Oisedicus maginus, Drohojowska, Jowita & Szwedo, Jacek, 2013

Drohojowska, Jowita & Szwedo, Jacek, 2013, The first Aleyrodidae from the Lowermost Eocene Oise amber (Hemiptera: Sternorrhyncha), Zootaxa 3636 (2), pp. 319-347 : 322-324

Oisedicus maginus sp. n.

( Figures 1–14 )

Diagnosis. As for genus.

Description. Measurements are given in Table 1 . Antennae 8-segmented. Antennal segment III twice as long as segment II; IV and V subequal in length. Compound eye distinctly divided; ommatidia in upper portion larger than those in lower portion. Fore wing widened in apical half. Hind wing widened in apical half. Paronychium lingulate; setae of hind tibia evenly dispersed. Claspers tapered in apical half, shifted dorsad, slightly crossed. Aedeagus with small, hook-like apex.

Etymology. Specific epithet from the Proto-Celtic ‘magino’ meaning big, refers to its huge size in comparison with the others.

Age and occurrence. Lowermost Eocene, c. 55−53 Ma, Ypresian (Sparnacian), level MP7 of the mammal fauna of Dormaal (Feugueur 1963; De Ploëg et al. 1998; Nel et al. 1999, Cavagnetto 2000, De Franceschi & De Ploëg 2003, Nel et al. 2004, Nel & Brasero 2010). Department Oise, France, 43°N, 2.7°E; palaeocoordinates 44.8°N, 0.1°E; palaeocoordinates based on nearby landmark (Paleobiology Database 2013).

Material. Holotype, male. Specimen No. MNHN PA 2493 , mounted on slide, preserved in Canada balsam. Mesothorax and metathorax covered with gas bubble, apical portion of abdomen and apical portion of hind wing covered with gas bubbles .

Figures

FIGURES 1–4. Oisedicus maginus gen. et sp. n. 1—body, lateral view; 2—antenna; 3—hind leg; 4—hind tarsus.

FIGURES 5–6. Oisedicus maginus gen. et sp. n. 5—fore wing; 6—hind wing.

FIGURES 7–14. Oisedicus maginus gen. et sp. n. 7—body, lateral view; 8—basal segments of antenna; 9—IIIrd and IVth segments of antenna; 10—Vth–VIIIth segments of antenna; 11—legs; 12—hind tarsus; 13—fore wing; 14—hind wing.

Tables

TABLE 1. Basic measurements of the specimens (in mm).

	Clodionus fizoli sp. n.	Isaraselis cladiva sp. n.	Lukotekia menae sp. n.	Lukotekia sp.	Oisedicus maginus sp. n.	indet, sp Aleurodicinae PA 17081
Body length total (including claspers	1.22	1.01	1.12	0.97	1.43	0.96
Head length along mid line	0.10	–	0.097	0.08	–	0.076
Head including compound eyes width	0.29	–	0.27	0.27	–	0.26
Vertex width	0.17	–	0.17	0.165	–	0.16
Antennal segment I	–	0.02	0.014	0.02	–	0.03
Antennal segment II	0.06	0.051	0.069 left/ 0.07 right	0.07	0.064 left/ 0.068 right	0.07
Antennal segment III	0.08	0.11	0.13	0.12	0.19 left/ 0.23 right	0.1
Antennal segment IV	0.05	0.029	0.044 left/ 0.033 right	0.037	0.11 left/ 0.11 right	0.05
Antennal segment V	0.05	0.036	0.056 left/ 0.054right	0.05	0.10	0.04
Antennal segment VI	0.04	0.034	0.052 left/ 0.05 right	0.04	0.80	0.07
Antennal segment VII	0.053	0.034	0.08 left/ 0.072 right	0.04	0.04 left/ 0.038right	0.03
Antennal segment VIII	0.052	0.032	0.048 left/ 0.06 right	0.06	0.035 left/ 0.036 right	0.05
Fore wing length	0.98 left/ 1.0 right	0.89	1.13 left/ 1.11 right	–	1.76	0.93
Fore wing width	0.37/0.40	0.36	0.49 left/ 0.47 right	–	0.78	0.37
Hind wing length	0.87/0.90	0.71	0.92 left/ 0.90 right	–	1.33	0.72
Hind wing width	0.30/0.34	0.29	0.38left/ 0.39 right	–	0.64	0.28
Leg I femur+ trochanter cummulative length	–	–	0.26 left/ 0.24 right	0.17	0.22	–
Leg I tibia length	–	–	0.24 left/ 0.2 right	0.19	0.51	–
Leg I basitarsomere length	0.05	0.053	0.073 left/ 0.082 right	0.067	0.16	0.05
Leg I apical tarsomere length	0.05	0.054	0.069 left/ 0.073 right	0.067	–	0.05
Leg I claw length	0.02	0.028	0.03 left/ 0.039 right	0.014	0.04	0.03
Leg II length	0.2	0.21	0.27 left/ 0.25 right	0.17	0.41	0.19
Leg II basitarsomere length	0.076	0.081left 0.074 right	0.072 left/ 0.082 right	0.064	0.20	0.076

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