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Dickinson E, Manzo M, Davis CE, Kolli S, Schwenk A, Carter A, Liu C, Vasipalli N, Ratkiewicz A, Deutsch AR, Granatosky MC, Hartstone-Rose A. Ecological correlates of three-dimensional muscle architecture within the dietarily diverse Strepsirrhini. Anat Rec (Hoboken) 2024; 307:1975-1994. [PMID: 38063131 DOI: 10.1002/ar.25361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 10/27/2023] [Accepted: 11/22/2023] [Indexed: 05/08/2024]
Abstract
Analysis of muscle architecture, traditionally conducted via gross dissection, has been used to evaluate adaptive relationships between anatomical form and behavioral function. However, gross dissection cannot preserve three-dimensional relationships between myological structures for analysis. To analyze such data, we employ diffusible, iodine-based contrast-enhanced computed tomography (DiceCT) to explore the relationships between feeding ecology and masticatory muscle microanatomy in eight dietarily diverse strepsirrhines: allowing, for the first time, preservation of three-dimensional fascicle orientation and tortuosity across a functional comparative sample. We find that fascicle properties derived from these digital analyses generally agree with those measured from gross-dissected conspecifics. Physiological cross-sectional area was greatest in species with mechanically challenging diets. Frugivorous taxa and the wood-gouging species all exhibit long jaw adductor fascicles, while more folivorous species show the shortest relative jaw adductor fascicle lengths. Fascicle orientation in the parasagittal plane also seems to have a clear dietary association: most folivorous taxa have masseter and temporalis muscle vectors that intersect acutely while these vectors intersect obliquely in more frugivorous species. Finally, we observed notably greater magnitudes of fascicle tortuosity, as well as greater interspecific variation in tortuosity, within the jaw adductor musculature than in the jaw abductors. While the use of a single specimen per species precludes analysis of intraspecific variation, our data highlight the diversity of microanatomical variation that exists within the strepsirrhine feeding system and suggest that muscle architectural configurations are evolutionarily labile in response to dietary ecology-an observation to be explored across larger samples in the future.
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Affiliation(s)
- Edwin Dickinson
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
- Department of Anatomy, College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, New York, USA
| | - Madison Manzo
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Cassidy E Davis
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Shruti Kolli
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
- Department of Biological Sciences, University of Denver, Denver, Colorado, USA
| | - Alysa Schwenk
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
- College of Public Health, Thomacharles Jefferson University, Philadelphia, Pennsylvania, USA
| | - Ashley Carter
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Cindy Liu
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Nimi Vasipalli
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Aleksandra Ratkiewicz
- Department of Anatomy, College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, New York, USA
| | - Ashley R Deutsch
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Michael C Granatosky
- Department of Anatomy, College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, New York, USA
- Center for Biomedical Innovation, College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, New York, USA
| | - Adam Hartstone-Rose
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
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2
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Straight PJ, Gignac PM, Kuenzel WJ. A histological and diceCT-derived 3D reconstruction of the avian visual thalamofugal pathway. Sci Rep 2024; 14:8447. [PMID: 38600121 PMCID: PMC11006926 DOI: 10.1038/s41598-024-58788-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Accepted: 04/03/2024] [Indexed: 04/12/2024] Open
Abstract
Amniotes feature two principal visual processing systems: the tectofugal and thalamofugal pathways. In most mammals, the thalamofugal pathway predominates, routing retinal afferents through the dorsolateral geniculate complex to the visual cortex. In most birds, the thalamofugal pathway often plays the lesser role with retinal afferents projecting to the principal optic thalami, a complex of several nuclei that resides in the dorsal thalamus. This thalamic complex sends projections to a forebrain structure called the Wulst, the terminus of the thalamofugal visual system. The thalamofugal pathway in birds serves many functions such as pattern discrimination, spatial memory, and navigation/migration. A comprehensive analysis of avian species has unveiled diverse subdivisions within the thalamic and forebrain structures, contingent on species, age, and techniques utilized. In this study, we documented the thalamofugal system in three dimensions by integrating histological and contrast-enhanced computed tomography imaging of the avian brain. Sections of two-week-old chick brains were cut in either coronal, sagittal, or horizontal planes and stained with Nissl and either Gallyas silver or Luxol Fast Blue. The thalamic principal optic complex and pallial Wulst were subdivided on the basis of cell and fiber density. Additionally, we utilized the technique of diffusible iodine-based contrast-enhanced computed tomography (diceCT) on a 5-week-old chick brain, and right eyeball. By merging diceCT data, stained histological sections, and information from the existing literature, a comprehensive three-dimensional model of the avian thalamofugal pathway was constructed. The use of a 3D model provides a clearer understanding of the structural and spatial organization of the thalamofugal system. The ability to integrate histochemical sections with diceCT 3D modeling is critical to better understanding the anatomical and physiologic organization of complex pathways such as the thalamofugal visual system.
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Affiliation(s)
- Parker J Straight
- Poultry Science Department, University of Arkansas, Fayetteville, AR, USA.
| | - Paul M Gignac
- Cellular and Molecular Medicine Department, University of Arizona Health Sciences, Tucson, AZ, USA
- MicroCT Imaging Consortium for Research and Outreach, University of Arkansas, Fayetteville, AR, USA
| | - Wayne J Kuenzel
- Poultry Science Department, University of Arkansas, Fayetteville, AR, USA
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Straight PJ, Gignac PM, Kuenzel WJ. Mapping the avian visual tectofugal pathway using 3D reconstruction. J Comp Neurol 2024; 532:e25558. [PMID: 38047431 DOI: 10.1002/cne.25558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 06/19/2023] [Accepted: 10/17/2023] [Indexed: 12/05/2023]
Abstract
Image processing in amniotes is usually accomplished by the thalamofugal and/or tectofugal visual systems. In laterally eyed birds, the tectofugal system dominates with functions such as color and motion processing, spatial orientation, stimulus identification, and localization. This makes it a critical system for complex avian behavior. Here, the brains of chicks, Gallus gallus, were used to produce serial brain sections in either coronal, sagittal, or horizontal planes and stained with either Nissl and Gallyas silver myelin or Luxol fast blue stain and cresyl echt violet (CEV). The emerging techniques of diffusible iodine-based contrast-enhanced computed tomography (diceCT) coupled with serial histochemistry in three planes were used to generate a comprehensive three-dimensional (3D) model of the avian tectofugal visual system. This enabled the 3D reconstruction of tectofugal circuits, including the three primary neuronal projections. Specifically, major components of the system included four regions of the retina, layers of the optic tectum, subdivisions of the nucleus rotundus in the thalamus, the entopallium in the forebrain, and supplementary components connecting into or out of this major avian visual sensory system. The resulting 3D model enabled a better understanding of the structural components and connectivity of this complex system by providing a complete spatial organization that occupied several distinct brain regions. We demonstrate how pairing diceCT with traditional histochemistry is an effective means to improve the understanding of, and thereby should generate insights into, anatomical and functional properties of complicated neural pathways, and we recommend this approach to clarify enigmatic properties of these pathways.
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Affiliation(s)
- Parker J Straight
- Poultry Science Department, University of Arkansas, Fayetteville, Arkansas, USA
| | - Paul M Gignac
- Cellular and Molecular Medicine Department, University of Arizona Health Sciences, Tucson, Arizona, USA
- Anatomy and Cell Biology Department, Oklahoma State University Center for Health Sciences, Tulsa, Oklahoma, USA
| | - Wayne J Kuenzel
- Poultry Science Department, University of Arkansas, Fayetteville, Arkansas, USA
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Miller CV, Pittman M, Wang X, Zheng X, Bright JA. Quantitative investigation of pengornithid enantiornithine diet reveals macrocarnivorous ecology evolved in birds by Early Cretaceous. iScience 2023; 26:106211. [PMID: 36923002 PMCID: PMC10009206 DOI: 10.1016/j.isci.2023.106211] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/12/2023] [Accepted: 02/13/2023] [Indexed: 02/18/2023] Open
Abstract
The diet of Mesozoic birds is poorly known, limiting evolutionary understanding of birds' roles in modern ecosystems. Pengornithidae is one of the best understood families of Mesozoic birds, hypothesized to eat insects or only small amounts of meat. We investigate these hypotheses with four lines of evidence: estimated body mass, claw traditional morphometrics, jaw mechanical advantage, and jaw finite element analysis. Owing to limited data, the diets of Eopengornis and Chiappeavis remain obscure. Pengornis, Parapengornis, and Yuanchuavis show adaptations for vertebrate carnivory. Pengornis also has talons similar to living raptorial birds like caracaras that capture and kill large prey, which represents the earliest known adaptation for macrocarnivory in a bird. This supports the appearance of this ecology ∼35 million years earlier than previously thought. These findings greatly increase the niche breadth known for Early Cretaceous birds, and shift the prevailing view that Mesozoic birds mainly occupied low trophic levels.
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Affiliation(s)
- Case Vincent Miller
- Department of Earth Sciences, the University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Michael Pittman
- School of Life Sciences, the Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Xiaoli Wang
- Institute of Geology and Paleontology, Linyi University, Linyi, Shandong 276005, China.,Shandong Tianyu Museum of Nature, Pingyi, Shandong 273300, China
| | - Xiaoting Zheng
- Institute of Geology and Paleontology, Linyi University, Linyi, Shandong 276005, China.,Shandong Tianyu Museum of Nature, Pingyi, Shandong 273300, China
| | - Jen A Bright
- Department of Biological and Marine Sciences, University of Hull, Hull HU6 7RX, UK
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Dickinson E, Hartstone-Rose A. Behavioral correlates of fascicular organization: The confluence of muscle architectural anatomy and function. Anat Rec (Hoboken) 2023. [PMID: 36880440 DOI: 10.1002/ar.25187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/20/2023] [Accepted: 02/16/2023] [Indexed: 03/08/2023]
Abstract
Muscle is a complex tissue that has been studied on numerous hierarchical levels: from gross descriptions of muscle organization to cellular analyses of fiber profiles. In the middle of this space between organismal and cellular biology lies muscle architecture, the level at which functional correlations between a muscle's internal fiber organization and contractile abilities are explored. In this review, we summarize this relationship, detail recent advances in our understanding of this form-function paradigm, and highlight the role played by The Anatomical Record in advancing our understanding of functional morphology within muscle over the past two decades. In so doing, we honor the legacy of Editor-in-Chief Kurt Albertine, whose stewardship of the journal from 2006 through 2020 oversaw the flourishing of myological research, including numerous special issues dedicated to exploring the behavioral correlates of myology across diverse taxa. This legacy has seen the The Anatomical Record establish itself as a preeminent source of myological research, and a true leader within the field of comparative anatomy and functional morphology.
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Affiliation(s)
- Edwin Dickinson
- Department of Anatomy, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, USA
| | - Adam Hartstone-Rose
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
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Wynd B, Abdala F, Nesbitt SJ. Ontogenetic growth in the crania of Exaeretodon argentinus (Synapsida: Cynodontia) captures a dietary shift. PeerJ 2022; 10:e14196. [PMID: 36299507 PMCID: PMC9590418 DOI: 10.7717/peerj.14196] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 09/15/2022] [Indexed: 01/26/2023] Open
Abstract
Background An ontogenetic niche shift in vertebrates is a common occurrence where ecology shifts with morphological changes throughout growth. How ecology shifts over a vertebrate's lifetime is often reconstructed in extant species-by combining observational and skeletal data from growth series of the same species-because interactions between organisms and their environment can be observed directly. However, reconstructing shifts using extinct vertebrates is difficult and requires well-sampled growth series, specimens with relatively complete preservation, and easily observable skeletal traits associated with ecologies suspected to change throughout growth, such as diet. Methods To reconstruct ecological changes throughout the growth of a stem-mammal, we describe changes associated with dietary ecology in a growth series of crania of the large-bodied (∼2 m in length) and herbivorous form, Exaeretodon argentinus (Cynodontia: Traversodontidae) from the Late Triassic Ischigualasto Formation, San Juan, Argentina. Nearly all specimens were deformed by taphonomic processes, so we reconstructed allometric slope using a generalized linear mixed effects model with distortion as a random effect. Results Under a mixed effects model, we find that throughout growth, E. argentinus reduced the relative length of the palate, postcanine series, orbits, and basicranium, and expanded the relative length of the temporal region and the height of the zygomatic arch. The allometric relationship between the zygomatic arch and temporal region with the total length of the skull approximate the rate of growth for feeding musculature. Based on a higher allometric slope, the zygoma height is growing relatively faster than the length of the temporal region. The higher rate of change in the zygoma may suggest that smaller individuals had a crushing-dominated feeding style that transitioned into a chewing-dominated feeding style in larger individuals, suggesting a dietary shift from possible faunivory to a more plant-dominated diet. Dietary differentiation throughout development is further supported by an increase in sutural complexity and a shift in the orientation of microwear anisotropy between small and large individuals of E. argentinus. A developmental transition in the feeding ecology of E. argentinus is reflective of the reconstructed dietary transition across Gomphodontia, wherein the earliest-diverging species are inferred as omnivorous and the well-nested traversodontids are inferred as herbivorous, potentially suggesting that faunivory in immature individuals of the herbivorous Traversodontidae may be plesiomorphic for the clade.
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Affiliation(s)
- Brenen Wynd
- Department of Geosciences, Virginia Tech, Blacksburg, VA, United States of America
| | - Fernando Abdala
- CONICET-Fundación Miguel Lillo, Unidad Ejecutora Lillo, San Miguel de Tucumán, Tucumán, Argentina,Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg, South Africa
| | - Sterling J. Nesbitt
- Department of Geosciences, Virginia Tech, Blacksburg, VA, United States of America
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Korntner SH, Jana A, Kinnard E, Leo E, Beane T, Li X, Sengupta R, Becker L, Kuo CK. Craniofacial tendon development—Characterization of extracellular matrix morphology and spatiotemporal protein distribution. Front Cell Dev Biol 2022; 10:944126. [PMID: 36158210 PMCID: PMC9490420 DOI: 10.3389/fcell.2022.944126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 08/10/2022] [Indexed: 11/13/2022] Open
Abstract
Craniofacial (CF) tendons are often affected by traumatic injuries and painful disorders that can severely compromise critical jaw functions, such as mastication and talking. Unfortunately, tendons lack the ability to regenerate, and there are no solutions to restore their native properties or function. An understanding of jaw tendon development could inform tendon regeneration strategies to restore jaw function, however CF tendon development has been relatively unexplored. Using the chick embryo, we identified the jaw-closing Tendon of the musculus Adductor Mandibulae Externus (TmAM) and the jaw-opening Tendon of the musculus Depressor Mandibulae (TmDM) that have similar functions to the masticatory tendons in humans. Using histological and immunohistochemical (IHC) analyses, we characterized the TmAM and TmDM on the basis of cell and extracellular matrix (ECM) morphology and spatiotemporal protein distribution from early to late embryonic development. The TmAM and TmDM were detectable as early as embryonic day (d) 9 based on histological staining and tenascin-C (TNC) protein distribution. Collagen content increased and became more organized, cell density decreased, and cell nuclei elongated over time during development in both the TmAM and TmDM. The TmAM and TmDM exhibited similar spatiotemporal patterns for collagen type III (COL3), but differential spatiotemporal patterns for TNC, lysyl oxidase (LOX), and matrix metalloproteinases (MMPs). Our results demonstrate markers that play a role in limb tendon formation are also present in jaw tendons during embryonic development, implicate COL3, TNC, LOX, MMP2, and MMP9 in jaw tendon development, and suggest TmAM and TmDM possess different developmental programs. Taken together, our study suggests the chick embryo may be used as a model with which to study CF tendon extracellular matrix development, the results of which could ultimately inform therapeutic approaches for CF tendon injuries and disorders.
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Affiliation(s)
- Stefanie H. Korntner
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, United States
| | - Aniket Jana
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, United States
| | - Elizabeth Kinnard
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, United States
| | - Emily Leo
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, United States
| | - Timothy Beane
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States
| | - Xianmu Li
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States
| | - Rohit Sengupta
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, United States
| | - Lauren Becker
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, United States
| | - Catherine K. Kuo
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, United States
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States
- Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, United States
- Department of Orthopaedics, University of Maryland Medical Center, Baltimore, MD, United States
- *Correspondence: Catherine K. Kuo,
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Miller CV, Pittman M, Wang X, Zheng X, Bright JA. Diet of Mesozoic toothed birds (Longipterygidae) inferred from quantitative analysis of extant avian diet proxies. BMC Biol 2022; 20:101. [PMID: 35550084 PMCID: PMC9097364 DOI: 10.1186/s12915-022-01294-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 04/12/2022] [Indexed: 11/10/2022] Open
Abstract
Background Birds are key indicator species in extant ecosystems, and thus we would expect extinct birds to provide insights into the nature of ancient ecosystems. However, many aspects of extinct bird ecology, particularly their diet, remain obscure. One group of particular interest is the bizarre toothed and long-snouted longipterygid birds. Longipterygidae is the most well-understood family of enantiornithine birds, the dominant birds of the Cretaceous period. However, as with most Mesozoic birds, their diet remains entirely speculative. Results To improve our understanding of longipterygids, we investigated four proxies in extant birds to determine diagnostic traits for birds with a given diet: body mass, claw morphometrics, jaw mechanical advantage, and jaw strength via finite element analysis. Body mass of birds tended to correspond to the size of their main food source, with both carnivores and herbivores splitting into two subsets by mass: invertivores or vertivores for carnivores, and granivores + nectarivores or folivores + frugivores for herbivores. Using claw morphometrics, we successfully distinguished ground birds, non-raptorial perching birds, and raptorial birds from one another. We were unable to replicate past results isolating subtypes of raptorial behaviour. Mechanical advantage was able to distinguish herbivorous diets with particularly high values of functional indices, and so is useful for identifying these specific diets in fossil taxa, but overall did a poor job of reflecting diet. Finite element analysis effectively separated birds with hard and/or tough diets from those eating foods which are neither, though could not distinguish hard and tough diets from one another. We reconstructed each of these proxies in longipterygids as well, and after synthesising the four lines of evidence, we find all members of the family but Shengjingornis (whose diet remains inconclusive) most likely to be invertivores or generalist feeders, with raptorial behaviour likely in Longipteryx and Rapaxavis. Conclusions This study provides a 20% increase in quantitatively supported fossil bird diets, triples the number of diets reconstructed in enantiornithine species, and serves as an important first step in quantitatively investigating the origins of the trophic diversity of living birds. These findings are consistent with past hypotheses that Mesozoic birds occupied low trophic levels. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-022-01294-3.
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Affiliation(s)
- Case Vincent Miller
- Department of Earth Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR, China.
| | - Michael Pittman
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China. .,Department of Earth Sciences, University College London, Gower Street, London, WC1E 6BT, UK.
| | - Xiaoli Wang
- Institute of Geology and Paleontology, Linyi University, Linyi City, Shandong, 276005, China.,Shandong Tianyu Museum of Nature, Pingyi, Shandong, 273300, China
| | - Xiaoting Zheng
- Institute of Geology and Paleontology, Linyi University, Linyi City, Shandong, 276005, China.,Shandong Tianyu Museum of Nature, Pingyi, Shandong, 273300, China
| | - Jen A Bright
- Department of Biological and Marine Sciences, University of Hull, Hull, HU6 7RX, UK
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Deeming DC, Harrison SL, Sutton GP. Inter‐relationships among body mass, jaw musculature and bite force in birds. J Zool (1987) 2022. [DOI: 10.1111/jzo.12966] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- D. C. Deeming
- School of Life Sciences University of Lincoln Joseph Banks Laboratories Lincoln LN6 7DL UK
| | - S. L. Harrison
- School of Life Sciences University of Lincoln Joseph Banks Laboratories Lincoln LN6 7DL UK
| | - G. P. Sutton
- School of Life Sciences University of Lincoln Joseph Banks Laboratories Lincoln LN6 7DL UK
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