Insularicoccus, Hodgson & Williams

Chris J. Hodgson & Douglas J. Williams, 2018, Revision of the soft scale genus Paralecanium (Hemiptera: Coccomorpha: Coccidae) with the introduction of three new genera and twenty new species, Zootaxa 4443 (1), pp. 1-162: 11

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INSULARICOCCUS Hodgson & Williams  gen. n.

Type species: Paralecanium carolinensis Beardsley, 1966  , 488.

Generic diagnosis. Adult females showing most character-states typical of Paralecanium  but with following combination of characters. Structure of test unknown. Body generally widest posteriorly narrowing to a more pointed anterior end, and often asymmetrical. Dorsum becoming sclerotised at maturity, with areolations present. Preopercular pores present in groups submedially on abdomen, each group fused into a compound pore. Clear areas present or absent. Dorsal setae setose. With 2 or 3 other pore types, including a small simple pore and a smaller pore, perhaps with a microduct. Anal plates longer than combined width; anogenital fold with 3 pairs of setae on anterior margin, each lateral margin with 1 medially. Marginal ornamentation present as castellations. Marginal setae fan-shaped, broader than long. Marginal radial lines very clear, each quite broad near margin, with 11 around anterior margin of head, each side with 3 between stigmatic clefts and 11 on abdomen. Stigmatic rays absent but with a marginal radial line sometimes extending from each cleft. Stigmatic clefts deep and sclerotised, each with an elongate group of 5+ rather stout stigmatic spines extending radially onto dorsum. Multilocular discpores in transverse bands medially on abdominal segments V, VI and VII. Spiracular disc-pore bands complete. Ventral microducts few. Ventral setae few. Antennae 6 segmented but somewhat reduced, with variable setal arrangements. Spiracles rather small. Legs either well developed or reduced to leg-stumps.

Name derivation. Insularicoccus  is composed of insulari- (from the Latin insularis, masculine, meaning “of an island”), referring to the distribution of the two species presently included in the genus, both from islands in the Pacific Ocean, and coccus  , a word used to describe many scale insects.

Currently, this genus contains two species, the type species from Micronesia and I. syzygium Hodgson  spec. n. from Papua New Guinea. They can be separated using the following key.

1. Legs present and well developed; each stigmatic cleft with 8–20 short clavate stigmatic spines in an elongate triangular group. Marginal radial lines long and pronounced...................................... I. carolinensis (Beardsley)  comb. n.

- Legs represented by minute stubs; each stigmatic cleft with 5 or 6 short, bluntly-pointed stigmatic spines in an elongate triangular group. Marginal radial lines short but distinct.................................... I. syzygium Hodgson  spec. n.