Definition of Subtrapezoidal. Meaning of Subtrapezoidal. Synonyms of Subtrapezoidal

- than a single evolute coil. Whorl sections are oval, subquadrate, or subtrapezoidal. Sutures bend forward on the outer rim, forming wide shallow ventral...
- delicate lirae, the interstices radiately striate. The aperture is subtrapezoidal and plicate within. The lip is double. The basal margin is denticulate...
- slight uncoiling of the last whorls. Juvenile whorls are depressed subtrapezoidal to subrectangular in section, with slightly convex flanks, arched venter...
- medium-sized s****. Coiling is evolute, while whorl section is depressed, subtrapezoidal with oblique flanks and broad and low venter, maximum width is at shoulder...
- with most of the inner whorls exposed; whorl sections subquadrate to subtrapezoidal, with rounded venter. Ribbing is strong, in some sharp. Primary ribs...
- pairs were long and powerful, without spines. The prosoma (head) was subtrapezoidal, with arcuate compound eyes on parallel axes. The male genital appendages...
- genus have evolute, moderately compressed s****. Whorl section is subtrapezoidal to subrectangular. Ventrum is tricarinate, but furrows are not very...
- the curved distal margin of the chelae (claws). The prosoma (head) is subtrapezoidal (a trapezoid with rounded corners), with compound eyes located near...
- larger molariforms of Megalonyx and Megalocnus. The first molariform is subtrapezoidal in cross-section, while it is subrectangular in Megalonyx and Megalocnus...
- expanding. Whorl section of first two whorls approximately circular, subtrapezoidal in later whorls. Umbilicas perforated, protoconch swollen, not in contact...