Globula lake, 2009

Vršanský, Peter, 2009, Albian cockroaches (Insecta, Blattida) from French amber of Archingeay, Geodiversitas 31 (1), pp. 73-98 : 81

Globula lake n. sp. ( Figs 3 ; 15 ; 16D )

TYPE MATERIAL. — Holotype specimen ARC-309.2, a complete immature. Paratypes specimens ARC-60, an immature and ARC-263.14, a hind leg.

TYPE LOCALITY. — Archingeay-Les Nouillers, Charente- Maritime, SW France.

ETYMOLOGY. — Lake is after Malvina Lak, who provided synchrotron images for this publication.

STRATIGRAPHIC HORIZON. — Lower Cretaceous, uppermost Albian, lithological subunit A1sl2 sensu Néraudeau et al. (2002).

DESCRIPTION

ARC-309.2, a complete immature

Head height 0.7 mm, antenna width 0.04 mm. Maxillary palps (three apical segments: 0.18/0.17/ 0.14 mm), the two terminal segments with two distinct longitudinal dorsal ridges, terminal segment with 8 apical short, slender sensilla chaetica.

Fore femur long and narrow (0.70/ 0.18 mm), tibia also long (0.54/ 0.08 mm), tarsus very long (0.17/0.08/0.11/0.06/ 0.16 mm). Mid femur robust (0.56/ 0.19 mm), tibia short (0.71 mm), tarsus long (0.13/0.12/0.13/0.06/ 0.19 mm). Hind femur slender (0.79/ 0.18 mm), with massive long terminal spur (0.43 mm), tibia very long (1.18/ 0.06 mm), tarsus very long (0.30/0.21/0.15/0.09/ 0.22 mm).

ARC-263.14, hind leg

Coxa very short, but unusually wide, dark, with characteristically reticulated surface. Other parts of the extremity pale (without coloration). Femur almost round in section, comparatively long and narrow (1.21/ 0.35 mm), with extremely long terminal spur (0.49 mm).Some of tibial spurs are also unusually long (0.50 mm).Tibia medium-sized, 1.7 mm long. Both femoral and tibial sensilla chaetica are sparse, tarsus (0.91 mm) dark, with numerous sensilla chaetica.

ARC-60

Very early instar,with metanotum width 0.95mm;body width 0.88 mm; and cercus length 0.49 mm.

REMARKS

Specimens ARC-263.14 and ARC-60 can be categorized as belonging to the present taxon based on the very long hind femoral apical spur.

Figures

FIG. 3. — Immature of Globula lake n. gen., n. sp. (left), holotype ARC-309.2,and specimen of uncertain family.Distance between apexes of two heads 3.2 mm.

FIG. 15. — Immature of Globula lake n. gen., n. sp., holotype ARC-309.2 (left) and specimen of uncertain family. Distance between apexes of two heads 3.2 mm.

FIG. 16. — A, immature of Globula lake n. gen., n. sp. (Blattulidae), specimen ARC-60, dorsal view of complete specimen; B, immature of Batola nikolai n. gen., n. sp. (Blattulidae), ventral view of terminalia; C, immature of Sivis odpo n. gen., n. sp. (Mesoblattinidae), holotype ARC-89.2, dorsal view of complete specimen; D, leg of Globula lake n. gen., n. sp., specimen ARC-263.14; E, leg of B. nikolai n. gen., n. sp., specimen ARC-138; F, unidentified legs of Caloblattinidae, specimen ARC-152.3; G, H, leg of B. nikolai n. gen., n. sp., specimen ARC 57.2.