Lithocorydalus fuscata

Jepson, James E. & Heads, Sam W., 2016, Fossil Megaloptera (Insecta: Neuropterida) from the Lower Cretaceous Crato Formation of Brazil, Zootaxa 4098 (1), pp. 134-144: 141

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Lithocorydalus fuscata


Lithocorydalus fuscata  gen. et sp. nov.

Figure 2View FIGURE 2. A

2007 Megaloptera  gen. et sp. nov.: Martins-Neto et al. p 331, 339, fig. 11.69 c.

Etymology. From fuscous meaning ‘dark’ in reference to the dark wings of the specimen.

Type material. SMNSAbout SMNS 66000 - 248, almost complete insect preserved ventral side up, from the Crato Formation, Brazil, Lower Cretaceous, Aptian.

Diagnosis. As for genus.

Description. Forewing: 17.9 mm long, 5.5 mm wide. C complete, 15 subcostal veinlets, costal area narrows distally. Sc and R 1 close together throughout length, most likely fusing distally towards wing apex (fusion not preserved). Rs+MA at acute angle from R 1. Rs poorly preserved, termination of Rs 1, Rs 2 not preserved. MA continues at acute angle, simple for most of its length, termination not preserved. Two rs 1 -ma crossveins preserved. MP deeply forked, MP 1, MP 2 simple. One ma-mp 1 crossvein preserved. CuA poorly preserved. CuP and anal veins not preserved.

Hind wing: 17.6 mm preserved length. C complete, costal area narrow with 15 subcostal veinlets preserved. Sc and R 1 close together throughout length, fusing distally, fusion not preserved. Three rs-r 1 crossveins preserved. Rs originating distally before mid point of wing, fusing with MA after very short distance. Rs with three branches One crossvein preserved in radial sector. Free branch of MA long, forming a long narrow cell between it and R. RS+MA at acute angle, MA continues at same angle, straight and simple. Two nygmata present between MA and MP, before fork of MP and at mid point of vein between MA and MP. MP deeply forked before midpoint of vein. MP 1, MP 2 simple. Three ma-mp 1 crossveins preserved. Cu deeply forked (fork not preserved); CuA and CuP poorly preserved. One mp-cua crossvein preserved. Anal veins not preserved.

Body. Preserved ventral side up. Head 3 mm long, 3.3 mm wide. Eyes 1.3 mm long, 0.6 mm wide. Antennae partially preserved, 15 flagellomeres on the right and 13 on the left. Scape preserved, 0.3 mm long, 0.4 mm wide. Mouthparts, Mandibles preserved with serrated edge, 0.9 mm long, 0.8 mm wide. Prothorax incomplete, 1.8 mm long, 2.9 mm wide. Mesothorax 2.3 mm long, 4.3 mm wide. Metathorax 1.7 mm wide, 4.3 mm wide. Legs poorly preserved. Femur incomplete, tibia 2.3 mm long, no tibial spur, 4 th tarsal segment simple. Abdomen 8.3 mm long.


Staatliches Museum fuer Naturkund Stuttgart