Fredric Govedich

Fredric Govedich
Southern Utah University | SUU · Biology

BSc, MS, PhD

About

35
Publications
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351
Citations

Publications

Publications (35)
Article
Full-text available
With more than 700 described species, leeches include morphological, physiological, and behavioral diversity and occur in terrestrial and aquatic habitats, including freshwater, estuarine, and marine ecosystems. Leeches inhabit a number of extreme environments, including extremes in temperature, moisture, salinity, pressure, light, and pollution. I...
Article
Full-text available
This original form of this rebuttal was submitted to Science on 3 March 2017 (limited to 300 words as per Science editorial policy) but rejected on 13 March 2017. Herein, we elaborate on our original Science submission in order to more fully address the issue without the length limitations. This rebuttal is followed by the list of the signatories w...
Article
Full-text available
A new leech species Helobdella blinni sp. n., is described from Montezuma Well, an isolated travertine spring mound located in central Arizona, USA. In its native habitat, H. blinni had been previously identified as Helobdella stagnalis (Linnaeus, 1758), which was later reclassified to Helobdella modesta (Verrill, 1872). Similar to the European H....
Chapter
Full-text available
The second volume in this landmark series includes an introductory chapter followed by 15 taxonomically specific chapters with identification keys to Nearctic freshwater invertebrates (protozoa through arthropods). Other than the second chapter’s treatment of the diverse, multi-phyla array of protozoa (ciliates, flagellates, and amoebas), each of t...
Chapter
An updated and revised account of the systematics, phylogenetic relationships, distribution and diversity of leeches (Hirudinida) and acanthobdellids found throughout the world is included in this chapter. In addition, information on the external and internal anatomy, physiology, reproduction and life history, ecology, and behavior of these animals...
Article
Full-text available
Evolutionary theory is the foundation of the biological sciences, yet conveying it to General Biology students often presents a challenge, especially at larger institutions where student numbers in foundation courses can exceed several hundred per lecture section. We present a pedagogically sound exercise that utilizes a series of simple and inexpe...
Article
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Helobdella bowermani n. sp. is described from specimens collected in fine sediment of open water benthos of Upper Klamath Lake, Klamath County, Oregon. The new species has pale yellow/buff coloration with scattered chromatophore blotches throughout the dorsal surface, lateral extensions or papillae only on the a2 annulus, dorsal medial row of papil...
Article
The identification and taxonomy of papillated leeches of the genus Placobdella have been extremely problematic, confounded by vague descriptions, redescriptions of species without reference to type material or type locality, and more than a century of numerous dubious taxonomic acts. Leeches collected on August 5 and 6, 2011, from North Dakota, USA...
Article
Full-text available
A new genus, Motobdella, is recognized for Erpobdella montezuma Davies, Singhal, and Blinn, 1985. In addition, a new species for this genus, Motobdella sedonensis, is described. Morphological characters that include the presence of crop caeca, number and size of the eyes, arrangement of the eyes, arrangement of ovisacs, position of the gonopore, st...
Article
Despite apparent long-term geographic isolation, many invertebrates demonstrate little apparent morphological differentiation. To examine underlying genetic differentiation, eight erpobdellid leech populations from widely dispersed northern Arizona aquatic ecosystems were examined by means of amplified fragment length polymorphism genetic markers....
Chapter
Full-text available
This chapter focuses on freshwater annelids of North America. Freshwater annelids (oligochaetes, branchiobdellidans, leeches, and acanthobdellids) can be found in both standing and flowing water and are often an important component of the aquatic food web. There are currently over 200 oligochaete species reported from North America that inhabit fre...
Chapter
IntroductionHistoryDistribution and Host RangeEtiologyEpizootiologyClinical SignsPathogenesis and PathologyDiagnosisImmunityPublic Health and Domestic Animal Health ConcernsTreatment and ControlLiterature Cited
Article
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Conflict among siblings over parental investment, particularly over parental feeding, is a feature of family life in many kinds of animals. In some bird species, the size of prey items provided to juveniles has been implicated as a cause of aggressive competition among sibling chicks, because prey size determines whether dominance allows monopoliza...
Article
Full-text available
Placobdelloides bancrofti (Best, 1931) Sawyer, 1986 (Euhirudinea: Glossiphoniidae) is recorded for the first time from a location in North Queensland, Australia. Placobdelloides bancrofti was found feeding on the freshwater turtle Emydura krefftii and was collected from a new host species Elseya latisternum. Examination of live individuals enabled...
Article
Full-text available
The few published observations on pycnogonid courtship and mating behavior are widely scattered in the literature and there are no recent summaries available. Consequentially, the exclusively paternal care which is characteristic of this little-known group of marine invertebrates remains understudied by modern behavioral biologists. The current pap...
Article
Social group size may affect the potential for sperm competition, and this in turn may favour ontogenetic adjustments in testicular mass according to the likely requirements for sperm and spermatophore production. In a number of comparative analyses of testis mass among vertebrate species that differ in mating system or social organization, increas...
Article
Full-text available
Helobdella papillornata, an Australian freshwater leech, feeds primarily on snails and has a high level of parental care involving brooding eggs and young, with direct feeding of young. Parental costs and offspring benefits from these behaviours are poorly understood. A potential cost of parental care may be a change in the time taken to hunt prey....
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Full-text available
Barbronia weberi were collected from Hydrilla verticillata purchased from aquarium suppliers in Melbourne, Australia and additional B.weberi were obtained from aquatic plants in Canberra, ACT, Australia. Adult leeches fed Tubifex sp. adlibitum successfully reproduced under laboratory conditions (215C ). Reproductively mature B.weberi produced cocoo...
Article
A new species of Placobdelloides is described from crocodiles and river turtles in the Singapore Zoological Gardens. Placobdelloides stellapapillosa is three annulate, has one pair of eyes on somite I or II, six pairs of testisacs, two annuli between the gonopores, one post anal annulus, seven pairs of lobed crop caeca and 12–14 unique star-shaped...
Chapter
Leeches form an important component of the benthos of most lakes and ponds, and some species commonly occur in the quieter flowing sections of streams and rivers. There are 73 species presently recorded from North America, of which the majority is predators feeding on chironomids, oligochaetes, amphipods, and molluscs. The young of several species...
Article
A new freshwater leech species, Helobdella nilae, is described with diagnostically a dorsal nuchal gland (scute) on somite VII, five pairs of simple crop caeca, the last pair extending posteriorly as postcaeca, five pairs of compact spherical testisacs, an unpigmented dorsal surface lacking both papillae and sensilla. The mouth is subapical and sur...
Article
Seven new species of myxosporeans are described from gills of seven freshwater species of fish from Egypt. The annual developmental cycle of the gills involves a period of summer invasion, followed in the autumn by development of cysts (plasmodia + host capsule) and initiation of sporogenesis, completion of sporogenesis in the winter, and the relea...
Article
Despite apparent long-term geographic isolation, many invertebrates demonstrate little apparent morphological differentation. To examine underlying genetic differentiation, eight erpobdellid leech populations from widely dispersed northern Arizona' aquatic ecosystems were examined by means of amplified fragment length polymorphism genetic markers....
Article
The first species of the genus Helobdella in Australia is recorded from Victoria. Helobdella papillornata has all of the diagnostic features of the genus including: triannulate segments, one pair of eyes on somite II, diffuse salivary glands, five crop caeca, one annulus between the gonopores and one annulus between the anus and the caudal sucker....
Article
A new genus, Motobdella, is recognized for Erpodbella,montezuma Davies, Singhal, and Blinn, 1985. In addition, a new species for this genus, Motobdella sedonensis, is described. Morphological characters that include the presence of crop caeca, number and size of the eyes, arrangement of the eyes, arrangement of ovisacs, position of the gonopore, st...

Projects

Project (1)