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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

Adults of subgenera Antiperyphus and Notholopha. ABembidion (Antiperyphus) philippii, Argentina: Neuquén: Rio Collón Curá ca 13 km S La Rinconada, DRM voucher V100787 BBembidion (Notholopha) scitulum, CHILE: Reg. VII: Los Niches E of Curicó, DRM voucher V100790 CBembidion (Notholopha) sexfoveolatum, CHILE: Reg. IX: 16.3 km E Malalcahuello, Cuesta Las Raices, DRM voucher V100598. Scale bar 1 mm.
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Figure 2: Adults of subgenera Antiperyphus and Notholopha. ABembidion (Antiperyphus) philippii, Argentina: Neuquén: Rio Collón Curá ca 13 km S La Rinconada, DRM voucher V100787 BBembidion (Notholopha) scitulum, CHILE: Reg. VII: Los Niches E of Curicó, DRM voucher V100790 CBembidion (Notholopha) sexfoveolatum, CHILE: Reg. IX: 16.3 km E Malalcahuello, Cuesta Las Raices, DRM voucher V100598. Scale bar 1 mm.

Mentions: As noted by Toledano (2008), Jeannel’s concept of Antiperyphus was polyphyletic, with at least Bembidion hirtipes, Bembidion ringueleti, Bembidion rufoplagiatum, and Bembidion uniforme Csiki belonging within Antiperyphanes. This is confirmed in part by my results (Fig. 8, Table 3). In addition, Bembidion engelhardti, Bembidion eburneonigrum, Bembidion tucumanum, and Bembidion germainianum are members of Nothonepha, not Antiperyphus. Of the species included in the subgenus by Jeannel (1962), this leaves only the type species, Bembidium philippii (Fig. 2A).


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

Maddison DR - Zookeys (2014)

Adults of subgenera Antiperyphus and Notholopha. ABembidion (Antiperyphus) philippii, Argentina: Neuquén: Rio Collón Curá ca 13 km S La Rinconada, DRM voucher V100787 BBembidion (Notholopha) scitulum, CHILE: Reg. VII: Los Niches E of Curicó, DRM voucher V100790 CBembidion (Notholopha) sexfoveolatum, CHILE: Reg. IX: 16.3 km E Malalcahuello, Cuesta Las Raices, DRM voucher V100598. Scale bar 1 mm.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

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

Figure 2: Adults of subgenera Antiperyphus and Notholopha. ABembidion (Antiperyphus) philippii, Argentina: Neuquén: Rio Collón Curá ca 13 km S La Rinconada, DRM voucher V100787 BBembidion (Notholopha) scitulum, CHILE: Reg. VII: Los Niches E of Curicó, DRM voucher V100790 CBembidion (Notholopha) sexfoveolatum, CHILE: Reg. IX: 16.3 km E Malalcahuello, Cuesta Las Raices, DRM voucher V100598. Scale bar 1 mm.
Mentions: As noted by Toledano (2008), Jeannel’s concept of Antiperyphus was polyphyletic, with at least Bembidion hirtipes, Bembidion ringueleti, Bembidion rufoplagiatum, and Bembidion uniforme Csiki belonging within Antiperyphanes. This is confirmed in part by my results (Fig. 8, Table 3). In addition, Bembidion engelhardti, Bembidion eburneonigrum, Bembidion tucumanum, and Bembidion germainianum are members of Nothonepha, not Antiperyphus. Of the species included in the subgenus by Jeannel (1962), this leaves only the type species, Bembidium philippii (Fig. 2A).

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