Notes on<i>Orchymontia</i>Broun (Coleoptera: Hydraenidae)

Jäch, Manfred A.; Diaz, J. A.

doi:10.1080/00779962.2001.9722078

Cited by 1 publication

(5 citation statements)

References 1 publication

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“…This implies that the restriction of Ochtheosus to southern South America and of Parhydraena to southern Africa, respectively, are ancestral features. The preference of orchymontiine and most prosthetopine species for fast‐flowing streams (Ordish 1984; Perkins and Balfour‐Browne 1994; Jäch and Díaz 2001) suggests that life running water is a groundplan feature of Hydraenidae, and that terrestrial (e.g. Discozantaena , Meropathus , Nucleoptops , Ochtheosus ) or hygropetric (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…An enlarged clypeus is characteristic for adults of Hydrophiloidea (Beutel 1994), many adults of Hydraenidae, and adults of some other groups of Staphyliniformia such as Scaphidiidae (Hansen 1997). Yet, a relatively short clypeus is present in adults of Orchymontiinae (Hansen 1991a; Jäch and Díaz 2001: Fig. 1), Prosthetops , Parasthetops , Mesoceration , and Ochthebiinae (Fig.…”

Section: Head Morphologymentioning

confidence: 99%

“…A large labrum with a deep and narrow anteromedian incision is characteristic for adults of Prosthetops , Mesoceration , Parasthetops , Orchymontiinae (Fig. 10C; Jäch and Díaz 2001: Fig. 1), several species of Ochthebius (incl.…”

Section: Head Morphologymentioning

confidence: 99%

“…The head capsule appears elongate in adults of Hydraena and Orchymontiinae (Fig. 10a; Jäch and Díaz 2001: Fig. 1).…”

Section: List Of Complementary Characters (Not Included In the Analysis)mentioning

confidence: 99%

“…2000: Fig. 18), Orchymontiinae (Hansen 1991a; Jäch and Díaz 2001: Fig. 1), Adelphydraena , and most adults of Hydraena (Jäch et al.…”

Section: List Of Complementary Characters (Not Included In the Analysis)mentioning

confidence: 99%

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On the evolution of adult head structures and the phylogeny of Hydraenidae (Coleoptera, Staphyliniformia)

Beutel

Anton

Jäch

2003

J Zoological System

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External and internal head structures of adults of Orchymontiinae, Prosthetopinae, Hydraeninae and Ochthebiinae were studied and those of Ochthebius semisericeus and Limnebius truncatellus are described in detail. The results are evaluated with respect to their relevance for a reconstruction of hydraenid phylogeny and also compared with structural features found in adults of other staphyliniform families. The monophyly of Hydraenidae is supported by the presence of a plate-like, trilobed premento-hypopharyngeal extension, an unusual origin of m. tentoriohypopharyngalis, dorsal tentorial arms firmly fused with the head capsule, modified basal antennomeres, and palpigers connected by a transverse sclerotized bar. Orchymontiinae are monophyletic and the basal sister group of the remaining Hydraenidae. The presence of a ventral transverse genal bulge and of a pubescent antennal club with more than two antennomeres (reversal in some prosthetopines: e.g. Mesoceration abstrictum) are possible apomorphies of Hydraenidae excluding Orchymontiinae. Prosthetopinae are probably monophyletic and the sister group of Ochthebiinae + Hydraeninae. The latter clade is characterized by a distinct cupula formed by antennomere VI, a loose five-segmented pubescent antennal club, and a modified antennal musculature. The presence of an unusual tentorio-pharyngeal dilator is a shared derived feature of Ochthebiinae and the genus Davidraena. The monophyly of Ochthebiinae was confirmed and Ochtheosus is the sister group of the remaining ochthebiine genera, which are characterized by a perforated wall-like structure formed by the posterior tentorial arms. The absence of this tentorial modification and the fimbriate galea are plesiomorphies retained in Ochtheosus. Calobius differs strongly from other subgenera of Ochthebius and a generic status may be appropriate. The monophyly of Hydraeninae is not supported. Hydraena was confirmed as a clade and Laeliaena and Limnebius are sister groups. The latter genus is characterized by several autapomorphies. The basal position of Orchymontiinae and Prosthetopinae suggests a Gondwanan origin of Hydraenidae and a primary preference for life in running water. Important evolutionary changes of head structures are complex transformations of the antennae and related structures. Yet, the use of the antennae as accessory breathing organs is not a groundplan feature of the family. The results of this study strengthen the case of staphylinoid affinities of Hydraenidae.

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Section: Discussionmentioning

confidence: 99%

Section: Head Morphologymentioning

confidence: 99%

Section: Head Morphologymentioning

confidence: 99%

“…The head capsule appears elongate in adults of Hydraena and Orchymontiinae (Fig. 10a; Jäch and Díaz 2001: Fig. 1).…”

Section: List Of Complementary Characters (Not Included In the Analysis)mentioning

confidence: 99%

“…2000: Fig. 18), Orchymontiinae (Hansen 1991a; Jäch and Díaz 2001: Fig. 1), Adelphydraena , and most adults of Hydraena (Jäch et al.…”

Section: List Of Complementary Characters (Not Included In the Analysis)mentioning

confidence: 99%

See 3 more Smart Citations

On the evolution of adult head structures and the phylogeny of Hydraenidae (Coleoptera, Staphyliniformia)

Beutel

Anton

Jäch

2003

J Zoological System

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show abstract

Notes onOrchymontiaBroun (Coleoptera: Hydraenidae)

Cited by 1 publication

References 1 publication

On the evolution of adult head structures and the phylogeny of Hydraenidae (Coleoptera, Staphyliniformia)

On the evolution of adult head structures and the phylogeny of Hydraenidae (Coleoptera, Staphyliniformia)

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