Hamadryas julitta (Fruhstorfer, 1914)

Nieves-Uribe, Sandra, Flores-Gallardo, Adrián, Llorente-Bousquets, Jorge, Luis-Martínez, Armando & Pozo, Carmen, 2019, Use of exochorion characters for the systematics of Hamadryas Hübner and Ectima Doubleday (Nymphalidae: Biblidinae: Ageroniini), Zootaxa 4619 (1), pp. 77-108 : 85

Hamadryas julitta

( Fig. 6 A, B ). Eggs average 1035±26 μm long and 999±10.2 μm wide (n = 5), 1.04 times longer than maximum diameter, and width/length ratio is 0.96. Egg is globose foam, quasi-spheroidal, a bit sinuous or curved due to the knolls; convex base is 1.4 times wider than flat apex. Its base shows roughness, and there are no complete polygons in this region, but some vertices make up a thinner and smaller grid than in the rest of chorion. Base is equivalent to almost 1/6 of the length of the egg. The chorion has seven knolls from the perimicropylar zone and one more from the apical region ( Fig. 6 A , B-i); all show semi-jagged, inconspicuous and broken edges compared to the chorionc surface of H. g. glauconome ( Fig. 6 A-ii). Most of them are bifurcated ( Fig. 6 A-iii, B-iii); those that are continuous have a single slump on the first eighth apical ( Fig. 6 A-iv). The knolls reach the prebasal zone and have slumps between the fourth and apical third, although there are bifurcations shortly before the equator. Background grid shows pentagonal, hexagonal, and irregular polygons, and its margins are rounded; its size is reduced, and its edges are thinner in the prebasal undefined area, which marks the division between chorionic surface and the base. Size of the grid remains constant in valleys; largest polygons are on the summits of knolls ( Fig. 6 A-v) and are two to four times larger than others. Cells in the knolls are organized in a single column so they appear thin ( Fig. 6 B-vi). Macro-cells are at the summit of some knolls surrounded by polygons of similar size, which is why they are inconspicuous ( Fig. 6 A-vii); they are four or five times larger than the polygons of the slopes of the knolls. They are visible from the apical area to shortly after the equatorial region. Between the knolls, polygons form a pattern of 16 to 18 ‘ribs’ that extend from the apex to the base, and these are the most conspicuous among Hamadryas species that possess this character. ( Fig. 6 A-viii, B-viii). Micropylar zone is at the same height as the flat apex ( Fig. 6 B-ix), only summits of the knolls protrude. Color A 10 M 00 N 00.

Material examined: Quintana Roo: Jardín Botánico ECOSUR (20° 50’15” N, 86°53’00” W), 10 msnm, 11-IX- 2017, C. Pozo (ABD-2017, ABD-2021) .

Figures

FIGURE 6. Structure and details of the chorion of Hamadryas julitta. A. Egg in side view; B. Apical view: i. Knoll with beginning in the apical region; ii. Semi-jagged knolls; iii. Bifurcated knolls; iv. Slumps in continuous knolls; v. Grid on the summits of the knolls; vi. ‘Fine’ appearance of the knolls; vii. Macro-cell; viii. ‘Ribs’ between the knolls; ix. Micropylar area with micropyle in the center.