Limits...
An unexpected clade of South American ground beetles (Coleoptera, Carabidae, Bembidion).

Maddison DR - Zookeys (2014)

Bottom Line: Redefined subgenera within the complex are each well-supported as monophyletic.Most striking was the discovery that a small set of morphologically and ecologically heterogeneous species formed a clade, here called subgenus Nothonepha.A revised classification is proposed for the Antiperyphanes Complex.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Integrative Biology, Oregon State University, Corvallis, OR 97331, USA.

ABSTRACT
Phylogenetic relationships of the Antiperyphanes Complex of the genus Bembidion are inferred using DNA sequences from seven genes (two nuclear ribosomal, four nuclear protein coding, and one mitochondrial protein coding). Redefined subgenera within the complex are each well-supported as monophyletic. Most striking was the discovery that a small set of morphologically and ecologically heterogeneous species formed a clade, here called subgenus Nothonepha. This unexpected result was corroborated by the discovery of deep pits in the lateral body wall (in the mesepisternum) of all Nothonepha, a trait unique within Bembidion. These pits are filled with a waxy substance in ethanol-preserved specimens. In one newly discovered species (Bembidion tetrapholeon sp. n., described here), these pits are so deep that their projections into the body cavity from the two sides touch each other internally. These structures in Bembidion (Nothonepha) are compared to very similar mesepisternal pits which have convergently evolved in two other groups of carabid beetles. The function of these thoracic pits is unknown. Most members of subgenus Nothonepha have in addition similar but smaller pits in the abdomen. A revised classification is proposed for the Antiperyphanes Complex.

No MeSH data available.


Related in: MedlinePlus

Inner surface of the anterior portion of the abdomen, soft tissue removed. The abdomen is slightly tilted to the left. sp: sclerotized patch on membrane that bounds the front of the abdomen on the ventral side. All species shown are members of the Bembidion Series; A–F are members of the Antiperyphanes Complex; A, C and D are members of the subgenus NothonephaABembidion tetrapholeon, DRM voucher V100766 BBembidium mandibulare, DRM voucher V100805 CBembidion sp. nr. lonae, DRM voucher V100803 DBembidion lonae, DRM voucher V100802 EBembidium philippii, DRM voucher V100804 FBembidion chimborazonum, DRM voucher V100809 GBembidion charile Bates, DRM voucher DNA1171 HBembidion quadrimaculatum oppositum Say, DRM voucher V100807. Scale bar 0.1 mm.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4109512&req=5

Figure 14: Inner surface of the anterior portion of the abdomen, soft tissue removed. The abdomen is slightly tilted to the left. sp: sclerotized patch on membrane that bounds the front of the abdomen on the ventral side. All species shown are members of the Bembidion Series; A–F are members of the Antiperyphanes Complex; A, C and D are members of the subgenus NothonephaABembidion tetrapholeon, DRM voucher V100766 BBembidium mandibulare, DRM voucher V100805 CBembidion sp. nr. lonae, DRM voucher V100803 DBembidion lonae, DRM voucher V100802 EBembidium philippii, DRM voucher V100804 FBembidion chimborazonum, DRM voucher V100809 GBembidion charile Bates, DRM voucher DNA1171 HBembidion quadrimaculatum oppositum Say, DRM voucher V100807. Scale bar 0.1 mm.

Mentions: Internally these abdominal pits are evident as knob-shaped intrusions (Fig. 14A, C). Consistent with the lack of externally visible pits, Bembidion lonae lacks these intrusions, and has instead only a ridge between the abdominal segments (Fig. 14D), as is typical in Bembidion.


An unexpected clade of South American ground beetles (Coleoptera, Carabidae, Bembidion).

Maddison DR - Zookeys (2014)

Inner surface of the anterior portion of the abdomen, soft tissue removed. The abdomen is slightly tilted to the left. sp: sclerotized patch on membrane that bounds the front of the abdomen on the ventral side. All species shown are members of the Bembidion Series; A–F are members of the Antiperyphanes Complex; A, C and D are members of the subgenus NothonephaABembidion tetrapholeon, DRM voucher V100766 BBembidium mandibulare, DRM voucher V100805 CBembidion sp. nr. lonae, DRM voucher V100803 DBembidion lonae, DRM voucher V100802 EBembidium philippii, DRM voucher V100804 FBembidion chimborazonum, DRM voucher V100809 GBembidion charile Bates, DRM voucher DNA1171 HBembidion quadrimaculatum oppositum Say, DRM voucher V100807. Scale bar 0.1 mm.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4109512&req=5

Figure 14: Inner surface of the anterior portion of the abdomen, soft tissue removed. The abdomen is slightly tilted to the left. sp: sclerotized patch on membrane that bounds the front of the abdomen on the ventral side. All species shown are members of the Bembidion Series; A–F are members of the Antiperyphanes Complex; A, C and D are members of the subgenus NothonephaABembidion tetrapholeon, DRM voucher V100766 BBembidium mandibulare, DRM voucher V100805 CBembidion sp. nr. lonae, DRM voucher V100803 DBembidion lonae, DRM voucher V100802 EBembidium philippii, DRM voucher V100804 FBembidion chimborazonum, DRM voucher V100809 GBembidion charile Bates, DRM voucher DNA1171 HBembidion quadrimaculatum oppositum Say, DRM voucher V100807. Scale bar 0.1 mm.
Mentions: Internally these abdominal pits are evident as knob-shaped intrusions (Fig. 14A, C). Consistent with the lack of externally visible pits, Bembidion lonae lacks these intrusions, and has instead only a ridge between the abdominal segments (Fig. 14D), as is typical in Bembidion.

Bottom Line: Redefined subgenera within the complex are each well-supported as monophyletic.Most striking was the discovery that a small set of morphologically and ecologically heterogeneous species formed a clade, here called subgenus Nothonepha.A revised classification is proposed for the Antiperyphanes Complex.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Integrative Biology, Oregon State University, Corvallis, OR 97331, USA.

ABSTRACT
Phylogenetic relationships of the Antiperyphanes Complex of the genus Bembidion are inferred using DNA sequences from seven genes (two nuclear ribosomal, four nuclear protein coding, and one mitochondrial protein coding). Redefined subgenera within the complex are each well-supported as monophyletic. Most striking was the discovery that a small set of morphologically and ecologically heterogeneous species formed a clade, here called subgenus Nothonepha. This unexpected result was corroborated by the discovery of deep pits in the lateral body wall (in the mesepisternum) of all Nothonepha, a trait unique within Bembidion. These pits are filled with a waxy substance in ethanol-preserved specimens. In one newly discovered species (Bembidion tetrapholeon sp. n., described here), these pits are so deep that their projections into the body cavity from the two sides touch each other internally. These structures in Bembidion (Nothonepha) are compared to very similar mesepisternal pits which have convergently evolved in two other groups of carabid beetles. The function of these thoracic pits is unknown. Most members of subgenus Nothonepha have in addition similar but smaller pits in the abdomen. A revised classification is proposed for the Antiperyphanes Complex.

No MeSH data available.


Related in: MedlinePlus