Perilampus crassus Yoo & Darling 2024, sp. nov.
Creators: name: Yoo, Jeong Jae
name: Darling, D. Christopher
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Perilampidae
Perilampus
Perilampus crassus

description: Perilampus crassus Yoo & Darling sp. nov.
Figs 12, 13
Type locality.
USA, Florida, Gainesville.
Type material.
Holotype. “ USA: FL: Alachua Co.: nr. Gainesville airport, 45 m 29°42'0"N, 82°15'40"W 2. Oct. 2016 A. Baker, A. Knyshov, J. Zhang swp AB 16.028 ". The holotype is point-mounted (Female ROME 182771, UCRC). BOLD: AEE 9250 / ITS 2. ROM Online Collection.
Paratypes. USA: 1 female, 2 males. Florida: 1 female, 2 males. Putnam Co., Ordway-Swisher Biol. Station, Rd. C 6: (1 female: ROME 189115 - MCZC; BOLD: AEE 9250; ITS 2. 2 males: ROME 189062 - MCZC; ITS 2; ROME 189063 - MCZC; BOLD: AEE 9250; ITS 2).
Material examined.
USA: 9 females, 4 males. (Suppl. materials).
Additional material examined.
Cuba: 1 female. (1 female: ROME 189093 – USNM).
Etymology.
The specific epithet is the Latin adjective crassus (coarse), in reference to the punctate sculpture on the lateral lobes of the mesoscutum along notaulus.
Description.
Female (Fig. 12). Length: 3.0– 4.8 mm. Color: head iridescent greenish blue or violet; mesosoma and metasoma iridescent greenish blue or violet; clypeus ventral margin entirely iridescent (Fig. 12 I); antenna with scape and pedicel weakly iridescent greenish blue or violet, flagellum brown or black, lighter ventrad and distad.
Head (Fig. 12 G – J): in dorsal view transverse, width slightly greater than twice length, HW / HL 2.1–2.2. Frontal carina: in anterior view straight to weakly sinuate below midlevel of eye; in dorsal view gradually narrowed V shape around median ocellus, FC / MOD 1.5–1.7; distance from lateral ocellus short, FCLO / LOD 0.6–0.7. Scrobal cavity: in anterior view wide, SW / HW about 0.5. Ocelli (Fig. 12 G): a line between anterior margin of lateral ocelli reaching anterior margin of median ocellus or nearly bisecting median ocellus. POL / OOL 1.7–2.1. Ocellar ratios LOD: POL: OOL: LOL 1, 3.1–3.4, 1.5–1.9, 1.1–1.3. Vertex: with strong to weak transverse striations, without large piliferous punctures. Parascrobal area: in lateral view gradually narrowed towards lower eye margin; width narrow, PSW / EL about 0.3; sculpture strongly to weakly striate, without large piliferous punctures. Gena (Fig. 12 J): entirely striate along outer eye margin, striate posterad. Malar space: MSL / EH 0.2–0.3. Lower face (Fig. 12 H, I): with setae sparse laterad torulus, and usually sparse below. Clypeus: CW / CH about 1.4; ventral margin nearly straight; setae evenly distributed, or with small bare area without setae medially.
Mesosoma (Fig. 12 B – F, K, L): Lateral panel of pronotum: about as wide as prepectus, LPP / PPT about 0.9; without flange below level of mesothoracic spiracle in posterior oblique view (Fig. 12 D). Mesofemoral depression: smooth, rugulose, weakly imbricate, or imbricate-alveolate (Fig. 12 L). Mesoscutum: punctures angulate, with narrow or slightly wide and weakly coriarious interspaces (Fig. 12 B); lateral lobe strongly punctate with coriarious or smooth interspaces along notaulus (Fig. 12 C); parascutal carina broadly curved, acuminate (Fig. 12 E). Mesoscutellum: apex with inner margins gradually or abruptly diverging (Fig. 12 K); punctures angulate, with narrow or slightly wide and weakly coriarious interspaces. Axilla: in lateral view imbricate dorsad and rugose-areolate (Fig. 12 F) or carinate ventrad. Axillula: smooth dorsad. Fore wing: stigma small, 2.0–2.5 × as wide as postmarginal vein.
Male (Fig, 13). Length: usually smaller, 3.0– 3.8 mm. As in female, except: Frontal carina (Fig. 13 D): distance from lateral ocellus as wide or shorter, FCLO / LOD 0.5–0.6. Scape (Fig. 13 G, H): pits sparse, covering about 0.3 × scape length.
Diagnosis.
Perilampus crassus can be distinguished by a weakly iridescent and nearly straight ventral margin of clypeus (Figs 12 I, 13 E cf. Figs 8 I, 18 I). Also, the lateral lobe of mesoscutum is more strongly punctate along the notaulus than in the other species with punctate sculpture (Figs 12 C, 13 F cf. Figs 4 C, 5 F, 8 C, 9 F).
Distribution
(Fig. 25 A). Central and southern USA: USA (Arkansas, Florida, Kansas, New Mexico, Texas). Possibly Cuba.
Host association.
Hosts unknown.
Remarks.
This species is supported by both genes (Fig. 1, Suppl. material 5), and there are three BINed specimens on BOLD (AEE 9250) from Florida. Only specimens from Florida were successfully sequenced and the degree of intraspecific genetic variability in this species is unclear. A single specimen collected from avocado fruit imported from Cuba (ROME 189093) suggests that the distribution of P. crassus extends to the Greater Antilles.
description: Published as part of Yoo, Jeong Jae & Darling, D. Christopher, 2024, Integrative taxonomic revision of the Nearctic Perilampus hyalinus species complex (Hymenoptera, Chalcidoidea, Perilampidae) resolves 100 years of confusion about the host associations of P. hyalinus Say, pp. 1301-1383 in Journal of Hymenoptera Research 97 on pages 1301-1383, DOI: 10.3897/jhr.97.133255