A non-archaeopterygid avialan theropod from the Late Jurassic of southern Germany

  1. Oliver WM Rauhut  Is a corresponding author
  2. Helmut Tischlinger
  3. Christian Foth
  1. Bayerische Staatssammlung für Paläontologie und Geologie, Germany
  2. Ludwig-Maximilians-Universität, Germany
  3. Tannenweg 16, Germany
  4. Université de Fribourg, Switzerland
18 figures, 2 tables and 3 additional files


Geographic and stratigraphic provenance of the new avialan specimen.

(A) Map of the southern Franconian Alb with the palaeogeographic settings indicated and showing the localities of theropod specimens from the Solnhofen Archipelago (modified from Foth and Rauhut, 2017). (B) Stratigraphic position of the new specimen, SNSB-BSPG 2017 I 133, within the ‘Solnhofen limestones’ and in comparison to known specimens of Archaeopteryx (modified from Rauhut et al., 2012).

Overview photograph of holotype specimen of Alcmonavis poeschli gen.

et sp. nov., SNSB-BSPG 2017 I 133. Abbreviations: hu, humerus; mc, metacarpus; r, radius; sl, semilunate carpal; ul, ulna; Roman numerals indicate digits and Arabic numerals indicate phalanges of digits. Scale bar is 5 cm.

Right humerus of Alcmonavis poeschli in (A) normal and (B) ultraviolet light.

Abbreviations: dpc, deltopectoral crest; fmb, fossa musculus brachialis; it, internal tuberosity; mp, attachment facet for m. pectoralis; rc, radial condyle. Scale bar is 3 cm.

Antebrachium and manus of Alcmonavis poeschli.

Abbreviations as in Figure 1, and: pi, pisiforme; ra, radiale. Scale bar is 5 cm.

Proximal end of ulna of Alcmonavis poeschli in (A) normal and (B) ultraviolet light.

Abbreviations: ha, humeral articulation; ib, impressio brachialis; ri, ridge bordering the impressio brachialis; rt, radial tubercle (cotylus dorsalis). Scale bar is 5 mm.

Distal end of ulna and proximal carpals of Alcmonavis poeschli in (A) normal and (B) ultraviolet light.

Abbreviations as in Figures 2 and 4 and: amr, anteromedial ridge. Scale bar is 5 mm.

Radius of Alcmonavis poeschli.

(A) Proximal end as exposed in medial view. (B) Proximal end in oblique posteromedial view. (C) mid-shaft in medial view. Abbreviations: fu, longitudinal furrow; tbr, tuberculum bicipitale radii. Scale bars are 5 mm.

Manus of Alcmonavis poeschli in (A) normal and (B) ultraviolet light.

Abbreviations as in Figures 2 and 4, and: dc, distal carpal. Scale bar is 10 mm.

Distal carpals and bases of metacarpals of Alcmonavis poeschli in (A) normal and (B) ultraviolet light.

Abbreviations as in Figures 2, 4 and 8, and: patr, palmar trochlear ridge; pltr, plantar trochlear ridge. Scale bar is 5 mm.

Manual phalanges of Alcmonavis poeschli.

(A) and (B) Distal ends of metacarpals II and III and proximal phalanges of digits II and III in normal (A) and ultraviolet (B) light. (C) First phalanx of first digit in medial view. (D) Ungual phalanx of digit I in medial view under ultraviolet light. (E) Ungual phalanx of digit II in medial view under ultraviolet light. (F) Ungual phalanx of digit III in lateral view under ultraviolet light. Abbreviations as in Figure 2, and: ft, flexor tubercle; gr, groove; ks, keratinous sheath; lpf, lateropalmar flange; pl, proximal lip. Scale bars are 1 cm.

Comparison of humeral shape in some Mesozoic birds.

(A, E) Alcmonavis. (B–D) Archaeopteryx with humeral shape of Alcmonavis shown in grey. (B) Berlin specimen. (C) Solnhofen specimen. (D) Daiting specimen. (F) Jeholornis. (G) Sapeornis. (H) Confuciusornis. (B, C) modified after Wellnhofer, 2008. (F–H) modified after Wang et al., 2016.

Mani of several paravian theropods for comparison with Alcmonavis.

(A) Right manus of Velociraptor mongoliensis (IGM 100/982) in plantar view. (B) Left manus of Microraptor gui (IVPP V 13352) in plantar view. (C) Right manus of the Thermopolis specimen of Archaeopteryx in planto-medial view. (D) Left manus of Confuciusornis sanctus (JME 2005/1) in palmar view. (E) Right manus of Alcmonavis poeschli in palmar view. Abbreviations as in Figure 2. Scale bars are 20 mm (A) and 10 mm (B–E).

Proximal part of the humerus of specimens of Archaeopteryx in anteromedial view, showing the lack of a pronounced facet for the pectoralis muscle in this taxon.

(A) London specimen. (B) Thermopolis specimen.

Shoulder region and proximal ends of both humeri of Sapeornis (JZT-DB 0047), showing the enlarged and medially inclined facet for the insertion of m.

pectoralis (arrows).

Figure 15 with 3 supplements
Phylogenetic position of Alcmonavis poeschli.

Time-calibrated, simplified reduced consensus tree resulting from an analysis of 136 taxa scored for 565 characters under equally-weighted parsimony (see text and supplementary material for details). Nodes with circuit numbers: 1, Maniraptora; 2, Pennaraptora; 3, Paraves; 4, Deinonychosauria; 5, Avialae; 6, Anchiornithidae; 7, Pygostylia; 8, Ornithothoraces. Bremer supports are shown for the clade Avialae.

Figure 15—figure supplement 1
Full strict consensus tree of the unweighted analysis with Bremer support and Bootstrap values for clades with a support of 50% or more indicated.
Figure 15—figure supplement 2
Full reduced consensus tree of the unweighted analysis.

Named nodes: 1, Coelurosauria; 2, Tyrannosauroidea; 3, Compsognathidae; 4, Maniraptoriformes; 5, Ornithomimosauria; 6, Maniraptora; 7, Alvarezsauridae; 8, Pennaraptora; 9, Therizinosauroidea; 10, Oviraptorosauria; 11, Oviraptoridae; 12, Paraves; 13, Deinonychosauria; 14, Troodontidae; 15, Dromaeosauridae; 16, Unenlagiinae; 17, Microraptorinae; 18, Velociraptorinae; 19, Dromaeosaurinae; 20, Avialae; 21; Anchiornithidae; 22, Pygostylia; 23, Ornithothoraces; 24, Enantiornithes; 25, Ornithuromorpha; 26, Ornithurae; 27, Neornithes.

Figure 15—figure supplement 3
Strict consensus tree of the analysis using implied weights with Bremer support and Bootstrap values for clades with a support of 50% or more indicated.
Development of the deltopectoral crest and the facet for the pectoralis muscle in several theropods.

(A) Right humerus of the basal maniraptoriform Ornitholestes hermani (AMNH 619). (B) Left humerus (reversed for comparison) of the dromaeosaurid Unenlagia comahuensis (MCF PVPH 78). (C) Right humerus of Alcmonavis poeschli (under ultraviolet light; SNSB-BSPG 2017 I 133). (D) Right humerus of Bucorvus abyssinicus (northern ground hornbill; SNSB-BSPG unnumbered).

Development of the tuberculum bicipitale radii in basal avialan theropods.

(A) Right elbow joint of Archaeopteryx (Munich specimen). (B) Right elbow joint of the Ottmann and Steil specimen (probably Archaeopteryx). (C) Left elbow joint of Confuciusornis sanctus (SNSB-BSPG 1999 I 15). Abbreviations: hu, humerus; r, radius; tbr, tuberculum bicipitale radii; ul, ulna.

Proximal end of theropod ulnae, demonstrating character states for character 563.

(A) Left ulna of Coelurus fragilis (YPM 2010). (B) Left ulna of Confuciusornis sanctus (JME 1997/1) Scale bar is 10 mm in (A) and in mm in (B).



Table 1
Measurements of the right forelimb of Alcmonavis poeschli.

All measurements in millimetres. Length of unguals is given as maximal length measured in a straight line from proximal articulation to tip.

Humerus90 (estimated)Phalanx II-122.8
Ulna82Phalanx II-228
Metacarpal I7.1 (estimated)Ungual II17.5
Metacarpal II40.9Phalanx III-18.8
Metacarpal III36.8Phalanx III-25.9
Phalanx I-128.5Phalanx III-317.9
Ungual I16Ungual III11
Table 2
Comparison of skeletal proportions of specimens of Archaeopteryx and the new Mühlheim specimen (bold).
SpecimenPI-1/UlnaPiii-1/PI-1Pii-1/PI-1Pii-2/PI-1Digit I/Digit IIUI/UlnaUii/PII-1PIII-2/UlnaPiii-2/PIII-1
 Ottmann and Steil0.3630.2800.7330.933NANANA0.0810.794
T value*6.323−3.996−4.684−4.598NANANA1.7831.330
p value*0.0000.0050.0020.002NANANA0.1180.225
T value8.038−3.642−3.988−4.3735.0684.1704.7224.1463.324
p value0.0000.0110.0070.0050.0070.0140.0090.0060.016

Additional files

Supplementary file 1

List of characters used in phylogenetic analysis and phylogenetic data matrix.

Supplementary file 2

Data matrix.

Transparent reporting form

Download links

A two-part list of links to download the article, or parts of the article, in various formats.

Downloads (link to download the article as PDF)

Open citations (links to open the citations from this article in various online reference manager services)

Cite this article (links to download the citations from this article in formats compatible with various reference manager tools)

  1. Oliver WM Rauhut
  2. Helmut Tischlinger
  3. Christian Foth
A non-archaeopterygid avialan theropod from the Late Jurassic of southern Germany
eLife 8:e43789.