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          Institute: MPI für Entwicklungsbiologie     Collection: Abteilung 4 - Evolutionary Biology (R. Sommer)     Display Documents

ID: 681809.0, MPI für Entwicklungsbiologie / Abteilung 4 - Evolutionary Biology (R. Sommer)
Sudhausia aristotokia n. gen., n. sp and S-crassa n. gen., n. sp (Nematoda: Diplogastridae): viviparous new species with precocious gonad development
Authors:Herrmann, M.; Ragsdale, E. J.; Kanzaki, N.; Sommer, R. J.
Date of Publication (YYYY-MM-DD):2013-11
Title of Journal:Nematology
Journal Abbrev.:Nematology
Start Page:1001
End Page:1020
Sequence Number of Article:DOI:10.1163/15685411-00002738
Review Status:Internal review
Audience:Not Specified
Abstract / Description:Two new species of diplogastrid nematodes, Sudhausia aristotokia n. gen., n. sp. and S. crassa n. gen., n. sp., were isolated from dung beetles (Coleoptera: Scarabaeidae) in Ghana and South Africa, respectively. Sudhausia n. gen. is circumscribed by stomatal morphology, namely the presence of a tube-shaped gymnostom, a pair of conical subventral denticles in the metastegostom, and a disk-like telostegostom bearing minute conical denticles. Other characters distinguishing the new genus are the presence of a bursa in the male and a vulva lined anteriorly and posteriorly by columns of sac-like cells. The two new species, both of which are hermaphroditic, are distinguished from each other by spicule and gubernaculum morphology, male papillae arrangement, bursal shape, vaginal morphology, and phasmid position. A suite of unusual developmental traits that distinguishes Sudhausia n. spp. includes maturation of the gonad and development of juvenile progeny before moulting to adulthood, a two-fold increase in embryo size during development, and constitutive vivipary. A phylogeny inferred from 11 ribosomal protein-coding genes and a fragment of the small subunit rRNA gene show Sudhausia n. gen. to be divergent from other sequenced diplogastrid taxa, including those characterised by a tube-like stoma. The two new species represent useful new reference points for the study of feeding-structure evolution in Diplogastridae.
Free Keywords:androdioecy; description; dung beetles; ghana; hermaphrodite; molecular; morphology; morphometrics; new genus; new species; onthophagus; phylogeny; scarabaeidae; scarabaeus; south africa; stoma; taxonomy; maximum-likelihood; pristionchus; evolution; phylogeny; parasite
External Publication Status:published
Document Type:Article
Communicated by:MPI für Entwickungsbiologie
Affiliations:MPI für Entwicklungsbiologie/Abteilung 4 - Evolutionsbiologie (Ralf J. Sommer)
External Affiliations:Max Planck Inst Dev Biol, Dept Evolutionary Biol, Spemannstr 37, Tubingen, Germany Max Planck Inst Dev Biol, Dept Evolutionary Biol, Spemannstr 37, Tubingen, Germany Max Planck Inst Dev Biol, Dept Evolutionary Biol, Tubingen, Germany Forestry & Forest Prod Res Inst, Forest Pathol Lab, Tsukuba, Ibaraki 3058687, Japan %G English
Identifiers:ISSN:1388-5545 %R Doi 10.1163/15685411-00002738 [ID No:1]
ISI:000328133600010 [ID No:2]
ISI:000328133600010 [ID No:3]
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