Sivis odpo, Vršanský, 2009

Vršanský, Peter, 2009, Albian cockroaches (Insecta, Blattida) from French amber of Archingeay, Geodiversitas 31 (1), pp. 73-98 : 86-87

publication ID

https://doi.org/ 10.5252/g2009n1a7

persistent identifier

https://treatment.plazi.org/id/754F87A2-9920-7072-FCDE-66FDC386F937

treatment provided by

Marcus

scientific name

Sivis odpo
status

sp. nov.

Sivis odpo n. sp. ( Figs 6 View FIG ; 8 View FIG -10; 16C)

TYPE MATERIAL. — Holotype specimen ARC-89.2, a complete?2nd instar larva. Paratype specimen ARC- 037b2, a complete?2nd instar immature.

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

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

ETYMOLOGY. — After odporučenie (Slavic for recommendation).

DESCRIPTION

Specimen ARC-89.2 ( Fig. 16C View FIG )

Head globular (0.7/ 0.64 mm), eyes strongly cut around the antennal articulation and projected beyond the head outline. Mandible very long, with at least six small sharp teeth. Antenna long, with segments very wide, third segment the largest (0.16/ 0.07 mm). Segments 4-7 with one set of 7 or 8 sensilla chaetica, segments 8 and 9 with two sets, and apical segment with three sets of sensilla chaetica.

Maxillary palp four- or five-segmented (?/0.15/ 0.11/0.16/ 0.2 mm), apical segment very wide (0.13 mm), cup-like.

Pronotum almost quadrate in outline (0.75/ 0.55 mm), meso- and metanotum very wide (0.86 mm; 0.91 mm). Marginal setae (10 on pro-, meso-, and metanotal posterior margin) very long (up to 0.12 mm). Overall length 1.9 mm.

Cockroaches ( Insecta, Blattida ) from Mesozoic French amber

ARC-037b2 ( Figs 7 View FIG -9)

Head width 0.84 mm; pronotum (1.05/ 0.68 mm), meso- and metanotum wide (1.21 mm; 1.32 mm). Cercus 0.58 mm long. Overall length 2.32 mm.

REMARKS

The holotype is preliminary categorized into the second instar, because the head is projected beyond the pronotum outline only in the first two instars, and the head is partially concealed by pronotum – a state common in the second instar. Specimen ARC-037b2 is an older, apparently the next, third instar. The proportion of the holotype, multiplied by 1.4 (Dyar’s rule) roughly fit the above presumption.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Blattodea

Family

Mesoblattinidae

Genus

Sivis

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