Essigella domenechi , Thery, Thomas, Kanturski, Mariusz & Favret, Colin, 2018

Thery, Thomas, Kanturski, Mariusz & Favret, Colin, 2018, Molecular data and species diagnosis in Essigella Del Guercio, 1909 (Sternorrhyncha, Aphididae, Lachninae), ZooKeys 765, pp. 103-122: 104

publication ID

http://dx.doi.org/10.3897/zookeys.765.24144

publication LSID

lsid:zoobank.org:pub:BD00760D-C946-4110-8C86-8CA2872C7CE3

persistent identifier

http://treatment.plazi.org/id/390343A7-D620-4578-93A8-A5BBBF7FE00F

taxon LSID

lsid:zoobank.org:act:390343A7-D620-4578-93A8-A5BBBF7FE00F

treatment provided by

ZooKeys by Pensoft

scientific name

Essigella domenechi
status

sp. n.

Essigella domenechi  sp. n. Figure 1d

Holotype.

viviparous aptera, USA, California, Alpine Co., 38.328°N 119.637°W, 10.vii.2013, on Pinus albicaulis  , T. Théry & C. Favret leg. (USNM). Paratypes. 8 viviparous apterae, same data as holotype ( QMOR, CTT).

Diagnosis.

Like species of the E. californica  complex and E. pini  , E. domenechi  sp. n. has its 3rd and 4th abdominal dorsal terga usually bearing six setae. The species can be distinguished from E. patchae  by the presence of rows of spinules on the URS (absent or faint in E. patchae  ; Fig. 2b, d); from E. pini  by a relatively elongate URS with subparallel lateral margins (URS with margins rounded and convergent at base in E. pini  ; Fig. 2a, c); from E. gagnonae  sp. n. and E. sorenseni  sp. n. with the following characters: tibiae and femora more or less concolorous showing almost or same color as that of body (pro- and metatibiae and metafemora conspicuously darkened in E. sorenseni  sp. n., pro- and metatibiae sometimes slightly darkened in E. gagnonae  sp. n.), dorsal tegument thick; width of head between eyes = 300.7 ± 14.2 (289.0 ± 13.3 for E. gagnonae  sp. n., and 353.6 ± 15.3 for E. sorenseni  sp. n.); ratio of 3rd / 5th antennal segments < 1.6 (< 1.6 for E. gagnonae  sp. n. but > 1.6 in E. sorenseni  sp. n.); overall pubescence short or medium-sized with average length of the longest dorsal seta of metafemora = 29.7 ± 4.2 (59.8 ± 9.8 for E. gagnonae  sp. n., and 51.2 ± 10.7 for E. sorenseni  sp. n.; average length of the longest ventral seta of metafemora = 32.6 ± 4.5 (43.1 ± 5.4 for E. gagnonae  sp. n., and 54.4 ± 5.6 for E. sorenseni  sp. n.); average length of the longest dorsal seta of metatibiae = 44.0 ± 8.1 (85.7 ± 10.8 for E. gagnonae  sp. n., and 76.4 ± 15.8 for E. sorenseni  sp. n.); average length of the longest ventral seta of metatibiae = 37.5 ± 7.0 (49.4 ± 9.5 for E. gagnonae  sp. n., and 67.7 ± 12.0 for E. sorenseni  sp. n.); average length of the longest frontal seta = 32.6 ± 7.5 (58.7 ± 8.3 for E. gagnonae  sp. n., and 53.4 ± 11.9 for E. sorenseni  sp. n.); average number of setae of the genital plate = 22.0 ± 2.1 (23.6 ± 2.1 for E. gagnonae  sp. n., and 31.6 ± 1.7 for E. sorenseni  sp. n.). Essigella domenechi  sp. n. is morphologically not distinguishable from E. californica  , the latter being highly variable, nor from E. hoerneri  . Essigella domenechi  sp. n. can be separated from E. californica  , E. gagnonae  sp. n., E. hoerneri  and E. sorenseni  sp. n. with the DNA characters shown in Table 1.

Description.

Viviparous apterae (prepared specimens): body with pale tegument, with visible pigmented scleroites; dorsal tegument visibly thicker, sclerotized. Legs quite pale, concolorous, more or less the same color than that of body. Antennae pale, the 5th, the 4th and the apical third part of the 3rd segment of antennae darkened. URS elongated, with lateral margins subparallel, bearing rows of spinules. Overall pubescence short to medium-sized, dorsal setae of appendages incrassate, ventral ones acute. Terga of abdominal segments 3 and 4 with six dorsal setae. Genital plate with 19-25 setae (22.0 ± 2.1) (n = 6). Cauda obvious but not too protruding, apically rounded, slightly turned upward. BL: 1600-2100 (1800 ± 170) (n = 7). HWE: 283.2-326.0 (300.7 ± 14.2) (n = 7), LAIII: 162.2-184.6 (171.8 ± 6.5) (n = 13), LAIV: 96.4-106.7 (101.0 ± 4.1) (n = 9), LAV: 113.7-124.4 (120.2 ± 4.1) (n = 5), LPRIV: 20.8-25.8 (23.0 ± 1.6) (n = 9), LPRV: 17.6-21.9 (19.6 ± 1.4) (n = 9), LPT: 8.5-14.5 (11.9 ± 1.9) (n = 9), LURS: 71.4-79.2 (75.2 ± 2.8) (n = 6), LMF: 675.7-728.8 (708.3 ± 24.2) (n = 6), WMF: 68.2-77.3 (74.9 ± 2.9) (n = 11), LMT: 975.1-1074.4 (1027.8 ± 38.2) (n = 9), WMT: 36.8-43.9 (41.4 ± 2.2) (n = 12), WS: 36.7-43.5 (40.4 ± 2.2) (n = 9), LMB: 107.2-114.4 (110.9 ± 2.3) (n = 11), LMD: 189.4-206.4 (194.9 ± 6.9) (n = 11), LFS: 18.7-39.5 (32.6 ± 7.5) (n = 7), LDMFS: 25.2-36.8 (29.7 ± 4.2) (n = 12), LVMFS: 26.1-44.0 (32.6 ± 4.5) (n = 12), LDMTS: 33.7-61.8 (44.0 ± 8.1) (n = 12), LVMTS: 24.7-48.1 (37.5 ± 7.0) (n = 12).

Comments.

USA, California, on Pinus albicaulis  Engelmann, known from Stanislaus National Forest at high elevation (type series). The species probably occurs in other high mountains where P. albicaulis  is present. This species corresponds to the E. californica  population living on P. albicaulis  (cluster H3) shown in Théry et al. (in press).

Etymology.

This species is dedicated to Boris Domenech, PhD student at the University of Montreal (QC, Canada) for his comments in genetic analyses with which the species was discovered.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Aphididae

Genus

Essigella