Discussion

The typical genal spines (length  5,4mm sym. T1 u. 2,7mm sym. T2) and also the macropleurals (length 8,4mm sym. T1 u. 4mm T2) are present at the two juveniles. There's a tubular fringe around the perimeters of the relatively semicircular big cephalon at both Trilobites (T1- L= 4,4mm, B= 9,8mm; T2- L= 4,0mm, B=9mm). The big and elongated glabellas (T1- L= 4,2mm, B= 3,4mm; T2- L= 3,4mm, B= 2,9mm) widens anteriorly, are well segmented by deep glabellar furrows. The fixigenae like the librigenae are well articulated. There are exceptional palpebral lobes.

Fulcrate Thorax with pleures, ending in tips. Deep pleural furrows. Both Trilobites probably with 14 segments (amount of pleures), cause the posterior segments and pygidia are partly damaged, so missing segments can't be excluded.

The pygidia are typically very small.

Abbreviatons

B, L

sym.

Tx

- Width, length;

- The sizes of the parts at one lobe are equal to its opposites;

- Differentiation of items in case of multiple items are present on the matrix

Survey of images

Paradoxides gracilis (I_01).. (I_06)

General Informations

Locality

Formation

 Prague basin, Jince, Czech Republic

 Laatchana Formation

Stratigraphy

 Middle Cambrian

Age

 Order Redlichiida\ Suborder Redlichiina\ Superfamily Paradoxidoidea\ Family Paradoxididae

Discussion

One of my favourites, the representative of Redlichiida Paradoxides gracilis :-)))

Unfortunately, the genal spines are missing at this adult specimen (alas as all too often) :-(

This little guy has a sagittal length of 8,02cm (total length including thoracic spines is 9,70cm).

The big semicircular cephalon has a maximum width of 5,20cm and a length of 2,60cm; broad glabella anterior expanding; significant segmented; S1 and S2 undulating lateral the complete glabella, S3 implied; occipital ring with perceptible nod; no preglabellar field; glabella sagittal vaulted to the anterior border; transocular fixigenae highly developed; eye ridges accurately defined.

The thoracic length is 4,92cm (excluding spines) and the anterior maximum width is 4,15cm; 20 well defined thoracic segments; the long thorax is posterior tapering; rachis highly vaulted, tapering posterior; significant dorsal furrows; pleures ending in spines; macro pleures at the 2. segment indicated; deep pleural furrows running oblique; long pleural spines at the 20. segment (2,7cm), ending posterior the pygidium.

The narrow pygidium has 2 Segments, with predominantly terminating segment.