Delfinoia Nieto Nafria & Mier Durante

Nafria, Juan M. Nieto, Durante, M. Pilar Mier & Ciruelos, Sara I. Lopez, 2017, Delfinoia, a new South American aphid genus (Hemiptera, Aphididae, Macrosiphini) on Cayaponia (Cucurbitaceae), ZooKeys 671, pp. 49-60 : 51-52

Delfinoia Nieto Nafria & Mier Durante gen. n. Figs 2, 3, 4

Diagnosis.

Aphid genus belongig to tribe Macrosiphini ( Aphididae , Aphidinae) with primary sensoria on antennal segments V and VI with thick and non-ciliated edge (Fig. 4).

Description.

Macrosiphine aphid with (1) primary sensoria with thick and non-ciliated edge (Fig. 4), in addition to presence of (2) moderately divergent and smooth frontolateral tubercles and a small frontomedial tubercle and small frontal sinus in apterous viviparous females (Figs 2, 3A), (3) long antenna with long antennal segment VI terminal process (Fig. 2), (4) long and moderately swollen siphunculi (Figs 2, 3E), and also (5) secondary sensoria on antennae absent in apterous viviparous females and present on segment III in alate viviparous females (Figs 2, 3G), (6) penultimate and ultimate rostral segments provided with many robust, long and pointed setae (Fig. 3C), (7) first segments of tarsi with three setae, (8) dorsum scarcely sclerotized, mainly unpigmented in wingless forms and with marginal and intersegmental sclerites in winged forms (Fig. 2), (9) rugose and pale spiracular sclerites and circular or subcircular spiracular apertures (Fig. 3D), (10) truncated and short setae on most part of body dorsum and appendages (Fig. 3B), (11) siphunculi tenuously ornamented in the proximal part, smooth on remaining length, and provided with few and not always complete lines under the flange (Figs 2, 3E), (12) triangular and relatively short cauda (Table 1, Figs 2, 3F), and (13) dusky bordered forewing cubital veins in winged forms (Fig. 2).

Type species.

Amphorophora peruviana Essig, 1953.

Taxonomic discussion.

Ten genera and one subgenus of Macrosiphini known in the Americas have more or less developed and divergent or parallel frontolateral tubercles, long antennae and elongate swollen siphunculi (characters 2, 3 and 4); they are Amphorophora Buckton, 1876, Delphiniobium Mordvilko, 1914, Gibbomyzus Nieto Nafría, Pérez Hidalgo, Martínez-Torres & Villalobos Muller, 2013, Glabromyzus Richards, 1960, Hyperomyzus Börner, 1933, Illinoia Wilson, 1910, Rhopalomyzus Mordvilko, 1921 and Ucrimyzus Mier Durante & Pérez Hidalgo, 2013, Utamphorophora and Wahlgreniella , and the subgenus Picturaphis Blanchard, 1922 which is currently included in genus Microparsus Patch, 1909.

Feature 1 is the most distinctive character of the new genus, and is very exceptional in Macrosiphini , and features 5 to 13 in combination help to separate the new genus from any of the above mentioned genera, although they are present in some of them.

The novelty of the genus could be assured with complete certainty by the analysis of some genetic marker, which cannot be carried out at present because all the known material of the species is mounted on microscopic slides.

Etymology.

The name Delfinoia is in honour of Dr. Miguel Ángel Delfino (retired professor of entomology, University of Cordoba (Argentina), aphidologist and good friend for decades), who was the author of W. australis .