
M. verrucosa		+	+	Hildemann et al., 1977 [38]
Nemertea
L. ruber	Tissue (allograft, xenograft) transplantation	+	+	Bierne and Langlet, 1974 [39];
L. lacteus				Langlet and Bierne,1975 [40]; 1982 [41]; 1984 [42]
Annelida
Earthworms L. terrestris E. fetida	Tissue (allograft, xenograft) transplantation	+	+	Cooper, 1969 [43]; Cooper and Roch, 1986 [44]
Leeches H. medicinalis G. complanata	Tissue (allograft, xenograft) transplantation	+	+	Tettamanti et al., 2003 [45]
Mollusca
I. fruhstorferi	Tissue (allograft) Transplantation	+	n.a.	Yamaguchi et al., 1999 [46]
Arthropoda
P. americana B. orientalis	Tissue (allograft, xenograft) transplantation	+	+	Hartmann and Karp, 1989 [47]; Karp and Meade, 1993 [48]
Echinodermata
S. purpuratus L. pictus	Tissue (allograft) transplantation	+	−	Coffaro and Hinegardner, 1977 [49]
D. imbricata		+	+	Karp and Hildemann, 1976 [50]
Tunicata
B. schlosseri	Colonial contact/allograft	+	n.a.	Rinkevich et al., 1998 [51]; Scofield et al., 1982 [52];
S. plicata		+	+	Raftos et al., 1987 [53]; 1988 [54]