Project 1066: M. Koch, G. D. Edgecombe. 2012. The preoral chamber in geophilomorph centipedes: comparative morphology, phylogeny, and the evolution of centipede feeding structures. Zoological Journal of the Linnean Society. 165 (1):1-62.
Specimen: Tygarrup diversidens (NHM:310)
View: dorsal view of mandible

Abstract

Geophilomorpha differ from other Chilopoda with respect to feeding mechanisms, having an inferred prevalence of food intake by pharyngeal sucking, and all components of the preoral chamber, mandibles, and head endoskeleton are so modified that inferring homologies with other chilopods is a challenge. Light and scanning electron microscopic documentation of the epipharynx, hypopharynx, mandibles, tentorium, and pharynx in 26 species sampling ten families of Geophilomorpha adds 24 phylogenetically informative new characters to a published morphological dataset for phylogenetic analysis. The mandibular gnathal edge of Geophilomorpha is recognized as being composed of pectinate lamellae only, i.e. lacking a molar plate and true teeth; the sclerotized lamellae traditionally identified as dentate are a modified pectinate lamella. An inferred transformation of the gnathal edge within Adesmata involves a reduction in the number of pectinate lamellae and their re-arrangement from imbricate to continuously aligned along the edge. Geophilid mandibles maintain a single pectinate lamella, to which the armature of the former ventral margin of the gnathal lobe is added distally to envelop the hypopharynx. This distal prolongation of the gnathal edge and transformation of the hypopharnyx into a tapering cone contribute new support for the monophyly of Geophilidae under implied character weighting. The interpretation that geophilomorphs have an immobile tentorium is consistent with the anatomy of Adesmata, but tentorial muscles in Placodesmata suggest mobility. Sensilla arrangements on the epi- and hypopharynx provide new characters for a grouping of Oryidae, Himantariidae, Schendylidae, and Ballophilidae, although cladistic analysis with other morphological characters also places Gonibregmatidae within this clade.


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Project DOI: 10.7934/P1066, http://dx.doi.org/10.7934/P1066
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 32 Taxa
  • 1 Specimen
  • 92 Characters
Total size of project's media files: 6 MB

Download Project SDD File
Total scored cells: 2796
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 92
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 196
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:92/0
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MorphoBank Project 1066


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    MorphoBank Curator
    Project Administrator
    Last logged in 11/05/13
    321192002796
    (2691, 0, 105)
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    Maureen Admin
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    Greg Edgecombe
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    Taxonomic Overview for Matrix 'M2342' (32 Taxa)

    taxon unscored
    cells
    scored
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    "-" cellscell images labels on
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    [1] Lithobius forficatus
    Last Modified in 12/05/13
    2838307003
    [2] Henicops washpoolensis
    Last Modified in 12/05/13
    2838307003
    [3] Craterostigmus tasmanianus
    Last Modified in 12/05/13
    9767607003
    [4] Cryptops hortensis
    Last Modified in 12/05/13
    2828208003
    [5] Scolopocryptops ferrugineus
    Last Modified in 12/05/13
    2818109003
    [6] Scolopendra cingulata
    Last Modified in 12/05/13
    2818109003
    [7] Aphilodon weberi
    Last Modified in 12/05/13
    8767608003
    [8] Arrup kyushuensis
    Last Modified in 12/05/13
    6828204003
    [9] Ballophilus rouxi
    Last Modified in 12/05/13
    7848401003
    [10] Bothriogaster signata
    Last Modified in 12/05/13
    6868600003
    [11] Clinopodes flavidus
    Last Modified in 12/05/13
    6858501003
    [12] Dicellophilus carniolensis
    Last Modified in 12/05/13
    4858503003
    [13] Dignathodon microcephalus
    Last Modified in 12/05/13
    3858504003
    [14] Eucratonyx meinerti
    Last Modified in 12/05/13
    7848401003
    [15] Geophilus carpophagus
    Last Modified in 12/05/13
    1898902003
    [16] Gonibregmatus anguinus
    Last Modified in 12/05/13
    6848402003
    [17] Haplophilus subterraneus
    Last Modified in 12/05/13
    3898900003
    [18] Henia vesuviana
    Last Modified in 12/05/13
    1898902003
    [19] Himantarium gabrielis
    Last Modified in 12/05/13
    3898900003
    [20] Hydroschendyla submarina
    Last Modified in 12/05/13
    4878701003
    [21] Mecistocephalus tahitiensis
    Last Modified in 12/05/13
    6828204003
    [22] Notiphilides maximiliani
    Last Modified in 12/05/13
    4858503003
    [23] Orphnaeus brevilabiatus
    Last Modified in 12/05/13
    4858503003
    [24] Orya almohadensis
    Last Modified in 12/05/13
    3868603003
    [25] Pachymerium ferrugineum
    Last Modified in 12/05/13
    2888802003
    [26] Pectiniunguis argentinensis
    Last Modified in 12/05/13
    8838301003
    [27] Plesioschendyla confossa
    Last Modified in 12/05/13
    11808001003
    [28] Ribautia repanda
    Last Modified in 12/05/13
    6848402003
    [29] Steneurytion antipodum
    Last Modified in 12/05/13
    5858502003
    [30] Strigamia maritima
    Last Modified in 12/05/13
    4868602003
    [31] Tygarrup diversidens
    Last Modified in 12/05/13
    8808004003
    [32] Zelanophilus provocator
    Last Modified in 12/05/13
    3878702003


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views25638
    Project overview3027
    Matrix views2026Matrix landing page (1809 views); Koch and Edgecombe 2012 matrix (217 views);
    Media views4548Media search (3916 views); M309513 (632 views);
    Taxon list10376
    Views for media list1169
    Specimen list2040
    Bibliography844
    Documents list1608




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project213
    Project downloads206
    Matrix downloads7Koch and Edgecombe 2012 matrix (7 downloads);