The Burlingiidae (Trilobita): revised generic composition, stratigraphy, and the first species from the early Middle Cambrian of West Gondwana

Geyer, Gerd; Corbacho, Joan

doi:10.1080/11035897.2015.1027266

Cited by 5 publications

(22 citation statements)

References 18 publications

(32 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The diagnosis of Geyer & Corbacho () is followed with the emendation that the genus may have a variably expressed median preglabellar ridge.…”

Section: Systematic Palaeontologymentioning

confidence: 99%

“…Burlingiids were probably pelagic and hitherto 5 genera and at least 20 species have been identified globally through the unnamed Stage 4 to the Guzhangian Stage of the Cambrian (Jell & Hughes ; Ebbestad & Budd ; Peng et al . ; Geyer & Corbacho ; Yuan & Esteve ). Phylogenetic analyses suggest that the Burlingiidae is monophyletic although its ancestral relationship with other trilobites remains unresolved (Ebbestad & Budd ; Geyer & Corbacho ).…”

mentioning

confidence: 99%

“…; Geyer & Corbacho ; Yuan & Esteve ). Phylogenetic analyses suggest that the Burlingiidae is monophyletic although its ancestral relationship with other trilobites remains unresolved (Ebbestad & Budd ; Geyer & Corbacho ).…”

mentioning

confidence: 99%

“…). A recent revision thus lead to the erection of two new genera for these taxa, Niordilobites Geyer & Corbacho, and Pengia Geyer & Corbacho, respectively, as well as a third genus Alumenella Geyer & Corbacho, for B. jagoi (Whittington, ). Ebbestad & Budd () had moved this species from Schmalenseeia to Burlingia , recognizing the many character traits incompatible with a placement in Schmalenseeia .…”

mentioning

confidence: 99%

See 3 more Smart Citations

Extreme protomeric development in a burlingiid trilobite from Cambrian glacial erratics of Denmark

Ebbestad

Weidner²

2017

Palaeontology

View full text Add to dashboard Cite

Pengia Geyer & Corbacho is a Cambrian burlingiid trilobite with fused trunk segments devoid of any articulation in the anamorphic and epimorphic phases of development. The type species is Pengia fusilis (Peng et al.) from the Wanshania wanshanensis Zone of China. Here we describe a second species, Pengia palsgaardia sp. nov., from the Lejopyge laevigata Zone of the Paradoxides forchhammeri Superzone. It comes from a glacial erratic in Denmark which probably originated in the Alum Shale Formation of Västergötland, Sweden. Pengia palsgaardia is a large burlingiid (~10 mm in length), with 14 fused segments in the trunk whose boundaries are marked by ridges. The axis is narrow, with the axial furrows faintly indicated or effaced across the median. Laterally along the axis and the tapering glabella, symmetrical globular lobes are developed that are pinched at their base. During ontogeny the glabellar furrows are pit‐like adaxially but shallow towards the axial furrow as the globular lobes develop. Their pit‐like appearance in Pengia palsgaardia and some other burlingiid species is not considered similar to the condition seen in oryctocephalid trilobites. A median preglabellar ridge resembling that of Schmalenseeia Moberg develops late in ontogeny but in early ontogeny the preglabellar field resembles that of Burlingia Walcott, Alumenella Geyer & Corbacho and Niordilobites Geyer & Corbacho. This gives Pengia a more basal position in the schmalenseeid lineage, outside the derived Schmalenseeia. In mature specimens the facial sutures in P. palsgaardia are fused, but an ocular suture may have been present. During ontogeny Pengia would have gone through the anamorphic and protomeric protaspid segmental conditions, but articulation between either the cephalon and pygidium, or pygidium and thoracic segments of the trunk never developed so it did not progress beyond the protaspid phase. This extreme protomeric development is considered to be a derived feature in Pengia.

show abstract

“…The diagnosis of Geyer & Corbacho () is followed with the emendation that the genus may have a variably expressed median preglabellar ridge.…”

Section: Systematic Palaeontologymentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Extreme protomeric development in a burlingiid trilobite from Cambrian glacial erratics of Denmark

Ebbestad

Weidner²

2017

Palaeontology

View full text Add to dashboard Cite

show abstract

“…Throu gh his 'Fosilart' com pany he has annou nced tw o m ore papers and a book on Ord ovician Moroccan trilobites, ed ited by the Geological Mu seu m of the Sem inary of Barcelona. Besid es this geological per iod , Mr. Corbacho has exp and ed -occasionally send ing m aterial to professional p aleontologists -to the stu d y of the Cam brian trilobites of Morocco (Geyer and Corbacho, 2015) as w ell as Devonian trilobites from the Anti-Atlas López-Soriano, 2013a, 2013b;Corbacho, 2014aCorbacho, , 2014cBignon et al, 2014). Finally, Mr. Corbacho has sent som e non -trilobite fossils to a Czech specialist p rod u cing tw o joint notes (Valent et al, 2013;Valent and Corbacho, 2015), and recently has w ritten general papers Corbacho and H amm ond , 2017) …”

Section: The 'Corbacho Affair'mentioning

confidence: 99%