A global review of life history studies on burrowing crayfish

Crustaceana ◽  
2021 ◽  
Vol 94 (3) ◽  
pp. 357-379
Author(s):  
Caitlin C. Bloomer ◽  
Robert J. DiStefano ◽  
Christopher A. Taylor

Abstract Burrowing crayfishes have historically lacked life history data due to their elusive nature and difficultly extracting them from burrows. This review provides a synopsis of current literature on burrowing crayfishes’ life histories and a quantitative analysis of published life history content. Only 69 publications covering 94 burrowing species (approx. 39%) met our criteria for a life history study. Many species had only partial life histories documented and two genera (Engaewa and Tenuibranchiurus) had no life history studies available. Size and reproductive season were the most recorded traits across studies while others such as mortality and age/size at molting events were rarely recorded. Reproductive investment, an important predictor of imperilment, was lacking in 87% of burrowing species. Our review emphasizes the need to include life history data with new species descriptions and conduct basic life history studies to effectively assess data-deficient species and protect the future of our threatened burrowing crayfishes.

1982 ◽  
Vol 114 (7) ◽  
pp. 575-589 ◽  
Author(s):  
J. D. Lafontaine ◽  
J. R. Byers

AbstractThe comosa group of the genus Euxoa is defined on the basis of genital characters. The species in the group are: comosa (Morrison), lineifrons (Smith), guadalupensis new species, lucida Barnes and McDunnough, fumalis (Grote), and occidentalis new species. On the basis of geographical variation of adults, life history data, and experimental hybridization, populations of E. comosa are arranged in five subspecies. Adults and genitalia are illustrated and a synopsis is given for each species and subspecies.


1988 ◽  
Vol 66 (5) ◽  
pp. 1179-1183 ◽  
Author(s):  
Carl M. Way

A survey of patterns of covariation of six life history traits in 13 species (26 populations) of pisidiid bivalves was carried out using canonical discriminant analysis. The analysis separated the three genera of pisidiids into significantly different clusters. The traits that separated the genera have been called life history tactics and the genera have been placed along an r–K continuum. Univariate phenotypic correlation statistics were used to identify specific life history traits that covary at the genus and interspecific levels. The identifiable groupings of life history traits and traits that strongly covary appear to be influenced in part by phylogeny (size differences between genera), allometry (size differences within a cohort), and habitat (both localized and historical influences). At the present time there is a lack of the detailed intraspecific life history data necessary to sort out the causality behind the groupings of traits. It will be necessary to make detailed comparisons of life histories at the intraspecific level to attain an understanding of the proximal processes involved in causing life history variability.


ZooKeys ◽  
2020 ◽  
Vol 997 ◽  
pp. 95-144
Author(s):  
Nontawat Chatthanabun ◽  
John S. Ascher ◽  
Nantasak Pinkaew ◽  
Chawatat Thanoosing ◽  
Prapun Traiyasut ◽  
...  

Resin bees of the genus Megachile subgenus Callomegachile sensu lato (Hymenoptera; Megachilidae) from Thailand are reviewed. The 14 species treated include those described or revised in the subgenus Alocanthedon, a junior synonym of Callomegachile (three species), and in Carinula (one species). One new species is described, Megachile chiangmaiensis Chatthanabun and Warrit, sp. nov. The replacement name Megachile parornata Chatthanabun, Warrit and Ascher, nom. nov., is proposed for M. gigas Wu (not Schrottky), which is recorded for the first time outside China. For each species, maps and full label data for the examined material documenting occurrences in Thailand are provided. In addition, global ranges, floral associations, and other life history data are summarized and a key to the Thai species is provided for females.


Zootaxa ◽  
2010 ◽  
Vol 2413 (1) ◽  
pp. 61 ◽  
Author(s):  
D. CHRISTOPHER ROGERS ◽  
STEPHEN C. WEEKS ◽  
WALTER R. HOE

Eulimnadia graniticola n. sp. from Stone Mountain, Georgia, and the Florida Keys, USA, is defined primarily on molecular characters and egg morphology. Ecological, reproductive and life history data are provided. This species is the second species of branchiopod crustacean reported from Stone Mountain more closely related to the South American fauna than to its North American congeners.


Parasitology ◽  
1964 ◽  
Vol 54 (4) ◽  
pp. 601-676 ◽  
Author(s):  
J. C. Pearson

Earlier schemes of classification of the family Heterophyidae have been based in large part on such features as shape of body, presence of oral spines, number and position of testes, and distribution of vitellaria (Witenberg, 1929; Ciurea, 1933; Mueller & Van Cleave, 1932). Price (1940a) was the first to make extensive use of features of the ventrogenital complex (ventral sucker, gonotyl, genital pore, terminal male duct) and excretory bladder, and produced the first reasonable classification of both the family Heterophyidae and the superfamily Opisthorchioidea. In despite of the obvious significance of the rationale of Price's approach, later authors (Morozov, 1952, 1955; Yamaguti, 1958) have largely ignored the ventrogenital complex and recently discovered life-history data, and have used much the same sorts of features as earlier authors.


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