Tetraneura sp.

Watanabe, Tomoko, Lee, Wonhoon, Sano, Masakazu, Murakami, Keisuke & Akimoto, Shin-Ichi, 2022, Taxonomic revision of the Tetraneura akinire species group (Insecta, Aphididae, Eriosomatinae), with description of a new species and a correction of a nomenclatural confusion, Zootaxa 5183 (1), pp. 162-186 : 165

Undescribed species, Tetraneura sp. O

Greenish and globular galls of a Tetraneura species sometimes coexist with reddish and spindle-shaped galls of T. akinire sensu novo on the same tree of U. davidiana var. japonica in Hokkaido, northern Japan. The former species has been treated as T. sp. O ( Akimoto 1995; Akimoto & Yamaguchi 1994, 1997; Tomisawa & Akimoto 2004; Muramatsu & Akimoto 2014, 2016). This species is reported to be smaller in the first instar fundatrix ( Akimoto & Yamaguchi 1997), with completely smooth tarsi in the first instars of the root generation. According to the criteria of Hille Ris Lambers (1970), this species is classified as T. akinire sensu Hille Ris Lambers (1970) ; however, in addition to the smaller body size of fundatrix first instars, molecular analyses indicated that the species has distinct sequences from T. akinire in the mitochondrial COI gene, but is closely related to T. akinire and T. sorini , forming the T. akinire species group (see Results and Discussion). We describe this species as new to science under the name of T. ovaliformis sp. nov. Similar globular galls were collected from U. davidiana in South Korea. The specific status of the Korean gall formers will be discussed based on morphological and molecular information.