Blattula dubia (Handlirsch, 1939) Vrsansky & Ansorge, 2007

Vrsansky, Peter & Ansorge, Jörg, 2007, Lower Jurassic cockroaches (Insecta: Blattaria) from Germany and England, African Invertebrates 48 (1), pp. 103-126 : 122

Blattula dubia (Handlirsch, 1939) , comb. n.

Fig. 16

? Chiloblattula dubia: Handlirsch 1939: 62 , pl. 5, fig. 89.

Diagnosis: One of smallest known blattulids, with forewing length 4.5– 6 mm and venation reduced to some 20 veins.

Description: Forewing with venation reduced to some 20 veins. R with about 7 veins; M with about 3; Cu with about 4. Hindwing with R1 and RS (3–5+3–5); M with 2 or 3 branches; Cu with 4–5+1 branches; A1 with at least two branches.

Holotype (examined): FGWG 123 /31, isolated hindwing. GERMANY: Mecklenburg : former clay pit of Schwinz , near Dobbertin; carbonate concretions of the marine “Green Series” clay, Lower Toarcian, exaratum Subzone.

Additional material examined: Dobbertin, hindwing LDA 304/1; Grimmen, forewing LGA 1725.

Remarks: The species differs from B. langfeldti in having a rounded forewing margin and in having more reduced venation, which results from the smaller size of this species. Although not found in association with a hindwing, a very small isolated forewing LGA 1725 from Grimmen most likely belongs to this species.

Figures

Fig 16. Blattula dubia (Handlirsch, 1939), wing venation: (A) LGA 1725, forewing, Lower Toarcian of Grimmen; (B) FGWG 123/31, hindwing, holotype of?Chiloblattula dubia Handlirsch, 1939, Lower Toarcian of Dobbertin.