Cryptic Marine Diversity in the Northern Arabian Gulf: An Integrative Approach Uncovers a New Species of Oyster (Bivalvia: Ostreidae), Ostrea oleomargarita

Table 3

Matrix of shell characters of the Kuwait oyster and the main groups of the Ostreoidea.

Taxon		1	2	3	4	5	6	7	8
Fam. Gryphaeidae	Pycnodontinae	1	1	1	1	1	0	1	0
Fam. Ostreidae	Saccostreinae	1	1	2	2	0	1	2	1
Fam. Ostreidae	Crassostreinae	1	0	2	2	0	1	0	1
Fam. Ostreidae	Ostreinae	0	0	2	2	0	1	2	0
Fam. Ostreidae	“Lophinae”	1	1	0	0	0	1	3	0
Kuwait oyster		0	0	2	2	0	1	4	0

1: right valve not plicate (0); plicate (1): 2: hyote spines absent (0); present (1): 3: lamellae of right valve absent (0); erect (1); appressed (2): 4: chalk deposits absent (0); vesicular (1); nonvesicular (2): 5: commisural shelf absent (0); present (1): 6: muscle scar circular (0); reniform (1): 7: chomata absent (0); vermicular (1); ostreine (2); pustular (3); both ostreine and pustular (4): 8: muscle scar not distinctly coloured (0); distinctive (1).