Rhipidoblattina geikiei ( Scudder, 1886 )

Vrsansky, Peter & Ansorge, Jörg, 2007, Lower Jurassic cockroaches (Insecta: Blattaria) from Germany and England, African Invertebrates 48 (1), pp. 103-126 : 113-114

Rhipidoblattina geikiei ( Scudder, 1886)

Figs 5 , 6

Mesoblattina geikiei: Scudder 1886: 454 , pl. 46, fig. 9.

Rhipidoblattina geikiei (Scudder) : Handlirsch 1906 –08: 429, pl. 40, fig. 20; 1939: 57, pl. 4, fig. 72.

Diagnosis: Forewing length 13.7 mm. Total number of veins at margin about 45–50. Clavus short.

Description: Wing margins more or less parallel; venation regular with reticulations between veins. Sc field shorter than clavus, with Sc 2- or possibly 3-branched. R slightly concave with most branches simple, rarely tertiary branched, with 16 veins at margin. M rich with 9 branches; Cu expanded, with 8 branches. Faint intercalaries present ( Fig. 5C ). Clavus comparatively short with 12 or 13 anal veins that are branched (A1–2 simple) with diagonal kink.

Holotype (examined): Isolated forewing, part and counterpart, NHML I. 10620, I. 11949. ENGLAND: Warwickshire: Browns Wood, Moreton Bagot; Lower Lias.

Blattaria incertae familiae Genus Eublattula Handlirsch, 1939 Eublattula crassivena Handlirsch, 1939

Fig. 7

Eublattula crassivena: Handlirsch 1939: 63 , pl. 5, fig. 91.

Diagnosis: Forewing more than 10 mm long, with thick branches and deeply curved R not reaching wing apex. Clavus with diagonal kink.

Description:Wing with very strong venation, 11–13 mm long (distal part of wing broken), kinked clavus overlapping basal third of wing, with about 11 veins and abundant fusions; Cu expanded (6–10 veins), almost reaching wing apex. M reduced to several branches. R curved with about 10 branches. Sc simple, forked.

Holotype (examined): FGWG 123 /32, isolated forewing. GERMANY: Mecklenburg : former clay pit of Schwinz , near Dobbertin; carbonate concretions of the marine “Green Series” clay, Lower Toarcian, exaratum Subzone.

Remarks:According to the vein branchings, the taxon seems to be a stem group member of the Blattulidae , or to belong to the Liberiblattinidae Vrsanský v, 2002.

Figures

Fig. 5. Rhipidoblattina geikiei (Scudder, 1886), holotype NHML I. 10620, I. 11949, forewing, Lower Lias of Browns Wood, Moreton Bagot, Warwickshire, England: (A, B) part and counterpart, (C) clavus at higher magnification.

Fig. 6. Rhipidoblattina geikiei (Scudder, 1886), holotype, details of forewing venation.

Fig. 7. Eublattula crassivena Handlirsch, 1939, holotype FGWG 123/32, Lower Toarcian of Dobbertin: (A) photograph of specimen, (B) details of venation.