Petrarca goanna, GRYGIER, 1991

Kolbasov, Gregory A., Savchenko, Alexandra S., Yu, Meng-Chen, Tsao, Yao-Feng, Ganmanee, Monthon & Chan, Benny K. K., 2023, Integrative taxonomy, larval biology and functional morphology of the little known gall-forming coral endoparasite Petrarca (Thecostraca: Ascothoracida), Zoological Journal of the Linnean Society 198, pp. 767-801 : 771

PETRARCA GOANNA GRYGIER, 1991

( FIGS 1F , 2–7 )

Figures

Figure 1. Species of the genus Petrarca (Thecostraca: Ascothoracida) endoparasitic in Turbinaria corals in Taiwan. A, globular galls (circled) formed by Petrarca on the surface of Turbinaria coral (modified after Kolbasov et al., 2021). B, gall formed by Petrarca on the coral surface. C, underneath the gall chipped off from coral shows two individuals of Petrarca goana (indicated by

Figure 2. Petrarca goanna, general view, light microscopy.A, B, specimen dissected for body parts’ examination on Figures 3, 4, lateral view from right (A) and left (B) sides. C, D, mature specimen, lateral view from right (C) and left (D) sides. E–G, young specimens, lateral view from right (E, G) and left (F) sides. Scale bars in µm.

Figure 3. Petrarca goanna, antennules and mouthparts. A, left antennule, segments numbered. B, C, terminal (fifth) segments of left and right antennules, respectively. D, rudimentary seta on fourth antennular segment. E, labrum, anterior view. F, mandible. G, cutting edge of mandible. H, maxillule. I, cutting edge of maxillule. J, maxillae. Abbreviations: ae, aesthetasc; cl, claw; clg, claw guard; oe, oesophagus. Scale bars in µm.

Figure 4. Petrarca goanna, thoracopods, penis and abdomen. A, rudimentary setiform thoracopod 1. B, right thoracopods 2–6 (numbered) with clusters of seminal receptacles. C, rudimentary abdomen, segments numbered. D, distal part of penis. Scale bars in µm.

Figure 5. Petrarca goanna, general view and mantle (carapace) structures (SEM). A, habitus, lateral view, right side. B, external surface of mantle, central part. C, external surface of mantle with few papillae/teeth, ventral view. D, external papilla of mantle, ventral view. E, tip of papilla with micropores (indicated by arrowhead). F, habitus with right valve removed (first abdominal segment numbered). G, surface of internal cuticle of mantle. H, ctenoid scales on dorsal surface of thorax. Abbreviations: a1, antennule; ad, adductor muscle; oc, oral cone; pe, penis; rab, rudimentary abdomen; thp, thoracopods. Scale bars in µm.

Figure 6. Petrarca goanna, antennules and mouth parts, SEM. A, distal segments of antennule (numbered). B, rudimentary seta on fourth antennular segment. C, wrinkled cuticle with tiny pores on postaxial (ventral) margin of fifth antennular segment (tiny pores enlarged in circle outline). D, distal half of claw guard aesthetasc. E, labrum, lateral view (ctenoid

Figure 7. Petrarca goanna, rudimentary abdomen, penis, armament/sculpture of maxillae and thoracopods, SEM. A, thick and wrinkled cuticle on distal surface of maxilla. B, ctenoid scales on lateral surface of maxilla. C, ctenoid scales on third thoracopod. D, rudimentary abdomen. E, distal part of penis. Scale bars in µm.