Table 2. Differential characteristics of P. obesi sp. nov strain ph1^T, Peptoniphilus grossensis strain ph5 ^T, Peptoniphilus timonensis strain JC401^T and Peptoniphilus gorbachii WAL 10418^T.

Properties	P.obesi	P.grossensis	P.timonensis	P. gorbachii
Cell diameter (µm)	0.87	1.2	0.91	≥0.7
Oxygen requirement	anaerobic	anaerobic	anaerobic	anaerobic
Gram stain	+	+	+	+
Salt requirement	-	-	-	-
Motility	-	-	-	na
Endospore formation	-	+	+	na
Production of
Phosphatase	-	-	-	-
Catalase	-	-	+	-
Oxidase	-	-	-	-
Nitrate reductase	-	-	-	-
Urease	-	-	-	-
α-galactosidase	-	-	+	-
Indole	-	+	+	var
Arginine arylamidase	+	+	+	+
Glutamyl glutamic acid arylamidase	-	-	-	+
Phenylalanine arylamidase	-	-	-	+/w
Leucine arylamidase	+	+	-	+
Tyrosine arylamidase	-	+	+	+
Alanine arylamidase	-	-	-	-
Glycine arylamidase	-	-	-	+
Histidine arylamidase	-	+	+	-
Serine arylamidase	-	-	+	-
Utilization of
D-mannose	-	+	-	-
Habitat	human gut	human gut	human gut	human

var: variable

w: weak

na: data not available