Rhynchelmis aleutensis n. sp. (Clitellata: Lumbriculidae) from Adak Island, Alaska

Steven V. Fend

doi:10.11646/zootaxa.1093.1.4

Home/Archive/USGS

USGS · 70027719

Rhynchelmis aleutensis n. sp. (Clitellata: Lumbriculidae) from Adak Island, Alaska

Steven V. Fend

View original source ↗Export metadata ↓

Abstract

A new lumbriculid worm, Rhynchelmis aleutensis , is described from streams on Adak Island, Alaska. The new species does not resemble other Alaskan or Siberian Rhynchelmis species. The paired spermathecal diverticula and the morphology of the male pores and atria suggest that it is more closely related to a species group known only from the western United States, south of Canada. The latter group has been associated with Sutroa Eisen, 1888.

Explore related subjects

Zootaxa Article

Source-reported bounding extent: 51.578776399817066° to 52.00771005263849° latitude; -177.00210571289062° to -176.41708374023438° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

Keep this discovery

Explore connections, maps & timelines

BibTeX RIS

Steven V. Fend. 2005-12-08. Rhynchelmis aleutensis n. sp. (Clitellata: Lumbriculidae) from Adak Island, Alaska. https://doi.org/10.11646/zootaxa.1093.1.4

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related USGS reports

USGS2026

Description of multiple cryptic species of Obovaria Rafinesque, 1819 (Bivalvia: Unionida) from the Mississippi Embayment and Gulf coastal rivers of North America

The freshwater mussel genus Obovaria (Bivalvia: Unionidae) has long been recognized as taxonomically challenging due to plastic shell morphology, historical misidentifications, and incomplete geographic sampling across the southeastern United States. Using an integrated approach combining shell morphology, comparative conchology, geographic distribution, and molecular phylogenetic evidence, we revise the taxonomy of Obovaria in the Gulf Coastal Plain and adjacent drainages. We describe five new species: Obovaria sipseyensis sp. nov. from the Tombigbee River basin of Alabama and Mississippi; Obovaria neeskaensis sp. nov. from the White River basin of Arkansas and Missouri; Obovaria pinetorum sp. nov. from the west Gulf Coast drainages of Louisiana and Texas; Obovaria tallahattae sp. nov. from lower Mississippi River tributaries of Mississippi; and Obovaria lumbo sp. nov. from Lake Pontchartrain, Pascagoula River, and Pearl River basins of Louisiana and Mississippi. We further recognize Pseudoon olivarium comb. nov. based on its phylogenetic distinctiveness from Obovaria . Our results reveal previously unrecognized endemism and cryptic diversity within Obovaria , with significant implications for conservation and management. Several species treated herein are rare and geographically restricted, underscoring how basin-specific conservation strategies and accurate taxonomic recognition can guide freshwater mussel recovery efforts.

Mississippi Embayment and Gulf Coastal Plain river↗

USGS2025

Systematics of three Amazonian antwren groups (Aves: Passeriformes: Thamnophilidae: Myrmotherula and Isleria)

Working within the framework of a companion phylogenetic analysis, we reexamined species limits within three lineages of antwrens (two species and one species complex) widely distributed across the Amazon Basin. Diagnostic differences in vocal and plumage characters provided the basis for the following taxonomic revisions. Myrmotherula longipennis is found to comprise three species: (1) M. longipennis ( sensu stricto ), which is confined to the region north of the Amazon; (2) M. garbei , which is elevated from subspecies status and includes the subspecies zimmeri ; and (3) M. paraensis , which is also elevated from subspecies status and includes subspecies transitiva and ochrogyna . Myrmotherula menetriesii also comprises three species: (1) M. menetriesii ( sensu stricto ), which occurs in the southwest quadrant of Amazonia and includes the subspecies berlepschi ; (2) M. cinereiventris , which is elevated from subspecies status and includes the subspecies pallida ; and (3) M. omissa , which is monotypic and is also elevated from subspecies status. We maintain two species in the Isleria complex, I. guttata and I. hauxwelli . Isleria guttata remains monotypic, but the subspecies of I. hauxwelli are revised. Isleria h. hellmayri is preserved as currently defined, but I. h. suffusa is synonymized with the nominate form, the geographic range of which is restricted to western Amazonia. A fourth subspecies, I. h. clarior , is resurrected; this subspecies occupies the major part of the range previously assigned to I. h. hauxwelli .

Zootaxa↗

USGS2024

Phylogenomics, male internal genitalia, a new species, and other notes on New World Stenopelmatus Jerusalem crickets (Orthoptera: Stenopelmatoidea: Stenopelmatini)

Based on past and expanded DNA sampling, the orthopteran families Stenopelmatidae and Anostostomatidae, as currently structured, are shown to be non-monophyletic. The splay-footed cricket genus Comicus is confirmed to be genetically distinct from all Stenopelmatidae. We add two specimens to our previously published phylogenetic tree for New World Stenopelmatus Jerusalem cricket species and report the first multilocus DNA recovery for S. ater from Costa Rica. Male internal genitalia may be of systematic value in Jerusalem crickets, but we believe they should be analyzed when in their unfolded, “physiologically functional” configuration, where morphological characters can be seen in more detail when compared to their preserved, folded state. We describe Stenopelmatus nuevoguatemalae n. sp. from Guatemala.

Zootaxa↗