Pectocera fortunei Candèze, 1873

Kim, Donguk, Hyun, Sangeun & Choi, Kwang Shik, 2025, First report of an intersex individual of the click beetle Pectocera fortunei (Elateridae) and additional cases of gynandromorphism in Coleoptera (Lucanidae, Scarabaeidae), Biodiversity Data Journal 13, pp. e 144929-e 144929 : e144929-

publication ID

https://doi.org/10.3897/BDJ.13.e144929

DOI

https://doi.org/10.5281/zenodo.14899686

persistent identifier

https://treatment.plazi.org/id/BFF4CEDF-2AB8-588E-B428-FA17CDFFF02A

treatment provided by

Biodiversity Data Journal by Pensoft

scientific name

Pectocera fortunei Candèze, 1873
status

 

Pectocera fortunei Candèze, 1873

Materials

Type status: Other material. Occurrence: sex: 1 intersex; occurrenceID: 52C9BE44-7BEA-5418-BC0A-7598D646DA89; Taxon: genus: Pectocera ; specificEpithet: fortunei ; scientificNameAuthorship: Candèze, 1873; Location: country: South Korea; locality: CNU, Gung-dong, Yuseong-gu, Daejeon, Sang Eun Hyun leg. ; Event: eventDate: 25.V.2023; Record Level: basisOfRecord: Preserved Specimen

Type status: Other material. Occurrence: sex: 5 females; occurrenceID: DCF7A291-7B77-54A4-A0F3-BF14635E96E8; Taxon: genus: Pectocera ; specificEpithet: fortunei ; scientificNameAuthorship: Candèze, 1873; Location: country: South Korea; locality: CNU, Gung-dong, Yuseong-gu, Daejeon, Sang Eun Hyun leg. ; Record Level: basisOfRecord: Preserved Specimen

Type status: Other material. Occurrence: sex: 1 male, 1 female; occurrenceID: EE66458A-FC82-55DB-AAB4-CB64DBE9B5E7; Taxon: genus: Pectocera ; specificEpithet: fortunei ; scientificNameAuthorship: Candèze, 1873; Location: country: Japan; locality: Aseri, Kyotanba Town, Kyoto Pref., 14.VI.2014, Satoshi Kubo leg. ; Record Level: basisOfRecord: Preserved Specimen

Description

Morphology of the intersex Pectocera fortunei

The body overall exhibits female traits, except for the antennae (Figs 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4 ). The head displays relatively small eyes and mandibles resembling those of a typical female (Fig. 3 View Figure 3 ). The lateral margins of the pronotum are convex and arcuate, narrowing towards the posterior angles, as typically seen in females (Fig. 3 View Figure 3 ). The antennae are pectinate, similar to those of a typical male and asymmetrical between the left and right sides, with nine irregularly transformed flagellomeres (Fig. 4 View Figure 4 ). The genitalia are fully developed and identical to a typical ovipositor (Fig. 5 View Figure 5 ).

Behavioral interactions between an intersex and a typical female

To examine the b ehavioural interactions between an intersex individual and a typical female, one of each was placed in a single breeding case for observation. As a result, they exhibited only biting and aggressive behaviour, with no mating behaviour observed.

Notes

In P. fortunei , the prominent male sexual characteristics include pectinate antennae, relatively large eyes and a narrow pronotum (Figs 2 View Figure 2 , 3 View Figure 3 ). In the observed specimen, only female sexual characteristics were displayed in all body parts, including the genitalia, except for the antennae (Figs 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4 , 5 View Figure 5 ). The antennae exhibited a pectinate pattern similar to that of a male. However, the nine flagellomeres appeared as if the female flagellomeres had been transformed into a slender and elongated shape like those of a male (Fig. 4 View Figure 4 ). Consequently, it was ambiguous to clearly identify this as a distinct male trait; thus, the specimen was classified as intersex. This is the first record for this family.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Elateridae

Genus

Pectocera