diff --git a/src/modules/symba_classes.f90 b/src/modules/symba_classes.f90
index aa0a187f8..8bc32ffed 100644
--- a/src/modules/symba_classes.f90
+++ b/src/modules/symba_classes.f90
@@ -22,6 +22,7 @@ module symba_classes
    character(*), parameter :: ORIGIN_VHX_VARNAME  = "origin_vhx"
    character(*), parameter :: ORIGIN_VHY_VARNAME  = "origin_vhy"
    character(*), parameter :: ORIGIN_VHZ_VARNAME  = "origin_vhz"
+   character(*), parameter :: PL_TINY_TYPE_NAME = "Semi-Interacting Massive Body"
 
    type, extends(netcdf_parameters) :: symba_netcdf_parameters
       integer(I4B) :: origin_type_varid  !! NetCDF ID for the origin type
diff --git a/src/symba/symba_collision.f90 b/src/symba/symba_collision.f90
index 4e21b9411..b4505741b 100644
--- a/src/symba/symba_collision.f90
+++ b/src/symba/symba_collision.f90
@@ -833,6 +833,7 @@ subroutine symba_collision_mergeaddsub(system, param, family, id_frag, Ip_frag,
       integer(I4B) :: i, ibiggest, nstart, nend, nfamily, nfrag
       logical, dimension(system%pl%nbody)    :: lmask
       class(symba_pl), allocatable            :: plnew
+      character(*), parameter :: FRAGFMT = '("Fragment",I0.7)'
    
       select type(pl => system%pl)
       class is (symba_pl)
@@ -884,6 +885,7 @@ subroutine symba_collision_mergeaddsub(system, param, family, id_frag, Ip_frag,
                         plnew%status(1:nfrag) = NEW_PARTICLE
                         info(1:nfrag)%origin_time = param%t
                         do i = 1, nfrag
+                           write(info(i)%name, FRAGFMT) id_frag(i)
                            info(i)%origin_xh(:) = plnew%xh(:,i)
                            info(i)%origin_vh(:) = plnew%vh(:,i)
                         end do
@@ -892,6 +894,7 @@ subroutine symba_collision_mergeaddsub(system, param, family, id_frag, Ip_frag,
                         plnew%status(1:nfrag) = NEW_PARTICLE
                         info(1:nfrag)%origin_time = param%t
                         do i = 1, nfrag
+                           write(info(i)%name, FRAGFMT) id_frag(i)
                            info(i)%origin_xh(:) = plnew%xh(:,i)
                            info(i)%origin_vh(:) = plnew%vh(:,i)
                         end do
@@ -907,6 +910,7 @@ subroutine symba_collision_mergeaddsub(system, param, family, id_frag, Ip_frag,
                         info(2:nfrag)%origin_type = "Hit and run fragment"
                         info(2:nfrag)%origin_time = param%t
                         do i = 2, nfrag
+                           write(info(i)%name, FRAGFMT) id_frag(i)
                            info(i)%origin_xh(:) = plnew%xh(:,i)
                            info(i)%origin_vh(:) = plnew%vh(:,i)
                         end do
diff --git a/src/symba/symba_util.f90 b/src/symba/symba_util.f90
index f5201ac6c..93d4155e2 100644
--- a/src/symba/symba_util.f90
+++ b/src/symba/symba_util.f90
@@ -298,6 +298,11 @@ module subroutine symba_util_index_eucl_plpl(self, param)
          select type(param)
          class is (symba_parameters)
             pl%lmtiny(1:npl) = pl%Gmass(1:npl) < param%GMTINY
+            where(pl%lmtiny(1:npl))
+               pl%info(1:npl)%particle_type = PL_TINY_TYPE_NAME 
+            elsewhere
+               pl%info(1:npl)%particle_type = PL_TYPE_NAME 
+            end where
          end select
          nplm = count(.not. pl%lmtiny(1:npl))
          pl%nplm = int(nplm, kind=I4B)