dactylus


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dactylus

[′dak·tə·ləs]
(invertebrate zoology)
The structure of the tarsus of certain insects which follows the first joint; usually consists of one or more joints.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
a larger cheliped, dorsal view; b same, ventral view; c smaller cheliped, dorsal view; d same, ventral view; e right second pereopod, lateral view; f same, propodus and dactylus, lateral view.
2, I-M) Not chelate; 1st pereiopod of 4 spines in basal endite; 3 strong and two weak spines in dactylus of 1st pereiopod; general shape unchanged from 2nd pereiopod through 5th pereiopod.
Outer maxillipeds placed nearly longitudinally; merus and ischium fused, a demarcation line sometimes visible between them; palpus three segmented, carpus slightly longer than subtrapezoidal propodus, dactylus articulated disto-medially on ventral margin of subtrapezoidal propodus, overreaching it considerably.
The cheliped (and in fact all the legs) comprise seven segments, coxa, basis, ischium, merus, carpus, propodus and dactylus in that order, not four as stated.
2A, C), the similar morphology of pereiopods 3-5 but the distinctly different dactylus of pereiopod 2, the well developed suture on both uropods, and other characters of the genus (see Goy and Provenzano 1979; Alvarez et al.
Our focus is on the mandibular palp, the medial rim of the basis of maxilla 1 and maxilliped 1, the propodus and dactylus of the endopod of maxilliped 2, and the dactylus of the endopod of maxilliped 3.