Eois parumsimii Doan, 2024

Doan, Lydia M., Miller, James S., Brown, John W., Forister, Matthew L. & Dyer, Lee A., 2024, Two new species of the hyperdiverse geometrid moth genus Eois (Lepidoptera, Geometridae, Larentiinae) from Ecuador, with descriptions of early stages, ZooKeys 1192, pp. 111-140 : 111

Eois parumsimii Doan sp. nov.

Figs 20-23

Type material.

Holotype ♂, Ecuador, Napo, Yanayacu Biological Station, 2113.9 m, 00°35'48.998"S, 77°53'17.998"W, Nov 2012, r.f. 71361, Earthwatch (UNR). Paratypes (5♂, 2♀). Ecuador: Napo: Yanayacu Biological Station, 2066.8 m, 00°34'0.001"S, 77°52'0.001"W, Feb 2005, r.f. 1673, 1674 (2♂), Sept 2010, r.f. 51792 (1♂), Earthwatch (UNR); 2188.4 m, 00°35'54"S, 77°53'44.34"W, Nov 2005, r.f. 9442 (1♂), Earthwatch (UNR); 1240.7 m, 00°43'38.798"S, 77°46'22"W, Jun 2014, r.f. 84256 (1♀), Earthwatch (UNR); 1871.9 m, 00°31'31.2"S, 77°52'35.399"W, Aug 2014, r.f. 85960, 85963 (1♂, 1♀), Earthwatch (UNR).

Diagnosis.

This species is described from specimens reared from larvae collected at Yanayacu Biological Station in Ecuador. Externally, E. parumsimii is distinct from all of species in the genus, with a much broader, yellow, postmedial line on a pale pinkish gray ground color (Fig. 20 ). The male genitalia of E. parumsimii can be distinguished from those of other members of the complex by the following combination of character states: the ventral margin of the saccus forming a blunt conical pocket (vs a small, transverse-ovoid pocket in most other species); and the membrane surrounding the phallus with a large dorsal field of short spines arranged in a series of longitudinal rows (vs arranged in two longitudinal rows most other in species). The female genitalia of E. parumsimii have short, trapezoidal papillae anales, whereas the papillae anales are slenderer in most other species; and the signum is located laterally on the left side of the corpus bursae, whereas it located ventrally in many other species of the complex.

Description.

Male. Head: Essentially as described for species complex. Thorax: Essentially as described for species complex, except forewing length 8.0-9.0 mm (n = 8); ground color manzanilla olive, anterior portion of antemedial line very faint, posterior portion prominent, pale yellow; postmedial line well defined, wavy, pale yellow; discal spot well defined, red brown; basal 0.66 of costal margin concolorous with ground color, distal portion with clay-brown markings; termen with slender clay-brown line; fringe two-toned, mostly pale yellow, with red-brown incursion between veins M2 and M3. Forewing underside ground color pale yellow, suffused with red-brown, inverse to dorsal pattern; antemedial line absent; postmedial line prominent, width variable, but broader near costa and posterior margin; discal spot round, faint, clay-brown; termen clay brown. Fringe pale yellow. Hindwing upperside ground color clay-brown; antemedial line faint; postmedial line wavy, pale yellow; discal spot round, well defined, orange-brown; termen clay-brown. Fringe pale yellow. Hindwing with pattern similar to forewing, with prominent pale yellow antemedial and postmedial lines and faint discal spot. Abdomen: Genitalia (Fig. 22 ) with tegumen arms forming rounded triangular dorsal arch, curving slightly posterad; ventral margin of saccus forming a blunt conical pocket; transtilla slender, V-shaped; juxta wide basally, abruptly narrowed in distal 0.33 with acute dorsal part; dorsal margin of juxta narrow, truncate, with a small down-curved lip; valva subrectangular, weakly constricted on ventral margin near distal end of sacculus; a brush of bristle-like setae near apex, contrasting with remaining setae; setae at apex of sacculus longer than width of valva; ventral margin of sacculus bowed outward; base of phallus narrow, horn-shaped, membrane surrounding phallus with large dorsal field of short spines arranged in longitudinal rows; phallus ca as long as valva; vesica bifurcated distally with two appendices, one with distal group of spine-like cornuti, the other at base of vesica with a single, large scobinate plate.

Female. Head and Thorax: Essentially as described for male except lacking rami on antenna. Abdomen: Genitalia (Fig. 23 ) with papillae anales short, trapezoidal. Dorsal membrane between Tg8 and papillae anales bearing a large dorsal sac. Ductus bursae wide; ductus seminalis arising from elongate, triangular appendix at base of corpus bursae; Corpus bursae oblong, without mesal constriction, distal appendix absent; signum wing-shaped with serrate lateral margins, located laterally on left side of corpus bursae, internal part horn-like.

Biology and distribution.

This species is known only from Napo Province, Ecuador. Adults were reared from larvae (n = 25) discovered in the field on Piper baezanum , which is a threatened species endemic to Ecuador ( Santiana and Pitman 2004).

The eggs, larvae, and pupae of E. parumsimii have all the same general characteristics described above for Eois with no modifications (Figs 1-4 ) and are difficult to distinguish from those of E. pseudolivacea . All larval instars (until the prepupal stage) are similarly colored, with a translucent beige head capsule, pale green thorax and abdomen, translucent pinacula, and paired subdorsal yellow spots on all segments form T2-A6. Abdominal segments are separated by slight constrictions. The prothoracic legs and abdominal prolegs are tan. The prepupa is translucent.

Etymology.

The species epithet Eois parumsimii is a patronym for Michael Lumibao, who is the partner and long-time supporter of the first author; the name is derived from his Chinese zodiac animal.

Figures

Figures 20 - 23. Eois parumsimii 20 holotype upperside (UNR) 21 holotype underside (UNR) 22 male genitalia, slide 75819 (UNR) 23 female genitalia, slide 75961 (UNR).

Figures 1 - 4. Early stages of Eois pseudolivacea from Ecuador 1 egg 2 second instar larva 3 fifth instar larva 4 pupa.