Figure 5

Details of tagma III. A-D. Erugosquilla massavensis (Kossmann, 1880); macro-fluorescence settings. A, B. Maxilliped 1. A. Posterior view. B. Anterior view. C-E. Dorsal and dorso-lateral view on tagma III; shield removed; not to scale. C. Dorsal view of trunk segments 1-5. Tergite of segment five of tagma III well developed. Lower arrow marks the distinct midline of this tergite. Tergite of trunk segment four narrow and intermittent (upper arrow). Narrow sclerites are present in the valley folds between the tergites. Dorsal area corresponding to trunk segments two and three extremely narrow and without a tergite. Dorsal area corresponding to (maxillipedal) trunk segment one extremely narrow. D. Dorso-lateral view of the same area as in C to ease segment correspondence. Dorsal area of first trunk segment connected to its appendage. This view allows a clear identification of the sclerites as being positioned in the valley folds. E. Comparable view as in D on a late larval specimen of Pseudosquillopsis cerisii (Roux, 1828); micro-fluorescence image. The dorsal area of trunk segment one is significantly broader than in the adult of E. massavensis (which are comparable in this aspect to adults of P. cerisii). Close connection of trunk segments two and three also well apparent. Tergite of trunk segment four still relatively broad. Tergite of trunk segment five medially intermittent comparable to tergite of trunk segment four (arrows). Abbreviations other than before: da1 = dorsal area of trunk segment 1; da2 + 3 = dorsal area of trunk segments 2 and 3; psb = posterior shield border; sc = sclerite; t = tergite.