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Fig. 1 | Frontiers in Zoology

Fig. 1

From: From egg to “no-body”: an overview and revision of developmental pathways in the ancient arthropod lineage Pycnogonida

Fig. 1

Adult morphology of Pycnogonida and male paternal brood care. a Colossendeis australis, dorsal view. Note small body and prominent proboscis and long walking legs. b Nymphon australe, lateral view of anterior body region of an egg-carrying male, autofluorescence image. For better view of proboscis, cheliphores, palps and ovigers, the walking legs have been removed. c Nymphon molleri, ventral view of live male carrying egg packages (arrowheads) of different matings on each oviger. Note color change of egg packages from proximal (orange) to distal (light yellow) along the oviger, being indicative of different developmental stages of the embryos. d Ascorhynchus ramipes, ventral view of male carrying four egg packages (arrowheads). Note that both ovigers insert into each of the midline-spanning packages. e Nymphon micronesicum, ventral view of male carrying far advanced postlarval instars, autofluorescence image. In some pycnogonid species, the offspring leaves the male’s ovigers only at far advanced developmental stages

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