Morphological assessment of the earliest paradoxidid trilobites (Cambrian Series 3) from Morocco and Spain

2017 ◽  
Vol 155 (7) ◽  
pp. 1566-1595 ◽  
Author(s):  
J. JAVIER ÁLVARO ◽  
JORGE ESTEVE ◽  
SAMUEL ZAMORA
Keyword(s):  
New Species ◽  
Statistical Analysis ◽  
Iberian Peninsula ◽  
Linear Measurement ◽  
Geometric Morphometric ◽  
Middle Cambrian ◽  
West Gondwana ◽  
Regional Correlation ◽  
Definition Of ◽  
Morphological Assessment

AbstractA Cambrian immigration event of paradoxidid trilobites has traditionally marked some regional lower–middle Cambrian boundaries in the Acado-Baltic subprovince (including Baltica and the Mediterranean and Avalonian margins of West Gondwana). The earliest paradoxidine species in Morocco and the Iberian Peninsula have been used as a chronostratigraphic link to support the definition of a common base for the Cambrian Series 3, but recent studies have proposed new species without revising previously established ones. This paper offers a morphological statistical analysis based on both linear measurement and landmark-based geometric morphometric approaches performed on the earliest paradoxinine trilobites sampled in the Anti-Atlas (Morocco) and the Iberian Chains (Spain). As a result, the diagnosis of Acadoparadoxides mureroensis is emended and several species recently erected in Morocco (A. cf. mureroensis, A. levisettii, A. ovatopyge and A. pampalius) are suggested as synonyms of A. mureroensis until 3D statistical analyses are available based on material preserved on carbonate or silica nodules. The first appearance of A. mureroensis in both areas can be provisionally used for regional correlation until homotaxic tests are checked.

Definition of Lepidocyrtus lusitanicus Gama, 1964 species-complex (Collembola, Entomobryidae), with description of new species and color forms from the Iberian Peninsula

Zootaxa ◽  
2008 ◽  
Vol 1917 (1) ◽  
pp. 38-54 ◽  
Author(s):  
EDUARDO MATEOS
Keyword(s):  
New Species ◽  
Iberian Peninsula ◽  
Geographical Distribution ◽  
Species Complex ◽  
Color Pattern ◽  
Color Variation ◽  
Body Color ◽  
High Similarity ◽  
Definition Of ◽  
Pattern Variability

Lepidocyrtus lusitanicus is one of the species with greater color pattern variability within the genus Lepidocyrtus. Four subspecies have been described in relation to its body color variation. The study of various populations of Lepidocyrtus from the Iberian Peninsula has allowed me to describe the new chromatic form L. lusitanicus form A, as well as the new species L. bilobatus, which is very closely related to L. lusitanicus, and also shows high color pattern variability. The high similarity among species L. lusitanicus, L. selvaticus and L. bilobatus sp. nov., the high color pattern variability of their populations, the overlapping geographical distribution of many studied populations, and the presence of three dorsal macrochaetae between trichobothria m2 and a5 of the second abdominal tergum, led me to define the group Lepidocyrtus lusitanicus species-complex. This group included the three abovementioned species with all of their color forms.

Intercontinental, trilobite-based correlation of the Moroccan early Middle Cambrian

1998 ◽  
Vol 35 (4) ◽  
pp. 374-401 ◽  
Author(s):  
Gerd Geyer
Keyword(s):  
New Species ◽  
Type Species ◽  
New Genera ◽  
Middle Cambrian ◽  
High Atlas ◽  
Cambrian Trilobite ◽  
Stratigraphic Ranges ◽  
Definition Of ◽  
Taxonomic Assignments ◽  
First Time

Refined correlations of Lower-Middle Cambrian boundary strata and Middle Cambrian strata between Cambrian paleocontinents require an improved understanding of local stratigraphic ranges of well-defined trilobite genera and species. The conventional definition of the base of the Middle Cambrian in Spain (base of Acadoparadoxides mureroensis Zone) has led to problems even when correlations into other West Gondwanan regions (i.e., Moroccan) are attempted because Paradoxides (Acadoparadoxides) mureroensis and protolenid species from immediately underlying strata have been regularly misidentified. The A. mureroensis Zone is shown to correlate into strata above the base of the Moroccan Middle Cambrian, and paradoxidid trilobites, a guide to the Middle Cambrian, have a lower occurrence in Morocco. These correlations are strengthened by a reevaluation of higher Middle Cambrian trilobite genera and species in Morocco and their use in correlation into Spain and Baltica. Two new genera and eight new species of Middle Cambrian trilobites from the Moroccan High Atlas and Anti-Atlas are proposed. They areCondylopyge eli n.sp., Schistocephalus?ornatus n.sp., Paradoxides (Acadoparadoxides) nobilis n.sp., Parasolenopleura lemdadensis n.sp., Bailiella inconspicua n.sp., Bailiella dilatata n.sp., Atopiaspis tikasraynensis n.gen. and n.sp., and Cambrophatictor cataractis n.gen. and n.sp. Gigoutella atlasensis Hupé 1953 is described in detail for the first time. Gonzaloia n.gen. (type species Calymene holometopa Angelin 1851) is based on a well-known species from the Middle Cambrian of Baltica. The occurrences of the majority of the new Moroccan taxa clearly corroborate earlier interregional and intercontinental correlations by the author and refine and modify proposals by K. Sdzuy, which were largely based on generalized taxonomic assignments of G. atlasensis and the new species S.? ornatus and P. (A.) nobilis.

scholarly journals A xandarellid artiopodan from Morocco – a middle Cambrian link between soft-bodied euarthropod communities in North Africa and South China

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Javier Ortega-Hernández ◽  
Abdelfattah Azizi ◽  
Thomas W. Hearing ◽  
Thomas H. P. Harvey ◽  
Gregory D. Edgecombe ◽  
...  
Keyword(s):  
New Species ◽  
North Africa ◽  
South China ◽  
Early Cambrian ◽  
Burgess Shale ◽  
Middle Cambrian ◽  
West Gondwana ◽  
Lower Palaeozoic ◽  
Chengjiang Biota ◽  
Stratigraphic Range

Abstract Xandarellida is a well-defined clade of Lower Palaeozoic non-biomineralized artiopodans that is exclusively known from the early Cambrian (Stage 3) Chengjiang biota of South China. Here we describe a new member of this group, Xandarella mauretanica sp. nov., from the middle Cambrian (Stage 5) Tatelt Formation of Morocco, making this the first non-trilobite Cambrian euarthropod known from North Africa. X. mauretanica sp. nov. represents the youngest occurrence of Xandarellida – extending its stratigraphic range by approximately 10 million years – and expands the palaeobiogeographic distribution of the group to the high southern palaeolatitudes of West Gondwana. The new species provides insights into the lightly sclerotized ventral anatomy of Xandarellida, and offers stratigraphically older evidence for a palaeobiogeographic connection between Burgess Shale-type euarthropod communities in North Africa and South China, relative to the (Tremadocian) Fezouata biota.

Two New Species of Aira (Poaceae) from the Iberian Peninsula and the Balearic Islands

2020 ◽  
Vol 45 (1) ◽  
pp. 75-84
Author(s):  
Llorenç Sáez ◽  
Javier López-Alvarado ◽  
Pere Fraga ◽  
Regina Berjano ◽  
M. Ángeles Ortiz ◽  
...  
Keyword(s):  
Risk Assessment ◽  
New Species ◽  
Iberian Peninsula ◽  
Diploid Species ◽  
Balearic Islands ◽  
Similar Species ◽  
Chromosome Counts ◽  
Two New Species

Abstract—Two new diploid species, Aira minoricensis and Aira hercynica, are described and illustrated, along with chromosome counts, risk assessment, distribution and habitat, phenology, and comparisons with morphologically similar species. A comparative table and a key for the species of Aira for the Iberian Peninsula and the Balearic Islands are provided to assist in the identification of these overlooked species, and their relationships to other taxa are discussed.

A new species of Puliciphora Dahl (Diptera: Phoridae) from Malaysia

2020 ◽  
Vol 156 (4) ◽  
pp. 276-278
Author(s):  
R. Henry ◽  
L. Disney
Keyword(s):  
New Species ◽  
Definition Of ◽  
A New Species

Puliciphora browni sp. n. is described from Malaysia. Recognition of this new species expands the definition of the genus Puliciphora.

Studies on the genus Aporcelaimellus Heyns, 1965 (Nematoda, Dorylaimida, Aporcelaimidae). Four new species with complex uterus from Southeastern Iberian Peninsula

Zootaxa ◽  
2012 ◽  
Vol 3551 (1) ◽  
pp. 1 ◽  
Author(s):  
SERGIO ÁLVAREZ-ORTEGA ◽  
JOAQUÍN ABOLAFIA ◽  
GRACIA LIÉBANAS ◽  
REYES PEÑA-SANTIAGO
Keyword(s):  
New Species ◽  
Iberian Peninsula ◽  
Natural Areas ◽  
Line Drawings ◽  
C 63

Four new species with complex uterus of the genus Aporcelaimellus, collected mainly in natural areas in the IberianPeninsula, are identified and described here. Aporcelaimellus alpujarrensis sp. n. is characterized by having body1.72–1.91 mm long, lip region offset by constriction and 14–15μm broad, odontostyle 14–16μm long with apertureoccupying 67–70% its length, neck about 455μm long, pharyngeal expansion about 224μm long, uterus tripartite and145–206μm long, V = 53–55, tail convex conoid (27–34μm, c = 55–71, c’ = 0.9–1.1), spicules 56–60μm long, and 7–9irregularly spaced ventromedian supplements with hiatus. Aporcelaimellus castaneanus sp. n. is characterized by havingbody 2.18–2.83 mm long, lip region offset by constriction and 20–23μm broad, odontostyle 22–24μm long with apertureoccupying 62–67% its length, neck 581–662μm long, pharyngeal expansion 300–355μm long, uterus tripartite and164–348μm long, V = 52–58, tail conical with rounded terminus (44–52μm, c = 48–60, c’ = 0.8–1.1), spicules 94–103μm long, and 14–15 irregularly spaced ventromedian supplements which lack hiatus. Aporcelaimellus communis sp. n. ischaracterized by having body 2.56–4.22 mm long, lip region offset by constriction and 19–25μm broad, odontostyle19–26μm long with aperture occupying 64–74% its length, neck 595–750μm long, pharyngeal expansion 321–427μmlong, uterus bipartite and 190–450μm long, V = 51–60, tail short and convex conoid (29–50μm, c = 63–109, c’ = 0.5–1.0),spicules 89–118μm long, and 16–25 irregularly spaced ventromedian supplements with hiatus. Aporcelaimellus tenuis sp.n. is characterized by having body 1.89–2.70 mm long and comparatively slender (a = 35–49), lip region offset byconstriction and 15–18μm broad, odontostyle 15–21μm long with aperture occupying 60–70% of its length, neck488–645μm long, pharyngeal expansion 251–366μm long, uterus bipartite and 135–213μm long, V = 55–58, tail convexconoid with rounded terminus (25–40μm, c = 64–92, c’ = 0.8–1.1), spicules 52–66μm long, and 11–12 irregularly spaced SEM pictures, are given for the four species.ventromedian supplements with hiatus. Measurements and illustrations, including line drawings, LM pictures and and/or

scholarly journals The Souss lagerstätte of the Anti-Atlas, Morocco: discovery of the first Cambrian fossil lagerstätte from Africa

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Gerd Geyer ◽  
Ed Landing
Keyword(s):  
South China ◽  
Lower Cambrian ◽  
Northern Slope ◽  
Sea Floor ◽  
Upper Cambrian ◽  
Exceptional Preservation ◽  
West Gondwana ◽  
Regional Correlation ◽  
Animal Remains ◽  
Stratigraphic Interval

AbstractEpisodic low oxygenated conditions on the sea-floor are likely responsible for exceptional preservation of animal remains in the upper Amouslek Formation (lower Cambrian, Stage 3) on the northern slope of the western Anti-Atlas, Morocco. This stratigraphic interval has yielded trilobite, brachiopod, and hyolith fossils with preserved soft parts, including some of the oldest known trilobite guts. The “Souss fossil lagerstätte” (newly proposed designation) represents the first Cambrian fossil lagerstätte in Cambrian strata known from Africa and is one of the oldest trilobite-bearing fossil lagerstätten on Earth. Inter-regional correlation of the Souss fossil lagerstätte in West Gondwana suggests its development during an interval of high eustatic levels recorded by dark shales that occur in informal upper Cambrian Series 2 in Siberia, South China, and East Gondwana.

scholarly journals Metahadzia Uncispina, A New Amphipod from Phreatic Ground-Waters of the Guadalquivir River basin of Southern Spain

1988 ◽  
Vol 58 (1) ◽  
pp. 79-87
Author(s):  
Jos Notenboom
Keyword(s):  
New Species ◽  
Iberian Peninsula ◽  
River Basin ◽  
Southern Spain ◽  
The South ◽  
Apical Spine ◽  
Ground Waters ◽  
Guadalquivir River ◽  
Original Concept

Metahadzia uncispina n. sp. is described, being the second species of the genus on the Iberian Peninsula. The new species, well characterized by the transformation of the apical spine on the endopodite of the male uropod 2, is undoubtedly closely related with M. tavaresi (Mateus & Mateus, 1972) from the south of Portugal. Comments are made about recent emendations of the original concept of the genus Metahadzia Stock, 1977.

Waynea giraltiae, a new lichen species from the Iberian Peninsula

2009 ◽  
Vol 42 (1) ◽  
pp. 29-33 ◽  
Author(s):  
Pieter P.G. van den BOOM
Keyword(s):  
New Species ◽  
Iberian Peninsula ◽  
Lichen Species ◽  
Southern Portugal

AbstractA new lichen species, Waynea giraltiae van den Boom, is described from southern Portugal and Spain. It is characterized by a very fine tomentum on the squamulose thallus, fusiform, 3-septate ascospores, and strongly curved filiform conidia. It is the first species of the genus containing argopsin. The new species is compared with related Waynea species. Waynea cretica is recorded as new to the Iberian Peninsula.

scholarly journals A modified definition of the genusHaplochernes(Pseudoscorpiones: Chernetidae), with a new species from Hainan Island

2017 ◽  
Vol 45 (1) ◽  
pp. 112-122 ◽  
Author(s):  
Zhizhong Gao ◽  
Feng Zhang ◽  
Mark S. Harvey
Keyword(s):  
New Species ◽  
Hainan Island ◽  
Definition Of ◽  
A New Species
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