List of Entomological Publications (Autobibliographie)
Ulrich PAUKSTADT & Laela Hayati PAUKSTADT
Paukstadt, L. H. & Paukstadt, U. (1999): Die Beschreibung der Präimaginalstadien von Antheraea (Antheraea) platessa W. Rothschild, 1903 von Nord-Borneo, sowie Angaben zur Biologie und Ökologie (Lepidoptera: Saturniidae). - Galathea – Berichte des Kreises Nürnberger Entomologen eV (Nürnberg), Suppl. 6: pp. 13-22; col.-pl. with 11 figs.
Summary: The description of the preimaginal instars of Antheraea (Antheraea) platessa W. Rothschild, 1903 from North Borneo with reports on its biology and ecology (Lepidoptera: Saturniidae). - For the first time the preimaginal instars of Antheraea (Antheraea) platessa W. Rothschild, 1903 (Lepidoptera: Saturniidae) from Trusmadi, approximately 1350 m above sea level, North Borneo, are described and figured, and some notes on the biology and ecology of this taxon are presented. The description is fully based on rearing observations. A. platessa was successfully reared in Germany under laboratory conditions by the senior author using willow (Salix caprea Linnaeus, 1753, Salicaceae) as foodplant. Although many of the traditional foodplants, which are known for the larvae of the oak silkmoths were offered, willow was much surprisingly the only footplant, which was accepted by the larvae.
Description of the early stages:
Ovum length ca. 2.6 mm, width 2.3 mm, height 1.85 mm, chorion 0.03 mm thick. Outside coloration ochre, inside whitish; chorionic sculpturing conspicuous, mostly honeycomb-shaped. Ovum partially covered with brownish or dark reddish brown secretion for affixing egg to substrate.
1st instar larva about 6-7 mm long after hatching from egg, main coloration yellowish; each abdominal segment with two transverse stripes just before and behind the transverse rows of scoli, stripes are dorsally pale brownish and laterally black colored. Subspiracular scoli of the 1st till 8th abdominal segments are black. Latter abdominal segments show additionally each one short transverse white and black stripe between subdorsal and subspiracular scoli. White band present between prothoracic shield and head. Head, prothoracic shield, dorsal prothoracic scoli, legs, anal plate, anal prolegs, and spiracles black. Prolegs with a black transverse ring. Scoli not prominent, subspiracular scoli generally shorter than other. Scoli mostly in 6 longitudinal rows, except for prothorax with 8, 9th abdominal segment with 4, and 10th abdominal segment (anal plate) at posterior end with 2 scoli. Bases of dorsal scoli fused on 8th abdominal segment. Dorsal and subdorsal scoli of prothorax fused but tips still separated. Scoli bearing mostly 5-6 translucent whitish or brownish bristles at apex, the prominent scoli of the thoracic and the 9th abdominal segments bearing ca. 10-15 bristles. Bristles of subspiracular, prothoracic and anal scoli longer and those of dorsal scoli more strong.
2nd instar larva ground coloration yellowish green without any conspicuous pattern. A pale yellowish lateral line connecting subdorsal scoli of abdominal segments and continued on the anal prolegs. Prolegs with a black transverse stripe, head, legs, anal prolegs, border of the anal plate, prothoracic shield and its scoli black; apex of dorsal scoli of the 1st to 8th abdominal segments and subspiracular scoli black with an orange base. Other scoli apex orange, dorsal scoli of meso- and metathorax yellowish with orange ring at the base of the black apex. Apex of dorsal scoli of the 1st to 8th abdominal scoli mostly black. Dorsal scoli of 8th abdominal segment fused at their bases, tips always well separated with two rings of bristles in this and all following instars. Spiracles pale orange. Scoli of the abdominal segments dorsally with each 5 strong bristles and a long black hair, subdorsal scoli reduced with 2-3 strong bristles and a long black hair, subspiracular scoli with each 3 strong bristles and approximately 3 long black hairs. Thoracic scoli with stronger bristles and lateral scoli with longer hairs than other.
3rd instar larva ground coloration yellowish green, a lateral beige line connecting subdorsal scoli and the anal prolegs. Bases of most of the scoli, 9th and 10th abdominal segment and prothorax yellowish, spiracles dark brown. Head, legs and anal prolegs black. Prothoracic shield small black, its scoli much reduced. Prolegs with black ring above reddish legs, black bristles on bases of prolegs with conspicuous black hair bases. Dorsal scoli of meso- and metathorax reddish with black apex. Scoli of anal plate light brown. Dorsal thoracic scoli and subdorsal prothoracic scoli on enlarged cuticle. Other Scoli mostly much reduced, turquoise. Bristles mostly reduced in length, single black hairs longer. The cuticle is covered with plenty of small beige club-shaped hairs.
4th larval instar ground coloration pale green, prolegs, thoracic segments, 9th and 10th abdominal segments yellowish, lateral longitudinal stripe beige. Head, prothoracic shield and border of anal plate black. Anal prolegs laterally with a triangular black patch, whitish bordered. Prolegs with a small black ring above reddish legs, bases of long black hairs with conspicuous black hair bases. Bases of dorsal scoli of the meso- and metathorax elongated. Apex of these scoli white with a small black ring at base. All scoli reduced, subspiracular scoli turquoise with each one or two long bristles. Dorsal scoli with short bristles and occasionally with a slender black hair. Scoli of prothorax almost reduced, but bristles still present. Spiracles dark brown, beige centered. Short club-shaped (knobbed) hairs on cuticle as in previous instar, black slender hairs longer, apex mostly knobbed. Slender short white hairs dorsally present, directing cephally.
5th larval instar generally not much different from previous instar. Ground coloration pale green. Yellowish coloration reduced on anal segments, dorsal short scoli of meso- and metathorax yellowish orange colored. Abdominal prolegs not reddish colored as in previous instar, but pale ochre. Mature larva under rearing conditions only 8 cm long.
Cocoon ovoid in shape, grayish beige colored. Mostly similar as in the frithi-subgroup (sensu Nässig 1991). Cocoon covered with a leaf and fixed to the substrate (leaf and twig) by silk; cocoon not extraordinary hard and without strong peduncle as in the Indian A. mylitta (Drury, 1773).
Pupa in the female length 32 mm and largest breadth 15 mm, dark reddish brown colored. Spines at abdominal segments mostly dorsally, laterally reduced. Length of doral spines 0.5 mm and of subspiracular spines 0.2 mm. Strong spines at apex of cremaster present facing dorsally. Antennal cover lenght 10.5 mm and largest breadth 4.2 mm. Covers of hind legs longer than antennal covers. Head with transparent light-detecting 'window' between eye covers.
Remarks: We have to point out that collective-group names used in this contribution were established tentative for certain assemblages of taxonomic convenience, they do not comply with the requirements for a valid description according to the provisions of the ICZN (1985). In the application of group names we mostly follow Nässig (1991), with small modifications by us.