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First record of Heteragrion cooki from Peru (Odonata: Heter agrionidae)
Emmy F. Medina-Espinoza
Departamento de Entomología, Museo de Historia Natural de la Universidad Nacional Mayor de San Marcos, Av. Arenales 1256, Jesús María, Lima, Perú; [email protected]
Abstract. Heteragrion cooki is reported from Peru for the first time based on a specimen col- lected in Cerros de Amotape National Park, Tumbes, Peru. This record expands the distribu- tion of this species which previously was only known from Ecuador. Further key words. Damselfly, Zygoptera, new record, Andes
Introduction The genus Heteragrion Selys, 1862, currently comprises 57 species (according to Stand-Pérez et al. 2019, Vilela et al. 2019, and Ávila-Junior et al. 2020), eight of which are found in Peru (Hoffmann 2009): H. aequatoriale Selys, 1886, H. an gustipenne Selys, 1886, H. aurantiacum Selys, 1862, H. bariai De Marmels, 1989, H. flavidorsum Calvert, 1909, H. icterops Selys, 1862, H. inca Calvert, 1909, and H. melanurum Williamson, 1919. Heteragrion cooki Daigle & Tennessen, 2000, has previously been reported only from Ecuador (Tennessen & Mauffray 2016), on the western slopes of the Andes in the provinces of El Oro, Guayas, Loja, Los Ríos, Santo Domingo de los Tsáchilas, Bolívar, Cañar, and Manabí (Mauffray & Tennessen 2019).
Study site and methods ‘El Caucho’ Biological Station in Cerros de Amotape National Park, Tumbes, Perú, is located in a forest characterised by a semi-arid climate and low seasonal rainfall, classified as seasonally dry hill and mountain forest according to MINAM (2019). A male Heteragrion was collected in ‘Las Pavas’ stream around ‘El Caucho’ Bio- logical Station (03°49’39.8’’ S, 80°15’29.1’’ W, 341 m a.s.l.; Fig. 1) on 27-ix-2019. The specimen was identified and lodged in the Entomology Department of the Museo de Historia Natural de la Universidad Nacional Mayor de San Marcos (MUSM), Lima, Peru. Classification ofHeteragrion groups and terminology follows Lencioni (2013). After determining which group the specimen corresponded to, several ref- erences, including Daigle & Tennessen (2000), De Marmels (2004), Macha do (2006), Lencioni (2013), Machado & De Souza (2014), Machado (2015), Ávila-Junior et al. (2017), and Vilela et al. (2019) were used for species identi- fication. The distribution map was produced with data from the analysis carried out by Tennessen & Mauffray (2016) in the IUCN red list assessment of H. cooki and
Notulae odonatologicae 9(6) 2020: 236-240229-275 – DOI:10.5281/zenodo.4268583 237 data provided by K.J. Tennessen for the following Ecuadorian provinces: Bolivar, Guayas, Los Ríos, Manabí, and Santo Domingo de los Tsáchilas (formerly part of Pichincha).
Results According to Lencioni´s (2013) classification, the specimen belongs to group A, based on the lack of elongated paraprocts (Figs 2a–c). Within the group, Heter agrion cooki is distinguished by the combination of the following characters of the cercus: i) having in medio-dorsal view, a ventral expansion and a wide medial proc- ess with a triangular plate apically slightly bifurcated with one ridge crossing the process (Fig. 2b); ii) in lateral view, with ventro-basal expansion small (less than ⅓ of cercus length; Fig. 2c). Heteragrion dorsale Selys, 1862, is the one group A species for which information on the caudal appendages is lacking as the type material has lost that section (Machado 2006). However, the thoracic pattern provides char-
Fig. 1. Habitat of Heter agrion cooki at ‘Las Pa- vas’ stream around ‘El Caucho’ Biological Sta- tion, Cerros de Amotape National Park, Tumbes, Perú (27-ix-2019). Photo: Mabel Alvarado
Notulae odonatologicae 9(6) 2020: 229-275 238 acters to differentiate it from other species. Heteragrion cooki lacks of stripes over the metepisternum and metepimerum, a typical character in H. dorsale (Macha do 2006). Moreover, the specimen has the mesepisternum dark brown dorsally, mesepimerum brown dorsally, dull yellow ventrally, and metepimerum yellow with a dark dash distally, clearly matching the pattern described for H. cooki by Daigle & Tennessen (2000) (cf. Fig. 3).
Discussion Ecuadorian Loja province, the southernmost record for H. cooki up to this report (Tennessen & Mauffray 2016), along with Cerro de Amotape National Park (study area) are located in the low-elevation sector of the Andes found between the Girón-Cuenca depression (Ecuador) and the Huancabamba depression (Peru) (Richter & Moreira-Muñoz 2005). The latter is also considered the southern limit of the northern Andes (Novoa et al. 2011). This could explain the presence of H. cooki in the North of the Peruvian territory since there is no biogeographical barrier until the Huancabamba depression that differentiates the Peruvian Andes from the Ecuadorian ones.
Fig. 2. Caudal appendages of Heteragrion cooki. a – in dorsal, b – in medio-dorsal, c – in lateral view.
Fig. 3. Thorax of Heter agrion cooki in lateral view.
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Fig. 4. Distribution ofHeteragrion cooki with the topographical positions of collecting sites.
Acknowledgements. I am very grateful to Dr Kenneth J. Tennessen, who kindly corrobo- rated the species identity, provided data about its location, and reviewed the manuscript. I would also want to express my gratitude to Dr Mabel Alvarado for reviewing previous version of the document and giving her valuable comments. Field collections in Cerros de Amotape National Park were financed by the Universidad Nacional Mayor de San Marcos (project R.R. 03556-R-19, B19100641) and under permit N° 009 2019 SERNANP JEF issued by the Servicio Nacional de Áreas Naturales Protegidas por el Estado-Perú.
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