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. 2017 Dec 2;17:236. doi: 10.1186/s12862-017-1076-y

Fig. 4.

Fig. 4

Details of manual phalanx I-1 of Ostromia crassipes, showing the regular development and non-collapsed margins of the longitudinal groove. a, stereophotograph. b, magnification of the shaft of the phalanx