diff --git a/src/libecoprimer/ecoprimer.h b/src/libecoprimer/ecoprimer.h
index cfbdcc7..31a4ef1 100644
--- a/src/libecoprimer/ecoprimer.h
+++ b/src/libecoprimer/ecoprimer.h
@@ -157,6 +157,8 @@ typedef struct {
 
 	uint32_t   		inexample;         //< example sequence count
 	uint32_t   		outexample;        //< counterexample sequence count
+	uint32_t   		intaxa;            //< example taxa count
+	uint32_t   		outtaxa;            //< counterexample taxa count
 
 
 
@@ -169,10 +171,6 @@ typedef struct {
 	float			quorumin;
 	float           quorumout;
 //
-//	uint32_t		ampsetcount;
-//	uint32_t		ampsetindex;
-//	pampseqset_t	ampset;
-//
 //	uint32_t		taxsetcount;
 //	uint32_t		taxsetindex;
 //	ptaxampset_t	taxset;
@@ -237,9 +235,14 @@ typedef struct {
 	bool_t        no_multi_match;
 	char		  taxonrank[20];  //TR to count ranks against a pair
 	int32_t		  taxonrankidx;   //TR to count ranks against a pair
+
+	// Some statistics useful for options filters
+
 	int32_t       dbsize;
 	int32_t		  insamples;
 	int32_t		  outsamples;
+	int32_t       intaxa;
+	int32_t       outtaxa;
 } options_t, *poptions_t;
 
 typedef ecoseq_t  **pecodnadb_t;
@@ -291,4 +294,12 @@ ppair_t insertpair(pair_t key,ppairtree_t list);
 /*TR: Added*/
 ppairtree_t buildPrimerPairs(pecodnadb_t seqdb,uint32_t seqdbsize,pprimercount_t primers,poptions_t options);
 
+int32_t counttaxon(int32_t taxid);
+int32_t getrankdbstats(pecodnadb_t seqdb,
+					   uint32_t seqdbsize,
+					   ecotaxonomy_t *taxonomy,
+					   poptions_t options);
+float taxonomycoverage(ppair_t pair, poptions_t options);
+
+
 #endif /* EPSORT_H_ */